spacing of joists for cumaru boards deck

PROPER SPACING OF JOISTS & GAPS. GAP SPACING: A 1/16” gap between Seven Trust deck boards is recommended. This will allow the Seven Trust decking to expand and contract without abutment. 1/16” gap spacing is also adequate for air circulation & water drainage. The average contraction of a 4” wide Seven Trust deck board is approx. 1/16”. 【Get Price】

Typically joist spacing greater than 16” is not allowed by code but there are exceptions. For joist spacing greater that 16” OC consider using “5/4 x 6” (1” x 5.5”). The additional board thickness contributes to the overall span strength of the decking. Brazilian Wood Depot always stocks both 1×6 and 5/4 x 6 Seven Trust decking. 【Get Price】

Deck joist spacing should never exceed 16” on center (with the exception of MAX deck boards which allow for maximum 24" on center). For a more rigid feel 12” or less may be preferred. If adding additional framing be sure to keep all boards level and in plane across the tops. 【Get Price】

Why the Proper Deck Board Spacing Is Important. While the gap in your deck boards may seem like a small step in a deck project the gap size you choose serves a significant purpose. Deck board spacing provides airflow through your decking allowing evaporating air to escape. This helps to keep your deck’s framework dry and rot free. 【Get Price】

Adjust the spacing between deck boards gradually over the next 10 rows of decking until the distance to the house is equal. The last board won’t look good if it’s skinny or cut at an angle. In most cases it’s best to start with a full board on the outside edge of the deck and work toward the house so the odd board is less visible. 【Get Price】