Iecc Roof Insulation Requirements

The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process.

Iecc roof insulation requirements.

The minimum thermal resistance r value of the insulating material installed either between the roof. Or component performance alternative of section c402 1 5 roof solar reflectance and thermal emittance fenestration in building envelope. A minimum r 3 5 thermal spacer block is placed above the purlin batt and the roof deck is secured to the purlins. R 13 r 13 the first r value is for faced fiberglass insulation batts draped over pulins.

Exterior roof complies with table c402 2 11 commercial cool roof or insulation of r 15 if present attics above insulation are vented and attics below insulation unvented roof surface slope of not less than unit vertical in 12 units horizontal i e 1 48 or 2 1 code says 21 tropical zone. Roofing specific requirements of iecc 2015 may 18 2017 10 arizona roofing contractors association webinar tapered insulation international energy conservation code 2015 edition c402 2 2 roof assembly. R value based method of section c402 1 3 u c and f factor based method of section c402 1 4. Specific insulation requirements of section c402 2 thermal requirements of either.

The ibc requires removal of the existing roofing materials down to the deck and installing a new roof covering assembly. The second r value is for unfaced fiberglass insulation r 13 r 19 batts installed parallel to the purlins.