Table of Contents
Ideally, with most wood, you want to leave about an 1/8-inch gap between boards after the decking has dried. You can use a spacer to make sure you’re consistent throughout the whole deck. Pressure-treated lumber is usually wet when you install it, so you should install those boards tightly together.
What is the 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 deck can breathe, have sufficient drainage, and make it easier to clean.
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.).
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.
What happens if you don’t leave gaps in decking?
Rain can prove especially detrimental to wood decking if it doesn’t have a place to drain off the deck. When there are no gaps between the boards, this moisture remains trapped which can lead to issues like rot and mold.
Should I leave a space between pressure treated deck boards?
Ideally, with most wood, you want to leave about an 1/8-inch gap between boards after the decking has dried. You can use a spacer to make sure you’re consistent throughout the whole deck. Pressure-treated lumber is usually wet when you install it, so you should install those boards tightly together.
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 you space pressure treated deck boards?
Regular pressure treated wood tends to be somewhat wet when it’s new. In this case, some space between the boards is a good idea because the wood can actually expand slightly over time. The folks at YellaWood, recommend using an eight penny nail between rows to create adequate consistent spacing.
Can I use 4×2 for decking frame?
4 x 2 Timber Rail / Joist 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.
What is the correct way to lay decking boards?
Any decking board manufacturer or professional will tell you: “The proper way to install a decking board is ridge side down.” The ridges are designed to allow for airflow, to stop moisture sitting in the ridge, and allow for a stronger structure.
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.
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.
Why do decks have gaps?
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 install composite decking without gaps?
When you install a composite deck, especially if you do the DIY route, you have to remember to leave a gap between composite decking boards. With too much air, it can also decrease your deck’s resistance to fire.
Does pressure-treated wood expand and contract?
Over time, most treated lumber will shrink slightly across its width as it dries out. Take this small amount of shrinkage into account when laying decking or fence boards. After being outdoors for six to 12 months, treated lumber will develop cracks, called “checks,” along the surface of each board.
Does pressure-treated wood shrink in length?
Even products that are sealed and treated are going to shrink. This most typically occurs across the width of boards, so builders should take into consideration the fact that their lumber will shrink over time. Additionally, as part of the drying stage of treated wood, the boards will crack, also referred to as checks.
Should I space 2×6 deck boards?
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 do you seal gaps 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.
How much do treated deck boards shrink?
This way, the boards will expand over the rest of the humid season and then shrink once the dry seasons arrive, leaving an appropriate gap. If you’re using pressure-treated boards, you might want to leave a smaller gap of about 1/8 in (0.32 cm).
How do you keep pressure-treated wood from warping?
To keep pressure-treated wood from warping you will need to apply a stain. The stain will protect against water so the wood will not expand. Before you stain, ensure the wood is dry. Place a couple of drops of water on the wood, if the wood absorbs the water, it’s ready to be stained.
