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How we repair Victorian windows using approved methods and materials

DOUBLE-HUNG WINDOW RESTORATION

Antique Victorian Double-hung Wood Window Repair Contractor in San Francisco

what parts of a Victorian window most commonly require repair

Diagram of the parts of a traditional  double-hung Victorian window.

wooden window repair and restoration techniques

An upper sash. This is how to repair the decayed wood in this rotted Victorian window sash; by replacing the meeting rail entirely.

repair vs. replacement of antique Victorian wooden windows

This is the best way to repair a drafty arched antique Victorian window; by adding wood to the top of the sash.

How to repair a drafty old Victorian window

To reduce drafts in antique Victorian windows we install traditional bronze weatherstrip.

Don't replace; restore!
Double-hung windows have two sashes that slide up and down past one another. Frequently, we will find a home in which the upper sash in every window has been painted shut. This has led many to believe that they have single-hung windows, however in the last fifteen years we have never encountered an antique single-hung window of this configuration in San Francisco.
 
Double-hung windows with traditional weight and pulley systems are the most durable and most serviceable type of window. These windows come apart to replace sash-cords (ropes). The double-hung design, created to facilitate easy cleaning of the outside of the glass, also allows for free air flow while promoting child safety. When both the upper and lower sashes open and close freely, a person can not only open the upper window for venting the kitchen or bath, but it is now possible to easily wash both sashes from within the building simply by sliding the two panes to different positions.
 
The following are examples of services we commonly carry out in an (original) wooden window restoration project of an entire Victorian house or flat

  • Onsite visit to assess original window parts

  • Remove sashes; smooth at edges where parts travel by one another for smooth operation

  • Cut/plane/add to edge(s) of 2 sashes to accommodate altered shape of window opening d/t settling of building

  • Replace 4 sash-cords per window (ropes)

  • Replace specific sections of cracked or missing glazing compound (putty sealing glass pane)

  • Replace 1 cracked pane(s) of glass in 1 window

  • Free-up 1 pulley to turn freely

  • lubricate pulley and wooden parts to pass smoothly by one another

  • Repair 4 sashes with wood preservation products

  • Repair 1 window jamb (frame) where cracked at window sill

  • Replace sash-locks

  • Install bronze weatherstrip, 4 edges in all windows

  • Replace 1-2 piece of window-stop (wooden molding that guides sashes)

  • Replace 2 sashes with new custom sashes to match originals

  • Work is carried out 1 window at a time per worker (security)

  • No window will be left unattended as work is carried out

  • All window parts will be reinstalled by the end of each day and secured against forced entry, rain and drafts

 
How we repair old drafty windows that rattle varies from one house to the next and, frequently from window to window. In general, Victorian buildings here have settled, often significantly. While we have a window apart we use a hand plane to create an optimal fit along the top and bottom edges of sashes to create a tight fit and to reduce drafts. To further reduce drafts as well as street noise, we install a traditional bronze weatherstrip. As we reassemble each window, we work carefully to fit things together tightly as best possible while allowing windows to open and close smoothly.

 

 

 

 

Before and After Door Repair
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