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-   -   How to seal corner of 2 stand up walls - not reachable from the outside (https://www.askmehelpdesk.com/showthread.php?t=83818)

  • Apr 18, 2007, 12:11 AM
    WithAK
    How to seal corner of 2 stand up walls - not reachable from the outside
    I am building a room in my backyard on a slab a mere 5 1/2" from the block walls on 2 sides. I'm planning on building those 2 walls (15' by 6' and 8' x 6' sloping to 7') on the floor, with Tyvek (or ?) then prefinished siding, then lifting them onto the bolts.
    My dilemma is how do I seal that corner?

    Any recommendations on the unseen siding (vinyl, cement, aluminum, ).
    Any unforeseen problems here?

    Thanks in advance.
  • Apr 18, 2007, 12:18 PM
    Kstar4u
    Are the corners of the new walls (at the exterior side) going to be flush with the corners of the existing structure? If so... maybe you can add a piece of trim that will overlap the existing wall by a few inches and before you set the new wall in place... apply a generous amount of silicone sealant to the trim so that when you pull the new wall snug with the existing wall, it creates a seal. Also... I would suggest injecting some expanding foam insulation from the inside of the new wall along the edge that abuts the existing wall.

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