+ Reply to Thread
Results 1 to 3 of 3
  1. #1
    Join Date
    Mar 2011
    Posts
    1

    Default Flashing new construction window in conrete foundation

    I have new construction windows that are attached to a concrete foundation via the PT lumber used to frame the inside of the opening.

    The windows are fine but the trim and part of the framing have rotted out and the flashing is non-existent. The builder used pressure treated lumber to frame the opening in the concrete, OSB to fir out the window opening and just some caulk around the trim.

    Now its all just rotted away. I made a piece of flashing to protect the top of the window and attached it with silicone as a temporary measure.

    My question is: How do you flash a window mounted in a concrete foundation so its water tight?

    I'll try and resize the pictures so they can be attached.

  2. #2
    Join Date
    Mar 2009
    Posts
    1,387

    Default Re: Flashing new construction window in conrete foundation

    the "z" flashing for the top of the window should of been installed in wet concrete.. haha- Actually a renovating window that has no tabs (verses a new construction) vinyl clad window installed with a 50 year premium caulking would be better and if you trim the window with PVC trim no rottttttt

  3. #3
    Join Date
    Mar 2008
    Location
    nova scotia, canada
    Posts
    1,522

    Default Re: Flashing new construction window in conrete foundation

    precisely as just mentioned. lining the opening with vycor first also helps also setting hte pt further back in the opening can create protection.

    your other option is to bring the window further out to the face of the foundations then remove the siding directly above so you can install flashing up under the siding. this only works however when the opening is right at the top of the foundation wall where the floor system creates the window header
    fire up the saw and make some dust

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •