The treated-wood industry recommends the use of hot-dip galvanized or stainless steel fasteners for use with treated wood. Electroplated/electro-galvanized and mechanically-galvanized coatings should not be considered to be hot-dip galvanized.
What kind of screws do you use with pressure treated wood?
Galvanized, ceramic coated, or stainless steel screws are the best corrosion-resistant fasteners for pressure-treated cedar or redwood.
Do you need special screws for pressure treated wood?
Mechanically galvanized screws are generally suitable for decks and other outdoor projects made of pressure-treated lumber.
How do you screw into pressure treated wood?
Youtube quote:Screws should penetrate the joist below by an inch and a half so for a one-inch thick decking two and a half inch screws of the standard. Choice.
What type of screws and nails must be used in pressure treated lumber?
For most applications, however, best nails for pressure treated lumber are either hot dipped galvanized nails and bolts. For screws we recommend using ones that have a protective coating that is designed for use with pressure treated lumber. one example would be Outlaw fasteners.
Can you use zinc coated screws in pressure treated wood?
recommendations, a minimum of ASTM A 653, type G185 zinc-coated galvanized steel, or equivalent, shall be used. Exception: Plain carbon steel fasteners, including nuts and washers in SBX/DOT and zinc borate preservative treated wood in an interior, dry environment shall be permitted.
What kind of hardware should I use for pressure treated wood?
Hot-dip galvanized or stainless steel fasteners, anchors and hardware are recommended by the Preservative Treated Wood Industry for use with treated wood. This has been the position of this industry for years and their position has not changed with the transition to the alternative copper-based products.
Will pressure treated wood corrode metal?
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.
Will pressure treated wood eat nails?
Just any wood screw or nail will not do; instead, look for fasteners that are specifically designed for use with ACQ-treated materials.
Can you use drywall screws in treated lumber?
It is a very bad idea to use dry wall screws with treated lumber. There are certainly ASTM codes which set out the coating specifications for certain types of fasteners to be used with ACQ treated lumber.
What is the difference between a drywall screw and a deck screw?
Drywall screws used for trim have flat heads and are installed with a Phillips head screwdriver or square driver. Deck screws and wood screws both have flat heads. However, deck screw heads have a larger surface area. This gives deck screws a higher load capacity.
Can you use pressure treated wood for wall studs?
You can use pressure-treated wood for framing. However, pressure-treated lumber costs much more and does include potentially toxic chemicals. Thus, pressure-treated wood is only recommended for outdoor applications and where framing touches the foundation.
What are ACQ screws?
Pressure treated lumber is treated with Alkaline Copper Quaternary (ACQ), an environmentally friendly water-based preservative that is free of arsenic and chromium. However, ACQ treated lumber is more corrosive to metal, so the right fastener is key to a safe, long lasting deck, fence or other outdoor project.
Can you use stainless steel screws in pressure treated wood?
There are only two recommended corrosion resistant systems which should be used with pressure treated wood: hot-dip galvanized steel and stainless steel fasteners and industrial consumables.
Is all pressure treated wood ACQ?
With this new change in place, all pressure treated lumber manufactured for residential use (and available to the general public) after January 2004 has been treated with different chemicals. The new pressure treated lumber is preserved with Alkaline Copper Quaternary (ACQ), or also known as Copper Azole (CBA).
Is all pressure treated lumber ACQ?
Since January 1, 2004 all pressure treated wood sold in the USA has been produced using either ACQ (Alkaline Copper Quaternary) or CA (Copper Azole) arsenic free treatments. These newer treatments are about 6 times higher in copper content than the old CCA (Copper Chromated Arsenic).
What’s the difference between #1 and #2 pressure-treated lumber?
If the wood is #1, it is stamped #1. The main difference between #1 and #2 is the slope of the wood grain, size, spacing, and the number of knots and holes, and the length of any splits. Construction grade is #1 and Standard is #2. Both can be used for load-bearing purposes or other outdoor applications.
What does ACQ stand for in treated lumber?
Alkaline Copper Quaternary
ACQ wood preservatives (types A, B, C, and D) are composed of copper oxide and a quaternary ammonia compound. The absence of chemicals like arsenic or chromium has made ACQ one of the most widely used residential wood preservatives.
