What composite decking is
Composite decking is a factory made board. It is not solid wood. The core blends wood fibre and plastic. The outside may have a cap.
That build gives the board a set colour and a set texture. It also makes the board heavier than a pine board of the same size. It expands and shrinks with heat in a different way from wood, so fixings and gaps must follow the maker rules.
Composite is a surface choice. The frame below is usually still pressure treated wood. In wet ground contact spots, some builders discuss other frame options. Your provider can explain local practice.
Where composite suits a home
Composite suits owners who do not want to sand and coat a deck every few years. It suits rental homes where upkeep visits are hard to plan. It suits shaded yards where wood stays damp and marks fast.
It is also a common choice in a deck replacement, where new boards go on a new or checked frame for a long service span.
Composite may be a poor fit if you want to change colour often. You cannot stain it a new colour like wood. Pick the colour as a long term choice.
Types of board
Uncapped boards. The mix runs through the whole board. These cost less. They can absorb more water at the surface and may fade or mark sooner.
Capped boards. A plastic shell covers the top and often the sides. The cap resists stains and fading better. These boards cost more. Most mid and high ranges sold now are capped.
Grooved or square edge. Grooved boards use hidden clips between boards. Square edge boards are screwed through the face. Grooved gives a clean look with no screw heads on the main field. Stairs and picture frame edges often use square edge boards in the same range.
Board width and texture. Wide boards cover area fast but show expansion gaps more. Deep grain textures can hold dirt in shade. Smooth textures clean easier but can feel slick when wet. Look at a full board, not a small chip.
Process for a composite deck
The early steps match any deck build. Measure, design, permit and frame. The frame step is stricter here. Joist spacing must match the board spec. Stairs may need tighter spacing still.
Boards are cut with care to keep the cap clean. End cuts may need sealing if the maker asks for it. Gaps at board ends change with temperature on the day of fitting, so a good installer sets gaps for that season.
Rails can be composite, metal or wood. Many owners pick composite or metal rails to keep upkeep low across the whole deck, not just the floor.
The final step is a wash and a handover of care notes. Keep the board name, colour and batch note. A spare board from the same run helps if a board is damaged years later.
Colour, heat and light
Colour choice is not just style. Dark brown and dark grey boards heat up in sun. South and west facing decks feel this most. Bare feet and pets notice it first.
Light boards show dirt more in shaded yards. Mid tones hide dust and pollen best in many areas.
Fading is slower on capped boards, but no outdoor board keeps a showroom colour for life. Ask what change the maker expects over the first years.
Cost factors
Board range is the main cost lever. Entry boards cost less but have thinner caps. Top ranges cost much more per foot. Hidden fixings add parts and time.
Frame changes add cost. If joists must be added or the frame is new, include that in the comparison with wood. Waste also differs. Composite cuts should be planned to reduce offcuts, as boards come in set lengths.
Ask for the price per deck, not per board alone. The quote should list boards, fixings, frame, rails, stairs and permit work as one clear scope. Compare that with the wood quote for the same plan.
Care and repair
Wash the deck at least once a year. In shade, wash more often to stop film building up. Move pots and mats now and then, so the surface dries evenly.
A damaged composite board can be replaced, but colour match may not be exact after years of sun. Hidden clip systems need the right method to lift a mid deck board. Ask the provider to show you how a single board swap works on your system.
Do not paint or seal composite boards unless the maker says you can. Most say no.
How to choose a provider
Ask if the provider fits this board range often. Ask who follows the maker spacing and gap rules. Ask for the warranty papers. Note there are two sorts. The maker covers the board. The provider covers their work. They are not the same thing, and DeckNear does not extend either one.
Start with your city page for local weather notes, then this page for the board choice.
Cities for this service
Related services: deck building, deck replacement, deck repair.
How our referral works
Tell us your city and that you want composite. We connect you to a local provider who fits those boards. You pay DeckNear nothing. Providers may pay us for the referral.
Frequently asked questions
What is composite decking made of?
Most composite boards mix wood fibre with plastic. Some boards have a hard plastic cap on the top and sides. That cap helps resist stains and fading. The mix and the cap differ by brand and by price range. Ask your provider for the exact board name and the care sheet for that board before you agree.
Does composite decking get hot in sun?
Dark boards can get hot in direct summer sun. Light colours stay cooler. Shade, air flow and the board brand all change the result. If your deck faces full afternoon sun, ask to stand on a sample board left in the sun, or choose a lighter colour and plan shade for the seating area.
Can composite boards go on my old wood frame?
Only if the frame is sound and the joist spacing fits the board. Many composite boards need joists closer together than old wood boards did, in particular on stairs and on diagonal layouts. The provider must measure spacing and check for rot. Adding joists is possible, but it adds cost to a resurface quote.
How do I clean composite decking?
Most boards need only a wash with water and a mild cleaner and a soft brush. You do not stain or seal composite boards. Food spills should be wiped soon, as some boards can mark. Avoid harsh solvents unless the maker allows them. Keep the maker guide, because cleaning rules vary and a wrong product can void cover.
Is composite worth the higher price?
It depends on how long you plan to stay and how much upkeep you want. Composite costs more on day one and less in time and coatings over the years. Wood costs less on day one and asks for regular care. Price both for the same deck size and compare the total work over ten years, not just the first bill.
Common questions
What is composite decking made of?
Most composite boards mix wood fibre with plastic. Some boards have a hard plastic cap on the top and sides. That cap helps resist stains and fading. The mix and the cap differ by brand and by price range. Ask your provider for the exact board name and the care sheet for that board before you agree.
Does composite decking get hot in sun?
Dark boards can get hot in direct summer sun. Light colours stay cooler. Shade, air flow and the board brand all change the result. If your deck faces full afternoon sun, ask to stand on a sample board left in the sun, or choose a lighter colour and plan shade for the seating area.
Can composite boards go on my old wood frame?
Only if the frame is sound and the joist spacing fits the board. Many composite boards need joists closer together than old wood boards did, in particular on stairs and on diagonal layouts. The provider must measure spacing and check for rot. Adding joists is possible, but it adds cost to a resurface quote.
How do I clean composite decking?
Most boards need only a wash with water and a mild cleaner and a soft brush. You do not stain or seal composite boards. Food spills should be wiped soon, as some boards can mark. Avoid harsh solvents unless the maker allows them. Keep the maker guide, because cleaning rules vary and a wrong product can void cover.
Is composite worth the higher price?
It depends on how long you plan to stay and how much upkeep you want. Composite costs more on day one and less in time and coatings over the years. Wood costs less on day one and asks for regular care. Price both for the same deck size and compare the total work over ten years, not just the first bill.