Siga Tape | Sealing Walls to Foundation

[@eugenel4394]

I absolutely love the Siga tape. Matt Risinger was the builder than first introduced me to it. I use Siga Fentrim for exterior sheathing to foundation, Siga Wigluv to tape sheathing seams, Siga Corvum and Fentrim IS for interior window and door air sealing, and Siga Rissan for interior wall to foundation sealing. Overall, exceptional adhesion. However, I am still very old-fashioned about my builds. I do not think that anything will beat the longevity of copper in terms of water barrier. After taping the seams on out outside, I would always install copper flashing. Nail, then tape, the flashing to sheathing, and then proceed with installing brick or siding. After many decades, as the adhesive starts to degrade, you will always have the copper there to protect the home. Just my two cents for a 100+ year-old home.

[@AddisonHomes]

Thanks for sharing!

[@affordabledesertliving3487]

Beautiful! The Siga tape is exactly what I was looking for for sealing off where the OSB sheathing comes down to my cinder block foundation.

[@AddisonHomes]

Its a fantastic product that sticks to almost any material. We've found many other uses for it as well, but its adhesion to masonry and concrete is unmatched!

[@DrMJJr]

They could have just used Zip R and avoided the need for all those cap fasteners 🤦🏽‍♂️🤦🏽‍♂️🤦🏽‍♂️

[@AddisonHomes]

ZipR is definitely an option when it is available. We started using ZipR about a year ago once it was available in the Southeast. Prior to this, the exterior XPS over OSB was our best and most cost effective solution. It actually requires far fewer fasteners than the ZipR sheating, which requires fasteners at 4" on center. Far more "thermal breaks" with the ZipR fasteners, but its a one-step install.

[@Anytus2007]

I live in the same area as Todd and getting ZipR here is a real pain in the butt. None of the lumber yards carry it regularly. You basically have to contact the Huber Rep directly and get them to ship it to you from the factory. As a result, it's shockingly expensive because you aren't getting any of the benefits of economies of scale, larger-scale shipments, etc. The ZIP R-6 product costs me about twice as much as buying an uninsulated ZIP panel and putting 1" of XPS on the outside. Also, I'm not sure about Owens Corning, but if you use at least a 1" washer, Kingspan only requires the XPS to be nailed to the framing every 24" along the perimeter (which can be shared with the adjacent piece) and then every *other* stud in the field (so you have a 16" gap, then a 32" gap). Works out to about 10 nails per panel; not very time consuming to install.

[@gund89123]

Zip R can’t be used in seismic zones. I wanted to use it but my structural engineer said it doesn’t have the shear strength needed.