Which Types of Window Sills Can I Install With Vinyl Windows?

Inspection

• The first step you need to take when installing your vinyl windows is to inspect the entire area around the window opening, including the window sills themselves. You need to look for signs of wood rot or moisture damage that could cause a potential installation problem or a long-term maintenance problem for your windows. If you find that a significant amount of wood rot or decay has occurred, you can either choose to replace the existing window jamb and sill or repair it. You do not need to have a particular type of window sill when installing vinyl windows.

Repair

• Repair of the existing window frame and sill is the simpler of the two options you have at your disposal. Window sills and frames can usually be repaired by first cleaning the decayed wood using a steel wool pad and some sandpaper. You can then apply a high quality epoxy sealant. When determining whether to repair the window jamb and sill, assess the overall damage and use that as the basis for your decision. A significant amount of damage can require that you replace them. If the damage is minimal, a repair is likely to be in order instead.

Replacement

• Replacement of the window sill is often connected to the replacement of the window jamb, so doing one might necessitate doing the other. Replacing these involves a significant amount of work. To replace a frame and sill, pry away the existing jamb and sill carefully with small crowbar. If these are held in place with screws rather than nails, remove these first to make your work a little easier. Replace the existing sill and jamb with your replacement materials, screwing them securely into place. Carefully measure each piece and opening beforehand to ensure a perfect fit.

Finishing

• You can use either a wood or vinyl sill to replace your old sill. One of the advantages of vinyl replacement windows is that they are made to slide right into your existing opening and can be adapted to fit just about any type of window. In many cases, the existing sill can be left intact. Many times, the decision to change the sill is related to the difference in look between the old sill and the new window itself. A wooden sill might not go well with a white vinyl window. You might need to consider painting the existing sill or re-staining it to meet your aesthetic requirements for the replacement windows.