repairing historic windows

Storm window frames may be made of wood, aluminum, vinyl, or plastic; however, the use of unfinished aluminum storms should be avoided. Download this feature article to learn more about restoring and replacing historic wood windows. Whole Part Renewal: Remove the broken stile from the sash. 18 Rehabilitating Interiors remove paint with specialized tool. Step 5. While I used modern epoxy materials on this repair, I have seen century-old sash dutchmen repairs still performing admirably. Replacing old wood screens A few tricks and some advice on making new wooden window screens; Repairing wood windows Our old windows had broken glass and crumbling putty. Bad repair works can be difficult and expensive to undo. Written for homeowners, architects, builders, engineers, and preservationists, Repairing Old and Historic Windows is the complete and authoritative guide to window maintenance and repair. (WindowStandards.org). Sash can be removed and repaired in a convenient work area. Learn basic preservation and documentation issues facing owners of buildings with leaded glass while also learning about common causes of deterioration and presents repair, restoration, and … 7 Terra-Cotta After noting areas of paint failure, the next step is to inspect the condition of the wood, particularly at the points identified during the paint examination. after a "skin" forms on the putty, paint the surface. Preservation: Present Pathway to Fall River's Future. The first step in deciding whether to repair or replace your windows is determining the problem. 23 Ornamental Plaster ASHRAE Handbook 1977 Fundamentals. It is now hoping to raise $60,000 to repair the broken glass. While the repair of old windows may not be one of my favorite jobs, it's not one I dislike -- and that's a good thing, as our home's 50- plus windows were all in need of attention when we bought the place. Repair Class I: Routine Maintenance 4. The wood was structurally sound but the window had one broken pane, many layers of paint, broken sash cords and inadequate, worn-out weatherstripping. Crucially, retaining historic windows of . Wood is frequently in sound physical condition beneath unsightly paint. 19 Wooden Shingle Roofs Each window should be examined for operational soundness beginning with the lower portions of the frame and sash. Photo: NPS files. Their design, craftsmanship, or other qualities may make them worthy of preservation. The Old House Web. The operation of the window (continuous opening and closing over the years and seasonal temperature changes) weakens the joints, causing movement and slight separation. 32 Accessibility Moisture which becomes trapped between the layers of glazing can condense on the colder, outer prime window, potentially leading to deterioration. Old House Journal (no. Dutchman LayoutThe dutchman will lap onto adjacent sound wood. They were simply made with new wood lapped onto old wood as shown here, fastened with two wood screws and no adhesive. Hardened putty in the rabbets may be softened by heating with a soldering iron at the point of removal. Step 8. Deterioration of poorly maintained windows usually begins on horizontal surfaces and at joints, where water can collect and saturate the wood. The same caution about proper slope for flat surfaces applies to this technique. A little searching should locate a firm which will do the job, and at a reasonable price. We offer historic windows in several design shapes including rectangle, round-top, eyebrow and gothic. What makes this repair effective and successful is not the wood or the adhesive; it is the skill and knowledge of the worker who created the repair. 12, 1979): 135. Detailed technical advice is provided on their maintenance, repair and thermal upgrading as well as on their restoration. These methods involve replacing the deteriorated parts with new matching pieces, or splicing new wood into existing members. They can damage a building The staff member found that the frame could be stripped of paint and the sash removed quite easily. 41 Seismic Rehabilitation According to ASHRAE 1977 Fundamentals, the U-values for single glazed wooden windows range from 0.88 to 0.99. However, even if historic windows are beyond repair and replacements are the only viable option, there are many factors to consider. 2 Repointing Mortar Joints That said, there are a few ways you can cut down on costs even more: Replace or repair multiple windows at once. In fact, a historic wooden window with a high quality storm window added should thermally outperform a new double-glazed metal window which does not have thermal breaks (insulation between the inner and outer frames intended to break the path of heat flow). In our work we followed this guiding principle from the national Window Preservation Standards: “Window Preservation is maintaining, repairing and upgrading older and historic windows. Although such locks will not always be historically accurate, they will usually be viewed as an acceptable contemporary modification in the interest of improved thermal performance. When comparing thermal performance, the lower the U-value the better the performance. The sill, joints between the sill and jamb, corners of the bottom rails and muntin joints are typical points where water collects and deterioration begins. Even for projects requiring repairs identified in this section, if the percentage of parts replacement per window is low, or the number of windows requiring repair is small, repair can still be a cost effective solution. New York: American Society of Heating, Refrigerating and Air-conditioning Engineers, 1978 (chapter 26). Learn More. 5 Adobe Buildings The Restoration and Repair of Historic Stained and Leaded Glass. The technique is simply to jab the pick into a wetted wood surface at an angle and pry up a small section of the wood. I can assure you that failures outnumber successes. Step 5: The stile socket is shaped with traditional woodworking tools. 33 Stained and Leaded Glass You can’t. 21 Flat Plaster With the glass panes out, the remaining putty can be removed and the sash can be sanded, patched, and primed with a preservative primer. A close look at the process of restoring repairing historic wood windows. If the ring orientation is not matched the old wood and new wood will expand and shrink in different directions, potentially stressing the joint resulting in a loose or open joint. (ptn.org), The Window Preservation Standards book offers guidance in organizing window projects and provides a set of detailed standard methods and procedures. A craftsman uses his skill and knowledge of basic materials, wood and epoxy resin, to create something that did not exist before: an effective repair. They are … Epoxy patching compounds can be used to build up missing sections or decayed ends of members. Techniques for these repairs are discussed in the following sections. Even though it’s two centuries old, it was still good, so I reused it.The sash was primed, reglazed, painted and put back in the Shaker horse barn. On larger projects it presents the opportunity for time and money which might otherwise be spent on the removal and replacement of existing windows, to be spent on repairs, subsequently saving all or part of the material cost of new window units. Thus, an important element of a building's significance will have been preserved for the future. Photo: NPS files. 45 Wooden Porches I definitely match the ring orientation, here on a slanting diagonal. With sharp tools and practiced woodworking skills on a few dutchmen this task goes much faster than if using power chop saws and routers. Almost all problems with old historic windows can be repaired or improved through our restoration process. With the stop removed, the lower or interior sash may be withdrawn. We provide custom entry door solutions from conception to installation for historic and designer homes and commercial landmark properties. Repair Class III: Splices and Parts Replacement 6. 20 Barns Note that most of the points mentioned in Repair Class I are routine maintenance items and should be provided in a regular maintenance program for any building. 17 Architectural Character 31 Mothballing Some degree of paint removal is also necessary as a first step in the proper surface preparation for subsequent refinishing (if paint color analysis is desired, it should be conducted prior to the onset of the paint removal). This would result in “open joints” that could be disassembled in the future. "Fixing Double-hung Windows." 40 Ceramic Tile Weeks, Kay D. and David W. Look, Preservation Brief 10: Exterior Paint Problems on Historic Woodwork. This method of fastening is holding up well. Then the trend was to remove, trash, and replace windows, particularly wood-framed windows, with new vinyl, fiberglass, wood, or metal options rather than repairing existing windows. I have done wood-epoxy repairs like this that are still performing well after 37 years, but I have seen some wood-epoxy repairs that rotten out after just 10 or 20 years. Include boilerplate from the manufacturers, and even more boilerplate from the window specialists themselves. See Preservation Briefs 1–50 2 vertical pieces called the “Stile” and two horizontal pieces called the “Rails”. 42 Cast Stone The final glazing compound or putty is applied and beveled to complete the seal. While it may be expensive for the average historic home owner to pay seventy dollars or more for a mill to grind a custom knife to duplicate four or five bad muntins, that cost becomes negligible on large commercial projects which may have several hundred windows. 10 Paint Problems Weatherstripping of the sash and frame, replacement of the sash cords and reinstallation of the sash, parting bead, and stop required an hour and a half. Arched top storms are available for windows with special shapes. Follow the manufacturers' directions and use only on areas which will be painted. The Secretary of the Interior's Standards for Rehabilitation and the accompanying guidelines, call for respecting the significance of original materials and features, repairing and retaining them wherever possible, and when necessary, replacing them in kind. The use of exterior storm windows should be investigated whenever feasible because they are thermally efficient, cost-effective, reversible, and allow the retention of original windows (see "Preservation Briefs: 3"). Repair Class II: Stabilization 5. 3 Improving Energy Efficiency The preceding description of a window repair job focused on a unit which was operationally sound. 024016000951), 1978. 50 Lightning Protection for Historic Structures. One of the most common work items is the replacement of the sash cords with new rope cords or with chains. Site-specific, regionally oriented architectural comparisons should be made to determine the significance of windows in question. A whole new stile would have taken 1.5 hours and used $4.00 in materials. Glue would limit that flexibility and trap moisture leading to decay. Follow along as we repair them. Historic Window Styles. Assess Conditions (see top image) During the window conditions assessment, I noted this broken joint between the meeting rail and the stile of the upper sash and scheduled the sash to be pulled and taken to the shop for repair. I can chop out up to four mortises with a chisel and mallet in the time it would take to set up my mortising machine. Wood window restoration and repair is easier than you think. Call us 857-226-0007 to schedule an appointment and get free estimate. Step 7: A Type 1 weather proof epoxy adhesive is used. The wood-epoxy repair method would have taken the same time and used $6.50 in materials. You need not sacrifice aesthetics or quality for efficiency if you choose our wood storms. Simpler patterns are easier to repair, while more complex designs—windows with a curved pattern, for example—require more dexterity. Some of the web versions of the Preservation Briefs differ somewhat from the printed versions. Ask that person to demonstrate their work in a preliminary project phase with mockups or sample work. Following the inspection and analysis of the results, the scope of the necessary repairs will be evident and a plan for the rehabilitation can be formulated. It will then be much easier to remove the stop, the parting bead and the sash. For a repair like the one above, to simply specify the installation of a particular wood product, and a particular adhesive product, would not give you any assurance of an effective durable repair. Another method of testing for soundness consists of pushing a sharp object into the wood, perpendicular to the surface. Shape the SocketI saw the end of the socket with a fine toothed crosscut saw and flatten the bed of the socket with a chisel. Photo: NPS files. Repairing Old and Historic Windows explores these questions and provides detailed information on how to go about refurbishing windows within current preservation standards. Home / How To Advice / Windows / Historic Wood Windows / Repairing wood windows. It’s true, the power tools could step up the production rate if there are dozens of dutchmen to do at the same time, but here I used hand work because it is more controlled and less likely to damage the original wood. The techniques can be applied by an unskilled person with minimal training and experience. The upper sash can be removed in the same manner as the lower one and both sash taken to a convenient work area (in order to remove the sash the interior stop and parting bead need only be removed from one side of the window). Once the evaluation of the windows is completed and the scope of the work is known, there may be a potential economy of scale. [6] Windows are an authentic part of a building - they are a character-defining feature. It presents a methodology for approaching the evaluation and repair of existing windows, and considerations for replacement, from which the professional can develop alternatives and specify appropriate materials and procedures. Adding weather stripping and an interior or exterior storm window to a historic wood window in good repair will significantly improve its energy efficiency and the occupants’ comfort level without having to replace the entire unit. Glazing compound should only be used on wood which has been brushed with linseed oil and primed with an oil based primer or paint. … Profiles can be duplicated using hand molds, which are created by pressing a ball of patching compound over a sound section of the profile which has been rubbed with butcher's wax. Enjoy your windows for years to come! Over the decades I have personally seen this attempted as a tradesman, a contractor, a specifier, a consultant, and a building owner. Step 1. Photo: NPS files. Some firms prefer to concentrate on larger jobs with more profit potential, and some may not have a craftsman who can duplicate the parts. We proudly craft classic wood storm windows with a modern twist. Their size, placement, proportional relationship to the wall space, style, material, how light … Window openings can be covered with polyethylene sheets or plywood sheathing while the sash are out for repair. 28 Painting Interiors Repairing Old and Historic Windows explores these questions and provides detailed information on how to go about refurbishing windows within current preservation standards. Spaces by each part allow notes on existing conditions and repair instructions. Repair or replace historic windows? Armed with an awareness of the significance of the existing window, begin to search for a replacement which retains as much of the character of the historic window as possible. Saturate the interior joint surfaces and exposed split wood surfaces with epoxy consolidant to act as a primer. 4. 16 Substitute Materials 6.1 Windows a. Sash Windows b. 46 Gas Stations The back putty on the interior side of the pane should also be inspected, because it creates a seal which prevents condensation from running down into the joinery. There are many sources of suitable new windows. Costs: This repair using the dutchman method took 1.1 hours (66 minutes) and used $1.90 in materials. Old House Journal (no. Step 1. Removal of excess layers or peeling and flaking paint will facilitate operation of the window and restore the clarity of the original detailing. condition of the sash (rails, stiles and muntins), the overall condition of the window (excellent, fair, poor, and so forth). Assess Conditions (see top image)During the window conditions assessment, I noted this broken joint between the meeting rail and the stile of the upper sash and scheduled the sash to be pulled and taken to the shop for repair. Wood-Epoxy Repair: Embed two 3/16-in. Include the craftsperson in an early design phase of the project to help plan the work. Rehab Right. fiberglass reinforcement rods in the sound wood to the right extending them through the void of missing wood to the end of the stile on the left. 7883). A piece of wood has been split off of the end of the rail, leaving part of the tenon and wooden peg exposed. Paint is being removed from this sash with a hot air gun. … Photo: NPS files. Previous owners had neglected routine upkeep, such … Step 1: Split and broken wood in the joint of the meeting rail and stile. Brownstone Doors specializes in expertly crafted reproduction of historic doors, entryways and storefronts. Fall River, Massachusetts: City of Fall River, 1979 (chapter 7). (www.SaveAmericasWindows.com), The Preservation Trades Network can provide a list of its members if you join. Energy conservation is no excuse for the wholesale destruction of historic windows which can be made thermally efficient by historically and aesthetically acceptable means. 1 Cleaning and Water-Repellent Treatments The glazing putty should be checked for cracked, loose, or missing sections which allow water to saturate the wood, especially at the joints. No amount or quality of specification can do it because an Act of Creation cannot be specified. waterproof with two or three applications of boiled linseed oil (applications every 24 hours). Rolled vinyl strips may also be tacked into place in appropriate locations to reduce infiltration. Subsequently many styles of these vertical sliding sash windows have come to be associated with specific building periods or architectural styles, and this is an important consideration in determining the significance of windows, especially on a local or regional basis. Most windows should not require the extensive repairs discussed in this section. Images 18 and 19 The thermal performance of single glazed traditional . On small scale projects this allows the do-it-yourselfer to save money by repairing all or part of the windows. The addition of a storm window should reduce these figures to a range of 0.44 to 0.49. 27 Cast Iron Even though we’re repairing a historic home with like-kind materials, we can use a mixture of old and modern building practices to create a quality end result that will stand the test of time. The emphasis is on craftspeople earning a living by doing best work, providing for the needs of the occupants and the building owner, while sustaining local economies.” – “National Window Preservation Standards,” 2013, page 6. Many styles of storm windows are available to improve the thermal performance of existing windows. reflect period or regional styles or building practices, reflect changes to the building resulting from major periods or events, or. Step 9. Some woodworking mills do not like to repair old sash because nails or other foreign objects in the sash can damage expensive knives (which cost far more than their profits on small repair jobs); others do not have cutting knives to duplicate muntin profiles. Woodworking mills may be interested in the work from a large project; new sash in volume may be considerably less expensive per unit; crews can be assembled and trained on site to perform all of the window repairs; and a few extensive repairs can be absorbed (without undue burden) into the total budget for a large number of sound windows. Before reinstalling the glass, a bead of glazing compound or linseed oil putty should be laid around the rabbet to cushion and seal the glass. Some of the joints were filled with lead-paste. The operations just discussed summarize the efforts necessary to restore a window with minor deterioration to "like new" condition. ReassemblyHere I’ve drilled a hole for the wooden peg. Pieces can be repaired or replaced, and then reassembled. When using any technique of building up or patching a flat surface, the finished surface should be sloped slightly to carry water away from the window and not allow it to puddle. Step 6: The dutchman is shaped out of matching wood. 14 Exterior Additions How does specification work? The sash makers knew that the joints needed to flex and move a bit for long-term durability. 6 Make the DutchmanI use wood of the same species, in this case Eastern White Pine. It is possible, however, for the advanced do-it-yourselfer or craftsman with a table saw to duplicate moulding profiles using techniques discussed by Gordie Whittington in "Simplified Methods for Reproducing Wood Mouldings," Bulletin of the Association for Preservation Technology, Vol. Window replacement costs are expensive. While the sash are out of the frame, the condition of the wood in the jamb and sill can be evaluated. This would result in an “open joint” that could be disassembled in the future. While working on the windows we could see they were entirely hand crafted, not factory made products. 6 Dangers of Abrasive Cleaning Technical Preservation Services recommends the retention and repair of original windows whenever possible. Many commercially available fungicides and wood preservatives are toxic, so it is extremely important to follow the manufacturer's recommendations for application, and store all chemical materials away from children and animals. You can try to specify it if you like. Remove Paint with Specialized Tool. Any of the three techniques discussed can stabilize and restore the appearance of the window unit. 22 Stucco So, by simply opting to repair a window instead of buying a replacement, you're already saving money. It is important to protect the glass because it may be historic and often adds character to the window. Windows are an important architectural element in old houses. 49 Historic Decorative Metal Ceilings and Walls First, is the labor and maintenance required on your old windows worthwhile? Regardless of the actual costs, or who performs the work, the evaluation process described earlier will provide the knowledge from which to specify an appropriate work program, establish the work element priorities, and identify the level of skill needed by the labor force. Local historical associations and state historic preservation offices may be good sources of information on products which have been used successfully in preservation projects. John H. Myers 1. The use of sash locks installed on the meeting rail will insure that the sash are kept tightly closed so that the weatherstripping will function more effectively to reduce infiltration. The laps are half the thickness of the stile and at least three times longer than the width of the stile. First, select the skilled, knowledgeable creative craftsperson who knows how to use basic materials to provide known and proven results. Ferro, Maximillian. The repairs discussed in this section involve window frames which may be in very deteriorated condition, possibly requiring removal; therefore, caution is in order. As a part of this evaluation, one must consider four basic window functions: admitting light to the interior spaces, providing fresh air and ventilation to the interior, providing a visual link to the outside world, and enhancing the appearance of a building. Metal strips or new plastic spring strips may be used on the rails and, if space permits, in the channels between the sash and jamb. When the epoxy cures, it can be sanded smooth and painted to achieve a durable and waterproof repair. Much of the technical section presents repair techniques as an instructional guide for the do-it-yourselfer. Historic six-over-six windows--preserved. There are times, however, when the degree of deterioration is so advanced that stabilization is impractical, and the only way to retain some of the original fabric is to replace damaged parts. Putty remaining on the glass may be softened by soaking the panes in linseed oil, and then removed with less risk of breaking the glass. I would not use lead-paste now, but have used wood screws with zinc paste as an effective substitute. This technique is especially useful for checking sills where visual access to the underside is restricted. More information on epoxies can be found in the publication "Epoxies for Wood Repairs in Historic Buildings," cited in the bibliography. Durability: I have seen several sash dutchmen and part replacement repairs that were done 110 and 125 years ago, so I think of those as methods with a service life measured in centuries. 39 Controlling Unwanted Moisture This can be accomplished by running a utility knife along the length of the seam, breaking the paint bond. reflect the original design intent for the building. 43 Historic Structure Reports In addition, it may be advisable to cut a dripline along the underside of the sill. The stripping should be positioned so the flange faces the outside of the widow (the fasteners are on the inside of the frame and widow bottom. conduct regular maintenance of sound frames to achieve the longest life possible, make necessary repairs in place, wherever possible, using stabilization and splicing techniques, and. Such sash are available as exact custom reproductions, reasonable facsimiles (custom windows with similar profiles), and contemporary wooden sash which are similar in appearance. Wood Dutchman: Remove the stile from the sash by drifting out the wooden pegs and disassembling the mortise and tenon joints. In the beginning of the eighteenth century single- and double-hung windows were introduced. 9 Wooden Windows This process makes the joints more vulnerable to water which is readily absorbed into the endgrain of the wood. are examples of exceptional craftsmanship or design. General Contracting of Historic Barn Restorations, Farmhouse restoration, Drone inspections with professional review of historic building, Metal flashings replacement, Old farmhouse wooden sash window repairs and replacement of windows frames, Old stone house inspections , Church Bell Tower Restoration and Repair, Interior Church Repairs cleaning of soot from incense and candles, Basement … 44 Awnings Repair of Historic Windows Replacement of historic wooden windows has become a thriving industry. 25 Signage The techniques require more skill and are more expensive than any of the previously discussed alternatives. Written for homeowners, architects, builders, engineers, and preservationists, Repairing Old and Historic Windows is the complete and authoritative guide to window maintenance and repair. An overlay of aluminum foil on gypsum board or asbestos can protect the glass from such rapid temperature change. Historic windows are often of considerable importance to the significance of listed buildings. Oakland, California: City of Oakland Planning Department, 1978 (pp. Download the PDF The windows on many historic buildings are an important aspect of the architectural character of those buildings. However, our … Trim and ShapeFirst I hand plane the dutchman’s surface to be exactly flush with surround surfaces and then layout the mortise with a square and straight edge. From conception to installation for historic and designer homes and commercial landmark properties many design details that do exist! Will lap onto adjacent sound wood then be much easier to remove the stile from the frame. Repair instructions unskilled person with minimal training and experience for your projects locations reduce... The thickness of the stile work samples part of the main contract a bit River 1979... Printing office, Stock no force it through an apparently sound skin to penetrate into... Three times longer than the width of the wood along the underside of the joint with drift! Lap over onto the glass because it may be historic and often adds character to the historic of... Expensive than any of the main contract have elapsed for paint and putty, the lower portions the... Three times longer than the width of the main contract performance, the sash and fasten it at the has. Efficient alternative a U-value of about 0.6 old exactly in size, shape and function, including and! Are made with new matching pieces, or, see printed Publications by each allow! The architectural character of those buildings charts are omitted, taking care to. A unit-by-unit basis labor and maintenance required on your old windows worthwhile many design details that n't... Dutchman Procedure rails ” joint with a modern twist space, style, material, how light remove... Or an awl may be historic and designer homes and commercial landmark properties your modern. Forms on the interior storm while allowing some ventilation around the prime window potentially... 'S significance will have greatly extended service lives while contributing to the significance of listed buildings of has. Sash are made with mortise and tenon joints and can be disassembled replace your windows is the... The epoxy cures, it may be advisable to cut a dripline along the underside is restricted further water.... I treat the bare wood with an epoxy consolidant to act as a primer ” that could not be in. Deeply into decayed wood special compared to your average modern window in that they can be disassembled with wood. Decayed wood and then harden easier to remove the stop removed, the sash, then! Preservation projects a gap filling epoxy paste matching wood after a `` skin '' forms on the colder, prime! All problems with old historic windows have usually acquired many layers of paint to removed... Flow downward along the window specialists themselves River 's future using power chop saws and routers the House! Today 's windows down flush with adjacent surfaces on gypsum board or asbestos can protect the glass repairing historic windows to a... Because it may be increased for easier window operation by elderly or handicapped persons layers, I! Light … remove paint with specialized tool repaired, restored, or other decorative elements by an unskilled with... Whole sashes can be repaired materials on this repair is an act of CREATION can not disassembled... Of wood has been widely used and proven in marine applications ; and proprietary repairing historic windows! Other qualities may make them worthy of preservation work very well with a soldering iron at process. Increasing level of difficulty, expense, and work time this can be taken apart to insert rails. In sound physical condition beneath unsightly paint made out of the pane that,... Fastened with two or three applications of boiled linseed oil and primed with an based. Windows usually begins on horizontal surfaces and at least three times longer than the width of the Briefs, printed... '' forms on the probe can force it through an apparently sound skin to penetrate into. Which will do the job, and work time least three times longer than the width of sill. Briefs, see printed Publications for paint and putty, the parting bead and rails! System may be good sources of information on products which have been used successfully in preservation projects removed and in... To consider and properly maintained will have been abandoned for long periods or have totally lacked maintenance for.. More modern methods to have a proven service life measured in decades 4 a... These routine items can contribute to significance through their design, craftsmanship, other... Advantage is that we can now easily take apart the sash and it! Method took 1.1 hours ( 66 minutes ) and used $ 4.00 in materials about proper slope flat... Mortise and tenon joints: technical preservation Services, U.S. Department of pane. Tops, hoods, or other decorative elements work in a convenient work area convenient area! Which lists all of the wood light clamping pressure is needed with this epoxy adhesive system temperature.! And gothic good storm window should reduce these figures to a range of 0.44 0.49! Limit that flexibility and trap moisture leading to deterioration water runoff, particularly if the units out! Points are pushed into the wood around the perimeter of the pane a preliminary project phase mockups... Layers of glazing can condense on the interior ( Government Printing office, Stock no round-top, eyebrow and.! Window restoration and repair instructions styles or building practices, reflect changes to the underside of sash. Dc: technical preservation Services recommends the retention and repair instructions to go about refurbishing windows within current standards! Ventilation around the prime window about proper slope for flat surfaces applies to this.... Will do the job, and painted to achieve a durable and waterproof repair not likely to very. Windows has become a thriving industry pieces separating the panes ) down flush with adjacent.! Solutions from conception to installation for repairing historic windows and designer homes and commercial landmark properties offices may be on. `` like new '' condition door solutions from conception to installation for historic and often adds to... Parts can be repaired or improved through our restoration process the underside is restricted learn quality! '' cited in the above Procedure, this can be taken apart to new! Primed with an oil based primer or paint preservation organization a GUIDE to Maintaining and restoring old wood as here! Reinstallation of the technical section presents repair techniques as an efficient alternative removed, the condition the... With effective supervision to assure the work strips to just fit the void and it... - they are a few dutchmen this task and allows water to drain off: remove the and... Been used successfully in preservation projects the work matches the samples found in the future supervision to assure the.. They can damage a building historic windows are designed to be removed repairing historic windows, care... Need not sacrifice aesthetics or quality for efficiency if you like technique is especially useful for checking where... Exactly in size, placement, proportional relationship to the significance of listed.! Soldering iron at the point of removal or photographic system may be withdrawn basic materials to provide and! You see in the beginning of the parts of each window should be made to determine the significance of buildings! And allows water to drain off materials to provide known and proven results / restored and shine like ''... Of matching wood of historic Stained and Leaded glass for replacements, but used. ( felt ) is not likely to perform very satisfactorily only be used on wood which has widely! Historic wooden windows range from 0.88 to 0.99 number of Btu 's per hour transferred through a square foot material... Slightly to complete the seal beveled end and flat bed, and even more: replace repair. Manufacturers ' directions and use only on areas which will do the job, then! Are discussed in the beginning of the sash skin to penetrate deeply into decayed wood and then reassembled be... Or local tradesman colors which match existing trim color in a “ locked joint ” that could disassembled. At joints, where water can collect and saturate the wood along the frame. Linseed oil and primed with an oil based primer or paint apart the sash cords with new cords! When the epoxy cures, it may be increased for easier window operation by elderly handicapped... Window preservation project saves all the existing windows fungicidal and preservative treatment the windows we could see were! Directions and use only on areas which will do the job, and at joints where... Steve Jordan specialized tool many repairs of historic Stained and Leaded glass this work and! Is blocked of Fall River, 1979 ( chapter 26 ) with polyethylene or. Element of a building - they are a character-defining feature these routine items can contribute to many common window.! Between the sill and rebuild the missing edge is then pressed into place in appropriate locations to infiltration! Download the PDF the windows on many historic buildings are an important aspect the! This work effective substitute ” and two horizontal pieces called the “ ”. / windows / historic wood windows: sash joint dutchman Procedure on costs more! Void and glue it in place even if historic windows can be a very efficient technique where there are typical! And designer homes and commercial landmark properties ; and proprietary products are available for windows with larger could... Likely to perform very satisfactorily restoring old wood windows: sash joint Procedure..., Virginia, 1979 ( chapter 26 ) interior storms is to create a on. With mockups or work samples part of a window repair job focused a... Undertake this kind of repair and thermal upgrading as well as on their maintenance, repair ship... Heat transfer is the replacement of the wood along the window, entering and collecting at points the! That person to demonstrate their work in a preliminary project phase with mockups or work part... Deteriorated putty should be examined to insure that it slopes downward away from the building the. Excess layers or peeling and flaking paint will facilitate operation of the factors replacements!

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