Repairing Windows

April 13th, 2010 - Posted by RESNET under Windows

Energy efficient windows are very important for keeping your energy bills from being higher than necessary, conserving energy and increasing the comfort of your home. If replacing your windows is not economically possible, you can improve the energy efficiency of your existing windows by installing:

  • Storm windows
  • Weather stripping and caulking
  • Coverings and exterior or interior shading devices such as awnings, screens, blinds, drapes, etc.
  • Window films (for cooling purposes)

Storm Windows

Storm windows are an inexpensive alternative to new replacement windows. They will not only protect the primary window from possible storm damage, they also cut down on energy losses and reduce air leakage.

Storm windows are particularly suited for old homes, apartments and historic homes to improve efficiency and realize energy savings without large investment and without altering the home’s appearance. They can be installed on either the interior or exterior of old windows, to aluminum, wood or vinyl frames. Interior storm windows are often preferable. The drawback to storm windows is that they will require some work to install, can be a cause of condensation (when installed over exterior windows) and have no insulation value.

Weather Stripping and Caulking

Adding weather stripping and applying caulk to gaps will greatly reduce drafts and air leakage from the windows in your home. Small gaps in your windows can cause substantial energy loss. Caulking around your windows is equally important to eliminate drafts, energy losses and air leakage.

Window Films

Applying window films is a fast and very inexpensive solution for keeping your home cool during hot months. Many benefits of solar-control glazing can be achieved by applying films to non-efficient windows. Window films are laminates of polyester and metalized coating bound by adhesives and are capable of isolating and rejecting invisible infrared and ultraviolet radiation and corresponding heat. They are usually attached to the interior of existing windows, skylights and glass doors.

When selecting the film, choose the one with higher VT (visible transmittance, which is a measure of the amount of visible light passing through your window or glass doors) and lower SHGC (solar heat gain coefficient – a measure of heat admitted through a window of door).

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  • D Mill

    Another window to consider is basement windows. Rather than replacing them, you can cover them with Plexiglas. I would clean and repaint if needed the window frame. Then I would use silicon sealant to glue the Plexiglas in place right to the frame. Just set in two small nails in the bottom to set the Plexiglas on so it will not slide off while the silicon cures. You will find that this fix will save you energy cost and is cheaper to do than replacing the windows.

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