Foam Board Roof Vent

Foam board insulation with rigid panels polystyrene and styrofoam boards are low cost and quick and easy to fit to the large panel in the camper van.

Foam board roof vent.

Vent a foam insulated roof there used to be a time when the only insulation available was pink fiberglass. The plyco quick vent is non wicking highly pliable while still providing a superior airflow. Just peel the backing as you install. In an un vented roof foam can serve as the air barrier and vapor retarder and prevent moisture from getting in to the roof.

Plyco quick vent comes in 2 x 10 lengths for quick and easy installation. Attach the tongue and groove insulation boards to the concrete wall with adhesive. No more foam flapping in the wind. Additionally raft r mate attic vent has an optional bend down air stop or insulation block at the top plate of the wall in one easy to install product.

If you want to install rigid foam above your roof sheathing in climate zone 3 then 1 2 inch of rigid foam board is not ideal this rigid foam layer needs a minimum r value of r 5 and that s impossible with 1 2 inch of foam. Simply peel the backing and install. Use a premade kit for this type of project. Some people nail flat 2x4s on top of their existing roof and build a new roof to create a vent space but it would be hard to justify the cost for a workshop.

The superior adhesive helps make a complete seal. Today there are more options. All insulation materials require proper venting. Owens corning raft r mate attic vent is an extruded polystyrene foam vent designed to assure unrestricted airflow from the soffit to the ridge vent.

In a vented roof foam can seal the openings and serve as an air barrier and a vapor retarder in addition to its insulating function. So an unvented roof is probably your best option. Rigid foam and spray foam are two of them. Cathedral roofs especially need a lot more insulation between the ceiling and the rafters because there usually isn t.

As for iso board vs. Of airflow per linear ft. For a basement remodeling project consider insulating basement walls with foam board. Spray foam the iso board would be a lot cheaper especially if this is a diy project.

For new construction use rigid boards to insulate slabs and the outside of foundation walls.