Pressure Treated Wood For Deck Joists

So he has two rot fighting tips for deck owners and builders.

Pressure treated wood for deck joists.

5 4x6s and 2x6s for decking. Treated wood is generally available as dimensional stock in 2x4s 2x6s 4x4s and 2x2s for rail components. He sees it all the time. Deck joists rotting from the top edge down because the deck boards and debris keep them damp for weeks after rain.

But my friend wasn t. Interior walls are within a climate controlled environment and are presumed to be free of moisture. If a cosmetic issue remove the plank flip and refasten. Our page top photo shows a small deck addition to a 1920 s bungalow in poughkeepsie ny.

The predominant species of treated wood is a regionally available softwood. If repairing a damaged joist support the deck on one side or it could crash. Set your store to see local availability. This guide will teach you to safely repair any deck or joist.

Pressure treated wood column model c63202d 163 14 163 14. 2x8s 2x10s and 2x12s for joists stair stringers and beams. Pressure treated thick deck decking board model 107979 20 98 20 98. Note that this requirement is only for exterior walls as these may wick moisture onto the lumber.

Pressure treated wood is required whenever you attach framing lumber or furring strips directly to concrete or other exterior masonry walls below grade. The joists were pressure treated lumber so i was surprised at how badly decayed they were. Failure to use proper flashing approved flashing tape and or proper deck drainage systems will void the warranty. Section r507 5 notes that deck joists can cantilever up to 1 4 of the joist span.

But you ll notice when you look at the portion of the span table for joists with cantilevers that the joist span for decks with a cantilever is often less than the span for the same sized joist without cantilevers. 6x6s for support posts and plywood. The larger the deck the larger the joists. In typical deck construction with a ledger on one side of the joist and beam on the other the size of the joists is driven by the size of the deck and based on the general maximum spans mentioned above.

Deck drainage systems that cover upward horizontal surfaces of pwt treated lvl joists and beams preventing wetting from occurring are acceptable substitutions for flashing on the joists and beams. This article explains typical spans for deck joists deck beams and deck flooring giving both standard span tables and a quick rule of thumb that works pretty well. Species sizes of pressure treated wood. Make any wood replacements with a similar type of pressure treated lumber.

For best results refer to our wood and composite deck joist span table. It has a much higher resistance to moisture than ordinary lumber even more than rot resistant types like redwood and cedar. Use pressure treated lumber when you install the joists. Perry mastrovito design pics getty images.