Framing for a “Hot Roof”

An unvented roof brings the attic space into the conditioned envelope.

By Jason Black

The roof framing is driven by the fact that the attic will be part of the conditioned space, so we have this space to run our heating and cooling ductwork without an efficiency penalty. To do this, we designed an unvented “hot roof.” The framing crew erected a structural ridge, hand-cut 2×8 rafters, and sheathed the roof with 5/8-in. Zip System sheathing. (Here we used the regular-style sheathing rather than insulated R-sheathing.) Once the panel seams are taped, the roof is dry. In Norton Commons all houses are required to have black asphalt shingles, which simplifies our aesthetic choices!

The rafters are anchored with Simpson Strong-Tie H2.5A hurricane anchors.

The roofers hand-nail the shingles, which leads to fewer over-driven nails and, on the whole, more accurate nail placement.

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FJN | Jul 11, 2019 12:54pm | #1
By the way,you installed the Simpson H2-5A ties on the wrong side of the wall. Here is a link to Simpson showing correct installation.https://www.strongtie.com/resources/product-installers-guide/h25a-installation

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Kentucky 2019

Framing for a “Hot Roof”

An unvented roof brings the attic space into the conditioned envelope.

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