How do you fasten deck boards
Andrew Campbell
Published Apr 18, 2026
The Consensus: For a deck build it’s best to use a combination of nails and screws. … Screws are superior for laying down the decking. They hold things flush better and have a better fastener/tensile strength, which keeps boards from popping up over time.
Is it better to screw or nail deck boards?
The Consensus: For a deck build it’s best to use a combination of nails and screws. … Screws are superior for laying down the decking. They hold things flush better and have a better fastener/tensile strength, which keeps boards from popping up over time.
What kind of nails do you use for a deck?
The best nails for decking are stainless steel nails as they offer the greatest resistance to rust with minimum discoloration to woods such as cedar. However, stainless steel nails are considerably more expensive than other nails.
Do I need to screw deck boards to every joist?
Each deck board should be fastened with two screws at each point where the board crosses a joist to ensure the stability and durability of your deck’s surface. Boards should be fastened to rim joists with three screws.How long should deck nails be?
The length of the nail depends on the thickness of the material being fastened. A good practice is to use nails at least double the length of the thickness of the wood – 1½” thick lumber, use 3” (10d) to 3½” (16d) log nails. Common nails have a wider diameter than box nails and may split 5/4” deck boards.
Can I use a nail gun for decking?
Use a nail gun primarily for affixing the decking and trim (or fascia) boards, with stainless-steel-finish nails to avoid rusting. For adequate penetration, nails should be one-and-a-half inches longer than the boards.
What is the proper gap between deck boards?
Proper wood deck board spacing should have at least a 1/8 inch gap after the decking has dried out. If you install your wood or treated deck boards while they are still wet boards, then they should be attached without a gap between them.
Should I leave a gap between decking boards?
Proper Gap between Decking Boards When installing decking boards, make sure to leave 1/4 to 1/8 inch gaps in between them. This gap will make sure that the decking can breathe, have sufficient drainage, and make it easier to clean.How long should deck screws be?
Most decking screws are 8-gauge and, while 2 1/2 inches is the minimum length needed to hold decking boards to the joists, 3-inch screws are commonly used to provide extra holding power against the upward pressure of shrinking or warping boards. Specialty decking materials have different requirements.
Which side of deck board should face up?Lay deck boards so that the best-looking face is facing up! Wood is stable when its moisture content is held above 30%(fiber saturation point). As wood dries below 30% it shrinks. Wood shrinks and swells twice as much in the direction parallel to the growth rings as it does perpendicular to the growth rings.
Article first time published onWhere do you start laying deck boards?
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. Then measure when you’re 4 to 5 ft. away from the house and adjust the gap sizes to be sure the last board is a consistent width.
Should deck boards run parallel or perpendicular to house?
Decking running parallel to the house makes the deck look wider and blends the deck into the house. If the decking runs perpendicular, the deck looks long and extending far out, away from the house.
Can you nail down deck boards?
Both screws and nails are reliable methods of setting down decking boards. It’s only a matter of preference when choosing which one to use. However, many professional builders advise against using a combination of screws and nails when installing decking.
Can I use a framing nailer for decking?
It is important that you use a nail gun that is right for building decks. … Framing nails come in 50mm, 63mm, 75mm and 90mm lengths. Shorter nails (brads) can be used for finishing elements, such as holding down decking boards, handrails or attaching trim elements.
What is a deck screw?
Deck Screws are specific screws used to hold a deck together. While they are typically 305 Stainless steel there are also some other considerations to make when buying.
What decking screws to use?
You need a different type of screw for each part of your deck. 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.
Should deck joists be 2x6 or 2x8?
For upper-level decks, 2×10 is recommended as the minimum size to use for strong guard post connections. 2×6 joists should only be used on ground-level decks that do not require, and will not provide for, any guards. … Most decking is not strong enough to support longer spans than 16″.
Can you put deck boards tight together?
Rot – Deck boards that are spaced too tightly together are more likely to trap dirt, debris and moisture, which is the perfect mixture for making rot. Water Drainage – Adequate gaps are needed for water drainage. Without it rot is more likely, mold can build up easily and slick boards can become hazardous.
Should I use deck boards or 2x6?
2×6 is thicker and is stronger, but is also more expensive. Spacing between deck boards provide a few critical functions. The primary function is to drain water from the deck. Gaps that are narrow (1/8”), can catch debris, specifically on top of the joists, and can be difficult to clean out.
How long should screws be for 5 4 decking?
Decking: Fasten 5/4 decking with 21/2-inch coated screws or 12d ringshank or spiral nails.
How many deck screws do I need?
The general rule of thumb for standard deck fasteners is 350 screws for every 100 square feet of decking, which is based on standard 6″ wide boards (5-1/2″ actual), and 16″ joist spacing.
What does GRK screws stand for?
oK – stupid question – whats GRK stand for? Green River Killer. BUIC Sep 01, 2007 02:55pm #16. GRK is a brand of high quality screws.
Can I use screws on joist hangers?
Outdoors use 16d double-dipped galvanized nails (or stainless steel when called for) for installing hangers. … The manufacturers agree: Never use galvanized deck screws or drywall screws to install joist hangers. Those screws don’t have the shank size and toughness to support joist loads.
How far can a deck board overhang a joist?
The American Wood Council states that cantilevers are limited to 1/4 the span of the joists. Joist Spacing (o.c.) Maximum allowable overhang cannot exceed 1/4 of the actual main span.
What happens if you don't leave gaps in decking?
Without the right deck spacing, the boards may expand, cup, and buckle out of place. … There is no reason to put a gap between the ends (also known as butt ends or butt joints) of wood deck boards. Wood, both softwood and hardwood, is dimensionally stable in length regardless of temperature, humidity or moisture content.
What size lumber is used for decking?
For the deck surface, you can use 2x4s, 2x6s, or 5/4x6s. The 5/4 decking (pronounced “five-quarter”), available in cedar and pressure-treated fir, is 1 inch thick and 5-1/2 inches wide with rounded edges that make for a splinter-free surface. Cedar 1x lumber usually has one rough side and one smooth side.
Should deck be Leveld or sloped?
What slope should a deck have? The answer is it depends if the deck is solid or not. A solid deck needs to be sloped between a 1/8″ (3mm) and ¼” (6mm) per foot to encourage water drainage. Decks with properly gapped decking boards require no slope as rain will naturally run off the boards even when level.
Does it matter which way you lay decking boards?
A board that is correctly installed right side up (or bark side down) will form a crown and allow water to run off the edges. If the board is installed wrong side up (or bark side up) it will curve up on the edges when dry and water can gather and sit in the cup. That is a recipe for wood rot and problems.
Is it a good idea to flip deck boards?
Flipping deck boards is a waste of time and energy. The reason for this is that if your composite deck boards are rotting on the surface chances are its even worse on the underside of the board.
How do you fix a splintered deck?
To repair splintered wood decks, first chisel and sand down the splinter. Next, fill the cracks on the surface with epoxy wood filler. Then finish by painting or applying two coats of restoration coating. Remember to schedule regular cleaning and maintenance practices to prevent the development of deck splinters.
Can I reuse my deck boards?
So, if your deck was built prior to 2004, reusing the lumber from that deck is likely a near impossibility. Reclaiming that old lumber could result in the release of those harmful chemicals and chipping or pulverizing those old deck boards would do the same thing.