Liquid vs Sheet Applied Vapor Permeable Air Barrier Membrane

15 years ago

We are considering some of the liquid-applied membranes instead of sheet applied Typar/Tyvec, and wonder if any of you have had experience with these roll or spray on sheathing coatings?

We're building in NY State in an area that gets long and windy winters. Framing is 2x6 construction w/Â½" ply sheathing; we will be using either open cell spray foam or water-borne cellulose insulation (or perhaps combination), siding will be Hardi or Nichiha. Lots of inside and outside corners will make sheet install a bit difficult.

It seems these coatings are used commercially. Will Hardi or Nichiha accept them? Any idea of difference in cost between Typar and, say, Carlisle Barritech VP?

Thanks for all feedback! --Mark

Comment (1)

mightyanvil
15 years ago
These are the ones I am familiar with:

1. Perm-A-Barrier VP ÃÂ® Air/Vapor Barrier fluid applied synthetic latex rubber membrane as manufactured by Grace Construction Products.
a. Primary Air Barrier Membrane: One component elastomeric membrane, spray applied.

2. Air Bloc 31 as manufactured by Henry Company Inc., Cold Stream Road, Kimberton, PA 19442.

3. Sto Guard Assembly: manufactured by Sto Corp., Camp Creek Pkwy, Atlanta, GA 30331
a.Sto guard mesh for joints and flashings
b.Sto Gold Fill for joint treatment.
c.Sto Gold Coat for the membrane

4. PROSOCO R-GUARD Assembly: provided by PROSOCO, Inc., 3741 Greenway Circle, Lawrence, Kansas 66046.
a.PROSOCO R-GUARD Tape for joints and flashings
b.PROSOCO R-GUARD Fill for joint treatment
c.PROSOCO R-GUARD Spray Wrap for the membrane

I have used the WR Grace product on CMU back up in a brick cavity wall for a college dormitory but I like the STO system for residential construction because it can be applied by anyone with a roller.These products will someday be the only weather/air barriers used in houses when the manufacturers finally decide to actively market them for that use.

Sorry, I don't have any cost data at the moment.
Related Professionals
Asbury Park Architects & Building Designers · Panama City Beach Architects & Building Designers · Plainville Architects & Building Designers · South Pasadena Architects & Building Designers · Frisco Home Builders · Highland Village Home Builders · West Hempstead Home Builders · Delhi General Contractors · Flint General Contractors · Jackson General Contractors · Middletown General Contractors · Rolla General Contractors · Signal Hill General Contractors · Troutdale General Contractors · Wolf Trap General Contractors