Wood Siding Clearances

By Robert Robillard on Exterior Repairs

step flashing

Wood Siding Clearances

Wood trim and siding should always be installed with an air gap when installed at a roof, ground or concrete contact area.   Flashing is typically used to make the connection between the two.

Roof Areas

Trim that extends down to a roof such as on dormer sidewalls and decks require a minimum of a 1 to 2 inch gap to avoid moisture wicking into the end grain.

Ground Contact Areas

Trim, such as water table or skirt boards must be a minimum of 6 inches but better to be 18″ above the ground.  Remember in both situations to prime the end grain before installation.

Wood Siding Clearances

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About the author

Robert Robillard

Carpenter / Remodeler / Editor

Rob Robillard is “The Concord Carpenter” Rob is a builder, general contractor, carpenter, woodworker, and editor of Concord Carpenter and ToolBoxBuzz As a General Contractor and carpenter, Rob owns and operates Concord Carpenter LLC. A full-service remodeling and construction company. Rob is a recognized leader in home building best practices and a source for how-to information for building professionals. On this website, Rob covers all aspects of home construction, building science, home improvement, woodworking, remodeling, and some of the best product and tool reviews. Rob is in charge of our Tool and Product Review series - Concord Carpenter Videos where we post all of our tool reviews and video tutorials. Rob approaches remodeling and building construction with a pragmatic and problem-solving approach. He enjoys using his knowledge and experience to help and educate building professionals as well as DIYers on best practices in the construction and remodeling industry. He's a strong advocate for "raising the bar" in the construction trades and promoting the trades to youth. #BeAMentor #Green2Great Craftsmanship, quality, and pride guide his journey on this channel The Concord Carpenter's motto: "Well done is better than well said!" : Read more about Rob

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