How To Avoid Deck Failure

John Temmel Siding Guy
by John Temmel Siding Guy
Deck flashing can make or break the structure of your deck. Here's how it works: you have your main house structure, your band board, half an inch of sheathing, and then siding. This is my deck flashing process: we cut and remove the siding at the band board, insert a large L-piece of flashing, install siding, and place the floorboards on top so that when it rains, the water will exit away from the house. This is the end result you want because the water won't leak into the structure of your home causing rot. When deck flashing is poorly installed, water will go behind the deck and rot the structure of the house, which will result in deck failure.
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