Roof Assemblies

Asphalt Shingles Need Approved Fasteners and Placement

How many nails are required for asphalt shingles by code?

R905.2.6

Asphalt Shingles Need the IRC Minimum Roof Slope

What is the minimum roof slope for asphalt shingles under IRC 2021?

R905.2.2

Drip Edge Is Required at Eaves and Rakes for Asphalt Shingle Roofs

Is drip edge required by IRC 2021?

R905.2.8.5

Flashing Is Required Where Roofs Meet Walls, Chimneys, and Penetrations

Where is roof flashing required by IRC 2021?

R903.2.1

Ice Barriers Are Required Where There Is a History of Ice Dams

When is an ice barrier required on a roof?

R905.1.2

Reroofing Must Follow IRC Overlay and Tear-Off Limits

Can you put new shingles over old shingles under IRC 2021?

R908.3

Roof Coverings Must Protect the Building From Weather

Does the IRC require a roof covering on every dwelling?

R901.2

Roof Underlayment Is Part of the Required Roof Assembly

Is roofing underlayment required by IRC 2021?

R905.1.1

Roof Valleys Need Lined or Approved Closed-Valley Protection

What does code require for roof valley flashing?

R905.2.8.2

Roofs Must Drain Without Damaging the Building

Does the IRC require gutters or roof drainage?

R903.4