Corrosion-resistant stainless steel screws, nails and bolts in grades 304 and 305 can be used for copper-treated wood in most areas, while grade 316 should be used in coastal areas. But stainless steel fasteners can cost five to 10 times more than similar galvanized fasteners.
What screws do I need for pressure treated wood?
The wood treatment industry recognizes the corrosive nature of ACQ in relation to fastening systems, and recommends hot-dipped galvanized or stainless steel nails be used.
Can you use stainless steel screws on a deck?
Eagle Claw 304 Stainless Steel Deck Screws
They also won’t stain non-treated wood, like galvanized screws. These deck screws are suitable for hardwood and softwood, including redwood and cedar. … The package contains 5 pounds of #10 3-inch 304 stainless steel screws.
Does pressure treated wood corrode stainless steel?
The two most popular chemicals for wood pressure treatment are alkaline copper quaternary (ACQ) and copper azole (CA), which are both active corrosion materials. Only two corrosion protection systems are recommended for use with these pressure treatment chemicals: hot-dip galvanized steel and stainless steel.
Can you use zinc coated screws in pressure treated wood?
Fasteners for preservative-treated wood shall be of hot dipped zinc-coated galvanized steel, stainless steel, silicon bronze or copper. … In the absence of manufacturer’s recommendations, a minimum of ASTM A653 type G185 zinc-coated galvanized steel, or equivalent, shall be used.
What screws to use for outdoor decking?
An 8 gauge, 2.5” coated deck screw is most commonly used when fastening deck boards to joists. For deck framing, structural wood screws such as Simpson SDS 1.5” screws work with joist and stringer hangers, as well as post/beam brackets.
What are the best screws for decking?
A good all-around choice is #10 decking screws—generally in 2 1/2- to 3 1/2-inch lengths. Decking screws are sharp, tapered, self-sinking, and coated for corrosion resistance. With a cordless drill/driver, you can drive them about as fast as nails.
Does stainless steel react with cedar?
Hot-dipped galvanized, aluminum and stainless steel nails are all corrosion-resistant and all can be used to nail Western Red Cedar. … Copper nails also react with cedar and should not be used. Stainless steel is the best choice but hot-dipped galvanized is the most widely used and economical.
Do you need special screws for pressure treated wood?
No special fasteners are required when building with borate pressure treated wood.” … The fasteners used with the product shall be carbon steel, galvanized steel, stainless steel, copper, and silicon bronze.”
Does pressure treated wood react with steel?
Pressure treated wood is a popular product for outdoor construction, i.e. bridges and decks. … When wood treated with the new chemicals was exposed to metal parts, the metal tended to corrode, even moreso in water contact environments, in only a few years.
Will treated lumber corrode steel?
ACQ treated lumber is reportedly more corrosive to steel and coated steel than CCA treated lumber 3. This has raised concerns regarding the corrosion of Structural Galvanized Steel Sheets typically used in bracketry or similar hardware, Architectural Steel Sheets used in roofing and siding product, and fasteners.
Are wood screws stainless steel?
Stainless steel wood screws are partially threaded with a shoulder. … One of the more popular types of stainless steel wood screws are stainless steel deck screws. Deck screws typically come in 305 stainless steel.
Why can’t you use zinc plated screws in treated lumber?
We do not recommend electro-galvanized screws (also called clear-zinc coated) for exterior applications. They will corrode quickly in contact with the elements. Mechanically galvanized screws are generally suitable for decks and other outdoor projects made of pressure-treated lumber.
Does pressure-treated wood eat screws?
Treated wood is typically used in applications where it may be exposed to moisture for considerable periods so any fasteners and connectors used with treated wood must also be resistant to these conditions.