§ Chapter 7 IRC 2021
Wall Covering
11 entries from Chapter 7 of IRC 2021, organized by section number. Each entry covers what the code requires, why it exists, what inspectors look for, and common mistakes.
§ 01 Sections
All 11 entries.
Sorted by section number. Click any row for the full entry — answer, requirements, edition diff, related sections.
Section
Title
Question
R702.3
Interior Gypsum Board Thickness Depends on Framing Spacing and Fire Requirements
R702.3
What drywall thickness is required on interior walls and ceilings?
What drywall thickness is required on interior walls and ceilings?
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R702.4
Shower Tile Needs an Approved Water-Resistant Backing System
R702.4
Is cement board required behind shower tile?
Is cement board required behind shower tile?
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R703.1
Exterior Wall Coverings Are Part of the Weather-Protection System
R703.1
Does exterior siding have to be weatherproof or just decorative?
Does exterior siding have to be weatherproof or just decorative?
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R703.2
Exterior Walls Need an Approved Water-Resistive Barrier Behind Siding
R703.2
Is house wrap required behind siding under the 2021 IRC?
Is house wrap required behind siding under the 2021 IRC?
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R703.3
Siding Installation Must Follow IRC and Manufacturer Requirements
R703.3
Can new siding be installed over old siding or sheathing?
Can new siding be installed over old siding or sheathing?
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R703.4
Exterior Wall Flashing Must Direct Water Out, Not Into the Wall
R703.4
Where is flashing required on exterior walls?
Where is flashing required on exterior walls?
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R703.4
Horizontal Exterior Trim Usually Needs Flashing and Drainage Protection
R703.4
Do horizontal trim boards and band boards need flashing?
Do horizontal trim boards and band boards need flashing?
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R703.4.1
Window and Door Openings Need Flashing That Drains to the Exterior
R703.4.1
Do windows need pan flashing under the 2021 IRC?
Do windows need pan flashing under the 2021 IRC?
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R703.6
Stucco Over Wood Framing Needs WRB, Lath, Flashing, and Correct Thickness
R703.6
What does code require behind stucco on wood framing?
What does code require behind stucco on wood framing?
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R703.7
Masonry Veneer Needs Support, Anchorage, Drainage, and Flashing
R703.7
Does brick or stone veneer need an air gap, ties, and flashing?
Does brick or stone veneer need an air gap, ties, and flashing?
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R703.7.3
Brick Veneer Needs Weeps and Flashing to Drain the Wall Cavity
R703.7.3
Are weep holes required in brick veneer walls?
Are weep holes required in brick veneer walls?
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