Comments on: Window Sealant Failure http://chicagowindowexpert.com/2009/03/28/types-of-window-leaks-sealant-failure/ Nobody knows more about windows. Thu, 29 Jul 2010 20:19:50 -0400 http://wordpress.org/?v=2.8.6 hourly 1 By: Susan http://chicagowindowexpert.com/2009/03/28/types-of-window-leaks-sealant-failure/comment-page-1/#comment-407 Susan Tue, 12 Jan 2010 00:27:30 +0000 http://chicagowindowexpert.com/?p=275#comment-407 Hi Mark, Thank you for your very informative site! I'm trying to resolve an issue of interior caulk cracking on vinyl slider windows that were installed in the last few months in my third floor condo home. The cracks are most apparent when sun is hitting the windows (worse vertically than horizontally). The installer has agreed to remove the DAP non-silicone caulk used in installation, replace it with the window manufacturer recommended more flexible OSI QUAD caulk, and add an additional screw to each of the sides of the windows to make the windows more secure and limit the magnitude of the thermal expansion. The largest window is 81" wide by 57" high. The other windows are 37" wide by 57" high. Do you have any recommendations? Thanks! Susan P.S. I will e-mail you a image showing the cracking of the DAP non-silicone caulk and the OSI QUAD technical data sheets. I am also going to try to inspect the exterior silicone caulk application for adherence to the vinyl of the windows as I understand from your site how critical that is. Hi Mark,
Thank you for your very informative site!

I’m trying to resolve an issue of interior caulk cracking on vinyl slider windows that were installed in the last few months in my third floor condo home. The cracks are most apparent when sun is hitting the windows (worse vertically than horizontally). The installer has agreed to remove the DAP non-silicone caulk used in installation, replace it with the window manufacturer recommended more flexible OSI QUAD caulk, and add an additional screw to each of the sides of the windows to make the windows more secure and limit the magnitude of the thermal expansion.

The largest window is 81″ wide by 57″ high. The other windows are 37″ wide by 57″ high.

Do you have any recommendations?

Thanks!
Susan

P.S. I will e-mail you a image showing the cracking of the DAP non-silicone caulk and the OSI QUAD technical data sheets. I am also going to try to inspect the exterior silicone caulk application for adherence to the vinyl of the windows as I understand from your site how critical that is.

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