Build a Better Home: Walls

Window installation stepsWalls are an integral part of a structure's water and weatherproofing system. Details in wall design and construction are important in preventing damaging moisture build-up, whether the moisture originates from outside or inside the building. Care in wall design, particularly around window and door openings, can prevent damaging moisture build-up.

Get the Brochure

Build a Better Home: Avoiding Moisture Accumulation in Walls

 

APA's Avoiding Moisture Accumulation in Walls brochure, available for free download in PDF format from the APA Resource Library, illustrates the following critical construction considerations and guidelines:

  • How Water Leaks into Wood Wall Construction
  • Preventing Leaks with Flashing
  • Weather-Resistive Barriers
  • Caulking as a Waterproofing Component
  • Air Infiltration in Wood Wall Construction
  • Vapor Transmission in Wood Wall Construction
  • Capillary Suction
  • Installing Rain-Screen Walls

Watch the Videos

 

These video segments are excerpted from the Build A Better Home: Moisture Control in Residential Construction video produced by APA. You can purchase the complete 25-minute video from the APA Publications Library. Please refer to current APA literature and consult your local jurisdiction or design professional to assure proper compliance with code, construction and performance requirements.

Walls

Flashing and Installing Windows

Panel Lap Siding Installation Tips

Brick & Stucco


Download Construction Details

Click on "JPG" or "CAD" to download the associated detail.

Walls JPG CAD
Windows    
Cross-section of a window in a wall with wood siding jpg download cad download
Flashing window when using house wrap jpg download  
Flashing window when using building paper jpg download  
Cross-section of window in brick veneer over wood wall jpg download cad download
Cross-section of window with cement stucco over wood wall jpg download cad download
Doors    
Sill flashing at sliding glass door jpg download cad download
Building paper around a door opening jpg download  
Ledges / Intersections    
Flashing and weather-resistive barrier at brick ledge jpg download cad download
Flashing at termination of cement stucco over wood wall jpg download cad download
Flashing at brick veneer-to-roof intersection jpg download  
Flashing at stucco-to-roof intersection jpg download  
Weather-resistive system at wall penetration jpg download  
Weather-resistive system at exterior deck jpg download cad download
Caulked joint geometry jpg download  
House Wrap    
Z-flashing in single-wall system with panel siding jpg download  
Proper air barrier installation (2-story wall shown) jpg download  
Air installation details using header wrap jpg download  
Rain-screen wall details jpg download cad download