Vented Or Non Vented Attic

Calvin smith posted in energy efficiency and durability on september 1 2015 06 36am i m building a new home in miami fla.

Vented or non vented attic.

Protecting roofing panels from moisture damage requires proper planning and storage during the construction phase. What is more significant to note is that the color of shingles and roof orientation have a more profound effect on the durability of shingles than the choice of venting or not venting double or triple the effect of venting non venting. While both vented and unventilated attics are permitted in both the ibc ibc 1203 3 2 and irc r806 4 a should the wood panels get wet they may not be able to dry out and buckling or loss of structural integrity may result. Fill with spray foam after installing non vented lp smartside soffits fascia etc.

A vented attic system refers specifically to having working vents in the attic. The eaves will extend 12 from the rough framed walls. Either of these systems comes with a premium cost typically two to three times the price of a blown fiberglass or cellulose vented attic assembly. For example in the summer months your attic is likely going to be very hot.

Those vents in the attic allow for airflow and that airflow moves the hot air and moisture out of the attic. This facilitates the design of unvented attics in warm and mixed climates without an additional vapor retarder but requires an additional vapor retarder element in colder regions. An insulation contractor advises me to eliminate the planned roof soffit vents and seal the attic with foam. My question is how should the eave space be treated.