Building A Roof Deck

By Robert Robillard on Decks And Porches

Building A Roof Deck

Railing Requirements:

The beauty of the Azek system is that the baluster spacing conforms to the International Residential Code [IRC] calling for on-center baluster spacing to be less than 4 inches. The IRC also requires that a guardrail be 42 inches in height and the entire assembly be strong enough to resist a 200-pound horizontal load (or 20 pounds per linear foot, depending on the local code).

The Azek railing system meets this requirement and can be ordered so the balusters do not need to be cut to reach the 42 inch requirement. By eliminating the need to cut the balusters we saved time and labor.

NOTE: Check local code requirements prior to installation. Most building codes require that a 4” sphere shall not pass though the rail at any point.

Building A Roof Deck

The Devil Is In the Details:

We spent time making sure the siding, and trim were installed properly by flashing all of our joints and not nailing anywhere with in 8” of the deck to ensure we did not penetrate the rubber roofing that ran up the side wall.

One detail that we changed from the original design was to run a horizontal trim board, a skirt board, along the deck. This board allowed us to install our fasteners up high as opposed to installing and fastening clapboard siding down to the deck as it was to the earlier deck. The fewer nail hoes the better!

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About the author

Robert Robillard

Robert Robillard

Carpenter / Remodeler / Editor / Writer / Video Talent

Robert Robillard is a remodeler, general contractor, and principal of a carpentry and renovation business located in Concord, Massachusetts. He also writes the "Ask the Carpenter" advice column in the Boston Globe, and serves as the Editor of Tool Box Buzz and founding editor of A Concord Carpenter . Rob is in charge of our Tool and Product Review - Tool and Product Review - Video Channel, , where we post all of our tool reviews and video tutorials. Rob enjoys using his knowledge and experience to help and educate building professionals as well as DIYers on best practices in the remodeling industry. The Concord Carpenter's motto: "Well done is better than well said!" : Read more about Rob <a href=""

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