QA

How To Install Composite Decking Boards

Is composite decking easy to install?

Composite decking is relatively easy to install if you have planned your layout accurately and have a solid timber frame as a base. The deck boards fit to the frame using specific fasteners and screws.

Do you leave a gap between composite deck boards?

As temperatures fluctuate, composite deck boards will naturally experience thermal expansion and contraction. That’s why the board ends should never be installed tight against one another. There should always be a slight gap.

Do you screw down composite decking?

The answer is yes for a solid composite decking (must be pre-drill and must check with manufacture). You can not drill or screw through a hollow composite deck as the screw will become loose and rise in time . Like the usual wooden decking boards, you can also screw down a solid composite decking.

Do you need a special saw blade to cut composite decking?

Table saw blades with a 7 to 9 inch diameter and few teeth are best for cutting composite decking. Blades made specifically for cutting composite decking usually have a tooth design that makes them unique from the other ones. The material that is going to be cut should be kept in mind when selecting a jigsaw blade.

Where do you start laying composite decking boards?

To install composite decking with a hidden fastening system, start at the house by face-screwing the first board. Next, screw a hidden fastener clip into the groove on top of each joist. Then, slide the groove of the next board into the clips and tighten with a rubber mallet.

What do you put under composite decking?

However, you will need a good base for the composite decking. Many use concrete flooring and concrete slabs for an even and stable base. Some also use adjustable pedestals. Using pressure-treated wood or composites will make a strong and durable frame.

How do you edge a composite deck?

How to finish the edge of a composite decking is simple if you use picture framing to cover the board edges. You can also paint the edges, glue a veneer cap to the ends, attach a raised fascia board or add a composite corner trim to create a consistent look.

Can composite decking be put directly on the ground?

Composite lumber is highly resistant to rot and impervious to insects so is an acceptable choice ground contact.

How far apart should joists be for composite decking?

Most composite and PVC decking brands, like Trex and Azek, recommend a maximum joist spacing of 16 inches OC. Some brands, like WearDeck, let you get away with more – reinforced with a layer of fiberglass on both the top and bottom, WearDeck boards easily allow for spans of 24 inches OC.

How much space do you need 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 should you stagger deck boards?

A common method for staggering a deck is to start the first row with a full plank, then cut one-third of the next row’s first board off the end. The row after that has an additional one-third cut off and then repeat when you get back to a full board.

What are the problems with composite decking?

Common complaints from homeowners include their composite decking board swelling, shifting, warping, and shrinking. The cause of this isn’t exactly clear, but it’s suggested that the composite nature of the decking leads it to be much more sensitive to temperature and humidity swings as well as sun exposure.

Can you but composite decking together?

Yes, additional framing is required for staggering decking. Composite decking needs the full 1 ½” (38mm) of framing to support the ends. If you stagger the joints, an additional block will need to be added to the joist to support the decking.

Do you have to use hidden fasteners on composite decking?

If you are using a composite or PVC decking material for the flooring material and you decide to use face screws, do you have to use a screw designed specifically for composite materials? No, you don’t.

How do you fill screw holes in composite decking?

For plastic or composite decking, use an epoxy filler to fill screw holes. Mix the epoxy with thinner and use a syringe to fill the holes. Allow the epoxy to dry, then sand it so that it is flush with the deck. Wear a mask while sanding because the epoxy dust is dangerous to breathe in.

Should you pre-drill composite decking?

Do I Need to Pre-Drill My Composite or Capstock Decking? In the past, no matter what type of deck board you were installing, the answer to this question would indefinitely be yes. However, with advancements in fastener technology, pre-drilling in most composite and capstock deck boards is no longer necessary.

Do you need to seal cut ends of composite decking?

Kim Katwijk The cut ends of composite decking will absorb moisture and can swell, as shown here. Sealing the end cuts with lumber wax will help prevent swelling. Because the uncapped ends of the boards are free to pick up water, the core can absorb moisture, which can lead to all sorts of problems.

How many teeth do I need to cut composite decking?

What is the Best Saw Blade for Cutting Composite Decking? The EnviroBuild installation guide advises the use of a circular saw using a 40 tooth alternate top bevel finish blade to cut your composite decking boards.