Iecc Roof Insulation Requirements

Roof replacement is a defined term in the i codes.

Iecc roof insulation requirements.

The minimum thermal resistance r value of the insulating material installed either between the roof. 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. R value based method of section c402 1 3 u c and f factor based method of section c402 1 4. The ibc requires removal of the existing roofing materials down to the deck and installing a new roof covering assembly.

The iecc requirement above is limited to those buildings where the roof assembly contains above deck insulation and is part of the building s thermal envelope. R 13 r 13 the first r value is for faced fiberglass insulation batts draped over pulins. 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. 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.

A minimum r 3 5 thermal spacer block is placed above the purlin batt and the roof deck is secured to the purlins. The second r value is for unfaced fiberglass insulation r 13 r 19 batts installed parallel to the purlins.