It will either go down more, or break. If it breaks, then the wood is too tough for it; consider pre-drilling the holes. If it’s not descending, then the screw isn’t turning.

Why do composite deck screws have reverse threads?

Often, when screwing into composite material, the lumber mushrooms up a bit. The reverse thread on these screws cuts that mushroom head off, and the concave face pushes the rest of the material down for a natural, flush look.

How far do you screw in deck screws?

Deck screws should be slightly countersunk below the decking surface. The finish screws set to approximately 1/8″ (3mm) below the decking’s surface.

How do you face a composite deck screw?

Quote from Youtube video: You may have to face screw some of the decking whether that's near the building at the edge or your fascia. And these capped or screws it's the first time I've ever used them.

How long should composite deck screws be?

For composite decking, you will need at least 2 1/2-inch screws. Screws also have different diameters, from 1/16 inch (#0) to 5/16 inch (#20). For general decking purposes, you can use a 5/32-inch-wide screw (#10).

Can you use regular screws in composite decking?

You can screw or nail composite decking boards just like wood ones. Three-inch decking screws are the best fastener choice; they sink a secure distance into the joists and won’t back out like nails.

Where do screws go on a composite deck?

Fasten the deck board with composite decking screws along the edge closest to house; drive one screw into each joist. Install a hidden fastener into the edge of the deck plank, placing one at each joist. Use plastic tapping block and hammer to drive the sharpened spikes of the fasteners into the edge of the plank.

Do you countersink composite deck screws?

Trex recommends the use of two screws per joist. All recommended screws are designed to be installed flush with decking surface. DO NOT countersink screws.

Do you countersink deck screws?

A good countersink bit is necessary to fasten the wood decking. Tapered bits are preferable. They provide a good “slip hole” through the high-density hardwood decking and a smaller tapered hole in the deck joist or framing. Stainless steel deck screws are the only choice for fastening tropical hardwood decking.

How many screws do I need for composite decking?

For standard composite decks with 6-inch wide boards and 16″ OC joists, you will need at least 350 screws for every 100 square feet. Since most hidden clip fastener systems require fewer screws, you will need at least 175 screws for the same square footage.

What type of screws do you use on composite decking?

If you opt for composite deck screws, be sure to use stainless steel screws that will not rust or corrode. Select a minimum size of #8 x 2.5 in.

Can you use wood screws on composite decking?

No, wood screws won’t be durable if used in composite decking. Because its soft grip won’t be able to hold the composite particles together.

Are there special screws for Trex decking?

Trex recommends the use of two screws per joist.

Use recommended stainless steel screws in any areas near bodies of saltwater. 2-3/4″ or 3″ screws can be used with Trex 2×6 product.

What is a composite screw?

These screws are designed to work specifically with composite decking. They retain the corrosion resistance of the other screws in the Carpenters Mate range and won’t ruin the impact of your decking with unsightly screw heads.

How do you secure Trex decking?

6 Steps For Decking Installation

  1. Protect your substructure. Trex can be installed over timber, steel or aluminum substructures with joist centers at a maximum of 400mm apart. …
  2. Cut your boards. …
  3. Choose your layout. …
  4. Hide your screws. …
  5. Tighten as you go. …
  6. Cover the decking edges.

Can you use stainless steel screws on composite decking?


They offer an ideal performance with exotic woods and thermally treated wood, PVC and composite decking. These Stainless Steel trim-head deck screws securely fasten decking clips including thermal woods, and composite decking material.

What are green deck screws coated with?

Phillips Fastener Products (781-224-9750) describes its dull-green Evercote finish as a water-based, organic paint similar to a product used in the auto industry. The coating is applied on a fastener already protected by yellow zinc, a relatively low-level corrosion inhibitor.

What are coated screws for?

Screws are often plated with zinc or galvanized to protect against corrosion.

Why are deck screws Green?

Deck screws are typically coloured brown or green and are made to withstand the highly corrosive chemicals in pressure-treated lumber.

What grade are deck screws?

Stainless Steel Deck Screws are available in Grade 305 Stainless Steel or Grade 316 Stainless Steel.

What screws dont rust?

The stainless steel screw will absolutely be the best screw to resist rust. Stainless steel screws are rust-resistant throughout the entire screw, not just on the surface. The other screws are only covered with a rust-resistant coating on their surface, which will break down or wear off over time.