Following the Secretary of the Interior's "Standards for Rehabilitation", Leeds Clark has developed a turn-key historic wood window restoration service based on tested and proven methodologies and restoration products. With over 30 years experience, Leeds Clark is confident that no other firm will rate as high in timely completion and within budget, while providing the craftmanship and expertise expected in historic wood window restoration. Below is the prefered methodology Leeds Clark incorporates into historic wood window restoration projects:

Pull the window sashes from the window jambs and number according to the window opening on the floor plan. Window number and elevation will be stamped onto each window sash to prevent mix-up of sashes.

Cut and install OSB plywood to cover the window openings during window restoration work. Plywood will be installed from the interior to butt against outside stop of upper sash track and secured to jamb using 1 ¼" drywall screws. Plywood will be cut into 60/40 lengths allowing upper piece to overlap lower piece to the exterior; this prevents water infiltration at the joint line. Since plywood is located at the outer portion of jamb, rain water will drain to outer portion of wood sill and not penetrate the interior of building. This type of plywood installation also allows for daily removal and re-securing during window jamb preparation and rehabilitation. The lower section of plywood section can be removed for natural light and air ventilation at any time.

 

 

 




Wood Window Sash Restoration

Transport window sashes to off-site shop facility for chemical dipping in neutral PH stripper for the removal of paint and glazing compounds in a controlled environment. As of April 22, 2010, a new law governing renovations that contain lead paint became effective. Aimed at protecting against lead-based paint hazards, the EPA’s new rule applies anytime a lead paint surface is disturbed by renovation or painting projects, including repairs, maintenance, electrical, plumbing, carpentry, demolition, and window restoration / replacement. The rule also requires renovation firms to be certified by the EPA, and that they assign at least one EPA Certified Renovator to the job to ensure that lead-safe work practice standards are observed. Leeds Clark Inc. is an "EPA Certified Firm", and both Tom & Chris Clark are "EPA Certified Renovators". Go to www.epa.gov/lead for additional information about the new EPA rule and other Lead Programs. Leeds Clark is not a licensed or insured asbestos abatement contractor.


 

 

 

 

 

 

 

Salvage as much historic glass as possible for re-use in window sashes.

Perform epoxy and dutchman repairs, replace missing window sash components, or mill replacement window sashes, where designated, using vertical grain old growth lumber that is called for in the specifications. Wood will be seasoned with a moisture content not to exceed 11% and free of any knots or checks. Match historic profile of window sash.

Sand all window sashes and seal end grain of sash components with epoxy. Apply one coat of approved latix primer to all window sash components, unless the interior of the window sash is to recieve a stained finish.

Re-install historic glass in window sashes and replace any broken or missing glass with 1/8" clear (DSB) annealed glass. Back-glaze units using a clear siliconized acrylic sealant. Apply push points to seat glass against sealant and allow time for curing. Glaze window sashes using oil based glazing compound and allow glazing putty time to cure prior to application of finish paint. If approved, beveled wood glazing trim (using same lumber called for in the specifications) can be used in place of glazing compound.

Apply two coats of approved finish paint to all window sash components, unless the interior of the window sash is to recieve a stained finish.

Transport restored window sashes back to jobsite for installation.

 

 

 

 

 

 

 

 

 

 

 

 



Wood Window Jamb Restoration

Remove brick molding from outside perimeter of jambs and stamp according to window number and elevation. Chemically strip paint from brick molding at an on-site staging area or off-site at shop facilities. Remove any caulking or paint from perimeter masonry. Remove parting stop from existing jambs; parting stop will be double-wrapped in poly plastic prior to disposal.

Strip paint from window jambs (on site) using neutral PH based chemical paint stripper. Care will be taken to mask and contain all removed materials for proper disposal. Leeds Clark Inc. is an "EPA Certified Firm", and both Tom & Chris Clark are "EPA Certified Renovators". Go to www.epa.gov/lead for additional information about the new EPA rule and other Lead Programs. Leeds Clark is not a licensed or insured asbestos abatement contractor.

Replace window jamb components where wood rot or structural stability is in question using old growth lumber that matches in species and graining. Specified wood will be seasoned with a moisture content not to exceed 11% and free of any knots and checks. All replacement jamb components will be primed and the end-grain sealed with epoxy prior to installation.

Epoxy all checks and voids on window jamb where minor defects or surface deterioration exists such as sills, stool, and lower jamb areas where joinery connects to sill. Prep and sand all window jamb components prior to painting

Re-install salvaged brick molding or replicated brick molding . Caulk all wood to wood joints using a siliconized acrylic latex sealant and all exterior surround joints of brick molding and sill to masonry using a one-part urethane sealant.

Prime all window jamb components, stools, and aprons with approved latex wood primer and apply two finish coats of paint as specified.





 

 

 

 

 

 

 

 

 

 

 

 

 


Wood Window Sash Installation

Clean and restore salvaged window hardware including rope/chain, pulleys, weights, sash lifts and sash locks. Provide new window hardware where missing, matching the original as close as possible. Submittals will be provided to architect/owner prior to installation.

Install restored window sashes in restored window jambs. It will have been determined prior to installation as to whether the sashes are to be fixed in a closed position, fully operable, or have a fixed upper and operable lower. If the operable sashes are to recieve weatherstripping, submittals will be provided to architect/owner prior to window sash and weatherstripping installation.

Install salvaged and/or new window sash lifts and sash locks.

Clean window glass prior to acceptance by architect /owner.

Complete any punch items submitted by architect/owner.

No two wood window restoration projects are the same. Tom Clark believes inspection of the historic wood windows and its components is vital in developing an historic window restoration plan. Condition assessment of the wood windows helps the architect/owner establish needs, offer realistic solutions and specifications, then develop a plan and budget to determine feasibility of the proposed project.


 

 

 

 

 

 

 

 

 

 

 




For inquiries on Leeds Clark's wood window restoration services, email: info@leedsclark.com