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ensuring air flow under decking drainage

Why is Deck Ventilation Important? - AdvantageLumber Blog

A lot of people ask how much space they need under their deck, or if extra ground clearance is even necessary. At AdvantageLumber.com, we recommend at least 18 inches of open air under the joists. Anything less is risky.

How to Space Decking for Proper Ventilation

Spacing Your Deck Boards During Installation is Critical If you install decking with gaps that are too narrow, or don’t leave any gap spacing at all, you will block the air flow from under your deck. Restricted airflow will lead to the deck boards cupping.

DIY Under Deck Water Diversion and Drainage - YouTube

This is a step-by-step instructional video on creating a DIY under deck water diversion and drainage system to divert water from a deck above the entrance to

Under-Deck Roof (DIY) | Family Handyman

To provide drainage, the panels should slope toward the outside edge of the deck about 1/4 in. per foot. If the span under your deck is 12 ft., for example, the purlin at the outer end of the deck should be 3 in. lower than the purlin along the house (12 x 1/4 = 3). First, mark all the purlin locations on the deck joists.

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