Avoiding Window Leaks

These days a lot of homeowners are replacing their old windows with vinyl windows using the retrofit style of window frame. This is particularly true in the west. The number one argument that I have heard against using the retrofit method, is that it is susceptible to water leaks.
That's true if you don't do it properly. But, if you do a complete tear out of your old window down to the studs, you're going to have water leak issues there as well if you don't install the new window properly If you are installing retrofit frames against a stucco house, you want to put a thick bead of sealant right on the outside face of the old window frame, all the way around. Latex caulk should work fine, but if you want to spend a little more to get the best sealant available, use 100% silicone. Depending on the number of windows you will be doing, this extra cost can add up. You pay approximately $1 for a tube of acrylic latex caulk, and $4 or more for a tube of 100% silicone. You are going to use 1-3 tubes per window, depending on the size. So you can see how it could add up.
Here is a trick to save a little money; The most vulnerable part of your installation is the top of the window, because gravity will have the water running down from the roof to the ground. It's not likely that water is going to find it's way through the sides or bottom. So, carry two caulking guns, and load one with the silicone, and the other with the acrylic caulk. Run the silicone across the top of the old frame, and caulk the sides and bottom. Then, put your new window into the opening and have a helper hold it firmly in place while you plumb and level it, then screw it into place. After you have the window completely installed, your final step should be to caulk where the retrofit lip meets the stucco You now have a double barrier against water infiltration. After about a week, check the sealant around each window for signs of cracking. Because stucco is usually uneven, there could have been gaps that were larger in some areas than in others. If you don't force the caulk into the gap to completely fill it, the caulk can sag before drying, causing a crack to form. Simply recaulk over any cracks that you see. You can check the silicone on top as well, but because silicone dries like a rubber substance, you shouldn't see any cracks there.

I pull out all the stops to sell your home.
Lonnie Snyder
REALTOR ®
Keller Williams Realty Southeast Sound
Phone: 206-406-2710

Lonnie Snyder is a full time real estate agent and REALTOR® with Keller Williams Realty specializing in Residential Real Estate for buyers and sellers in Washington's Kent, Renton, Newcastle and South Bellevue.

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