Roof Venting With Rigid Foam

We have the capabilities to spray and inject a variety of foam systems to achieve a high r value while providing both effective vapor and air barriers.

Roof venting with rigid foam.

Gaf cobra rigid vent 3 11 5 in. Roof ridge exhaust vent in black case model 2018000 93 31 case. A thick typically 1 5 thick closed cell polyurethane waterproofing barrier seals the roof against leaks. Set your store to see local availability add to cart.

Foam roofing bonds around roof penetrations such as pipes vents and edges. If you have a vented attic it makes no sense to install rigid foam above the roof sheathing. 2009 international energy conservation code iecc section 101 4 3 additions alterations renovations or repairs. Owens corning ventsure 11 in.

The rigid foam is cut to be 2 inches wider than the space between rafters then 1 inch of foam is scored and folded over on either side of the foam creating standoffs that hold the foam away from the roof sheathing providing a space for air to flow. When set into place and sealed with spray foam the vent baffles are insulated and air sealed. Many homes in more urban areas or other places with dense populations are opting for this method because they can better optimize space. You might as well put the rigid foam in the branches of a tree in your back yard.

A vented attic is basically outdoors so installing rigid foam above your roof sheathing is a waste of money and a waste of rigid foam. Benefits of rigid foam on top of sheathing. Foam tech creates superior insulation and environmental control solutions by installing safe cost effective and environmentally friendly polyurethane foams. Roof vent attic fan plastic ridge vents air vent ridge vents gaf venting attic.

The dura foam roof system has a rigid and durable surface that you can walk on. The movement of air into indirect conditioning of an unvented attic is a slow gradual process that will not be noticeable by occupants and typically will not put any strain on the hvac system. Ridge vent rigid roll with weather protector. The minimum insulation requirements for ceilings walls floors and foundations in new homes as listed in the 2009 2012 2015 and 2018 iecc and irc can be found in this table.

Installing rigid foam insulation on top of roof sheathing is a great option for commercial buildings and homes with limited space. Of open or closed cell spray foam in their roof or to stack a half foot of rigid foam on the roof deck. But spray foam insulation used at the underside of the roof deck would need to be covered by a thermal barrier and intumescent coatings are commonly used. Similarly not everyone can afford to spray nearly 10 in.

Spray polyurethane foam spf is the only roofing material that has no seams.