How to Build a Deck: Prevent Rot at the Patio Door
Plan on building a deck? Reduce the chance of water infiltration—install the decking a few inches beneath patio and entry door thresholds. It'south true that decking installed at the same level equally the interior flooring looks great and makes for a smoothen transition, just unless you live in the desert, it's not a good idea.
When decking is installed up tight to the bottom of a door, that door is not only subject to falling rain, but also to the pelting that splashes off the decking. And if y'all live in a northern climate, fifty-fifty a pocket-sized snowfall will expose your door to the powerful forces of water melting and refreezing.
Back when I was a siding contractor, h2o infiltration at doors with flush decks caused all kinds of issues. Nosotros frequently establish rotten doorsills, damaged floor and the ancestry of serious structural damage on houses but a few years erstwhile. There's no magic number, merely I would recommend a minimum of 2 in. from the summit of the decking to the bottom of the patio door threshold. I opted for iii-1/2 in.
Many doors have a sill or threshold that needs to exist supported, so don't forget to install a kicking plate under the door. I ripped downwardly a piece of decking trim board and painted it the same colour as the door. Kick plates do become "kicked." Eventually, I am going to supplant mine with a PVC or composite lath—either volition accept a chirapsia and look great without my having to stain or paint information technology every yr.
— Mark Petersen, Contributing Editor
Need more advice most building a deck?
Rebuild an Old Deck With New Decking and Railings
Attaching a New Deck to a House the Right Method
How to Build the Deck of Your Dreams
Source: https://www.familyhandyman.com/article/how-to-build-a-deck-prevent-rot-at-the-patio-door/
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