• Codes
  • Features

    Features Overview

    Go to features
    Reference

    Reference.

    A reliable and up-to-date source of codes.
    Research

    Research.

    Rapidly and efficiently calculate project parameters.
    Collaboration

    Collaboration.

    Get everyone on the same page and streamline code research.
    Workflows
    Architects
    Architects
    General Contractors
    General Contractors
    Building Official & Plans Examiners
    Building Official & Plans Examiners
    Inspectors
    Inspectors
    Owners
    Owners
    Subcontractors
    Subcontractors
    Code Consultants
    Code Consultants
  • Pricing
  • Login
  • Sign Up
Sign Up
Login
  • Code Library
  • Features
  • Pricing
  • About
  • Careers
  • Help
  • Contact
  • Terms
  • Privacy
Sign Up
Upgrade to Premium
Code calculators: Code Calculators automatically generates a detailed list of requirements.
REFERENCE
Amendment Styling
Industry-leading search
Code diagrams
RESEARCH
Code calculators
Filter by topic
Code compare
Code sheet exports
COLLABORATION
Team projects
Bookmarks
Comments
START 2 WEEK FREE TRIAL
Have an account? Sign in
// CODE SNIPPET

AF103.5 Passive Submembrane Depressurization System

2018 Washington State Residential Code > F Radon Control Methods > AF103 Requirements > AF103.5 Passive Submembrane Depressurization System
JUMP TO FULL CODE CHAPTER
In buildings with crawl space foundations, the following components of a passive submembrane depressurization system shall be installed during construction.
Exception: Buildings in which an approved mechanical crawl space ventilation system or other equivalent system is installed.

AF103.5.1 Ventilation

Crawl spaces shall be provided with vents to the exterior of the building. The minimum net area of ventilation openings shall comply with Section R408.1.

AF103.5.2 Soil-Gas-Retarder

The soil in crawl spaces shall be covered with a continuous layer of minimum 6-mil (0.15 mm) polyethylene soil-gas-retarder. The ground cover shall be lapped not less than 12 inches (305 mm) at joints and shall extend to all foundation walls enclosing the crawl space area.

AF103.5.3 Vent Pipe

A plumbing tee or other approved connection shall be inserted horizontally beneath the sheeting and connected to a 3- or 4-inch-diameter (76 or 102 mm) fitting with a vertical vent pipe installed through the sheeting. The vent pipe shall be extended up through the building floors, and terminate not less than 12 inches (305 mm) above the roof in a location not less than 10 feet (3048 mm) away from any window or other opening into the conditioned spaces of the building that is less than 2 feet (610 mm) below the exhaust point, and 10 feet (3048 mm) from any window or other opening in adjoining or adjacent buildings.

Related Code Sections


AF103.5 Radon Control Methods, Passive Submembrane Depressurization System
In buildings with crawl space foundations, the following components of a passive submembrane depressurization system shall be installed during ...
2018 Washington State Residential Code > F Radon Control Methods > AF103 Requirements > AF103.5 Passive Submembrane Depressurization System
AF103.5 Radon Control Methods, Passive Submembrane Depressurization System
In buildings with crawl space foundations, the following components of a passive submembrane depressurization system shall be installed during ...
2015 Washington State Residential Code > F Radon Control Methods > AF103 Requirements > AF103.5 Passive Submembrane Depressurization System
AF103.5.3 Radon Control Methods, Vent Pipe
A plumbing tee or other approved connection shall be inserted horizontally beneath the sheeting and connected to a 3- or 4-inch-diameter (76 or 102 ...
2015 Washington State Residential Code > F Radon Control Methods > AF103 Requirements > AF103.5 Passive Submembrane Depressurization System > AF103.5.3 Vent Pipe
Section AF103 Radon Control Methods, Requirements
, the following components of a passive submembrane depressurization system shall be installed during construction. Exception: Buildings in which ...
2015 Washington State Residential Code > F Radon Control Methods > AF103 Requirements
Section AF103 Radon Control Methods, Requirements
buildings with crawl space foundations, the following components of a passive submembrane depressurization system shall be installed during ...
2018 Washington State Residential Code > F Radon Control Methods > AF103 Requirements
Help Contact Us Privacy Terms
Code sheet exports
Code sheet exports
Generate a code sheet that integrates with your drawing set.
Code Compare
Code Compare
Highlight differences between any two building codes.
Code Calculators
Code Calculators
Code calculators automatically generate a detailed list of requirements.
Shared projects
Shared projects
Projects provide a dedicated space to collaborate on code research.
Search
Search
Don't miss relevant code. Quickly locate sections across your jurisdiction.
Code diagrams
Code diagrams
Unpack the code through illustrations and descriptions.
UpCodes Premium
Leverage the most sophisticated code compliance platform.
VISIT PRICING
UpCodes Premium
Leverage the full code compliance platform.
START 2 WEEK FREE TRIAL PRICING