Should you leave gaps between decking?
Matthew Barrera
Score: 4.2/5 (41 votes)
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.
What happens if you don't space deck boards?
Without the right deck spacing, the boards may expand, cup, and buckle out of place. As a result, you may have to replace broken decking, or reinstall the boards with wider spacing to prevent further cupping and buckling, which can be time consuming and expensive.
Why is there a space between deck boards?
The most important reason to have a spacing gap is to allow the boards the room to expand and contract naturally. Wood, by nature, expands and contracts when there are seasonal humidity changes and the wood begins to absorb or expel moisture.
Can you lay decking with no gaps?
Proper deck board spacing should have a 1/8-inch gap after the decking has dried out. If you install your decking using wet boards, pressure-treated decking that has not yet dried out, then you should install them with no gap as a gap will be created as they dry and shrink. Deck spacing isn't anything to take lightly.
Do deck boards shrink or expand?
Deck boards can both shrink and expand. This is why it is necessary to leave appropriate spacing between them when building a deck. Most deck boards are pressure treated, which means they will be somewhat wet when they're new.
How to Space Deck Boards
Do you need to leave a gap between composite decking 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.
What can I use for deck board spacers?
Sixteen-penny nails work great as spacers when you're installing deck boards, but they often fall through the cracks. Keep the nails in place by pounding them through plastic jar covers. They're easier to move and will stay up on the deck instead of falling on the ground.
Do decking boards expand?
Any type of decking board will expand and shrink, whether it's wood, plastic, or composites. ... However, they don't change in size as much as wood or plastic. Wood fibres hold the shape when the composite undergoes thermal expansion, while the plastic fibres do the same when moisture is involved.
How much gap should be between decking joists?
For residential decking, the joist space should not exceed 16 inches as measured on the centre. But if you want a more rigid feel for your decking, you can space the joist by 12 inches on the centre. Additionally, for commercial deckings, the standard joist spacing is 12 inches on the centre.
What is the gap between decking boards UK?
You need an expansion gap of 5-8mm between the boards. If you are going to build your decking next to a house then make sure it's 150mm below the damp-proof course and that you don't cover any air bricks. Try to plan your deck to fit only whole boards, to avoid having to awkwardly cut a board lengthways to fill a gap.
Should you space 5 4 decking?
For 5/4 pressure treated decking, it should be installed tight and allowed to shrink to provide water drainage. With cedar 5/4 decking installation should be with 1/16″-1/8″ gap (2-3mm), which will expand to 1/8-1/4″ (3-6mm) once the wood has dried. ... Providing both deckings' plenty of spacing for drainage.
Is it better to nail or screw 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.
How much space do you need between pressure treated decks?
Leave Gap: If the pressure treated wood has been kiln dried after treatment (KDAT), leave a 1/8” gap (the thickness of an 8-penny nail) between the boards when attaching, since the wood will expand slightly over time.
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.
Does composite decking shrink and expand?
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. ... Quality composite decking should very very minimal shrinkage if manufactured correctly.
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.
What is a spacer for decking?
Our Product. Deck2wall® Spacers (D2W) are polypropylene spacers designed to be installed between a deck and house. This allows water and debris to flow between the ledger and the house, promotes circulation and drying, and helps prevent rot.
Do you screw deck boards to every joist?
Start the installation by securing each board with a few screws to keep them in place. ... Once all of the decking is in place, snap a chalk line so that the screws can be installed in straight rows over the underlying framing. Each board should recieve 2 screws per joist, spaced about an inch from each edge.
Does raised decking need planning permission?
Garden decking or the creation of other hard surfaces are exempt from planning permission provided that the ground level is not altered or raised by more than 1m.
Can I use 4x2 for decking frame?
These decking joists are the most common sized framing timber for decking. ... They provide a solid structure for fixing your decking boards too. When making your decking frame you should use a 400mm spacing between your timber joists.
Do I need noggins in decking?
Most decks will not require the noggins, although it is advisable to always add a couple.
How often do you need noggins in decking?
I would say it has more to do with the framework, if you used 4x2, i would noggin every 1500, but in your case stick it in the middle, If you used 6x2, i wouldn't worry, noggins should be placed every 2m if over 2m.
