You must gap Trex® decking, both end-to-end and width-to-width. Gapping is necessary for drainage and the slight thermal expansion and contraction of Trex decking boards.
Do you leave a gap between composite deck boards?
One of the most critical steps for properly securing composite decking in place is to make sure you have a 1/4-inch to 3/16-inch gap between the decking boards (don’t exceed 1/2 inch). This space is important for two reasons.
How much gap does a Trex need?
Important points about gapping All deck boards must always be installed with a 6mm side-to-side gap. The Trex Hideaway Hidden Fasteners automatically measure the 6mm gap between grooved edge boards but you must still ensure the 6mm gap with the square edge boards.
Does Trex decking expand?
Yes, composite decking materials do expand and contract in all directions, but not as much as real wood. Composites are resistant to moisture. Instead, they change in size due to temperature. It will expand when under a hot temperature, while it will contract in the cold.Should deck boards be butted together?
We recommend butting treated deck boards together because as the moisture dries from the wood, the boards will shrink and naturally form gaps to allow water drainage. (Depending on moisture content, cedar, cypress and especially hardwood decking may require deliberate spacing for consistent joint sizes.)
How do you fill space between deck boards?
While you might be tempted to fill in gaps in your decking with wood filler or caulk, the natural movement of the boards can eventually cause the materials to break loose and make the gaps even worse. However, you can use rope to easily fill the gaps.
What should the gap be 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. For the gaps, you can use different tools to help you.
How much overhang should a Trex deck have?
Trex is a popular composite material with a maximum overhang of 102mm or around 4 inches. Between one and two inches of deck board overhang is ideal when you attach an outer fascia board, or at least 1 ¾” to 2 ¾” of overhang before installing the fascia.What should deck joist spacing be?
Deck joist spacing should never exceed 16″ on center (with the exception of MAX deck boards, which allow for maximum 24″ on center). For a more rigid feel, 12″ or less may be preferred. If adding additional framing, be sure to keep all boards level and in plane across the tops.
Does composite decking shrink or expand?Any composite decking will expand and contract, its really just a matter of how much it expands and contracts and at what temperatures. For most composite decking there is neglible expansion and contraction in the width of the board, however the expansion and contraction occurs in the length of the board.
Article first time published onHow much will Trex expand?
For Trex decking, the recommended end-to-end and side gaps range from 1/8 inch to 3/16 inch, depending on the temperature during installation. The gap against the permanent structure ranges from 1/4 inch to 1/2 inch, depending on the installation temperature.
What is the expansion gap for composite decking?
Make sure the composite deck boards do not over hang the joist at the edge by more than 20mm and a 20mm expansion gap should be left between the wall or other fixed objects surrounding the composite deck.
How do you fix a gap in a composite deck?
Fill small holes, using a putty knife, with a mixture of fine composite board shavings and silicone caulk. The consistency of the mixture should be thick enough that it will not seep out of the bottom of the hole. Match the color of the caulk to the deck boards.
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. … More Boards – Decking that is spaced closer together will have more boards.
Can composite decking be butted together?
Composite decking should not be staggered on a deck. Staggered decking requires butt joints, but composite decking expands and contracts with temperature changes making butt joints unsightly. … Ways to install composite decking that do not require butt joints.
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.
Should deck boards be parallel to the 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.
How do you fill cracks between boards?
- Cut the Strips. Measure the width and length of each gap between floorboards. …
- Glue the Strips in Place. Apply wood glue to the sides of each strip and gently tap it into the gap, using a mallet or hammer. …
- Sand and Stain the Strips.
Why do deck boards crack?
Constant exposure to moisture and heat causes wood deck boards to crack, and small or hairline cracks are an unavoidable consequence of your deck’s aging process. The wood gets wet, soaks up the water, expands and then drys out, contracting and shrinking, causing cracks in the surface of the wood.
How far apart should joists be for Trex decking?
The majority of composite deck board brands including Trex, TimberTech, and more require deck joists spacing to be at 16 inches O.C. (on center) for standard straight composite decking installation.
Are 2x6 OK for deck joists?
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″. Some builders reduce joist spacing to 12″ on center to strengthen the deck frame or to increase maximum allowable joist spans.
How far can a 5 4 deck board overhang?
The edge of decking should never overhang more than one-third of the decking material. For your standard 5.5” decking, that is 1 ¾” overhang.
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.
How do you stagger Trex decking?
“Stagger your boards so their ends are in different spots.” Slide the next board in so it’s parallel to the first. The sliding motion is important, as you want the spacer to fit in the groove of this board, too. Basically, you’ll have two boards with the spacer between them.
How do you hide gaps under decking?
- Lattice.
- Fence boards.
- Vinyl siding.
- Composite fascia boards.
- Stone faux.
Can you caulk Trex decking?
Trex RainEscape Butyl Caulk is specially designed for use with Trex RainEscape Down Spouts (choose Tan or Black) and Troughs (also available in Tan or Black) on floor joist, rim joist, and ledger board overlaps.
Should deck screw holes be filled?
To give your deck a polished and professional look, you’ll want to fill in any holes left by erroneously placed screws as well as the small gaps above screws that you have countersunk into the deck.
