Here you will find answers to common questions about everything from laying deck boards to estimating linear meters and choosing a foundation.
Which direction should deck boards run relative to the house?
Deck boards are usually laid across the house — parallel with its short side. That often gives the best water runoff, a tidy visual look, and good support from the joists underneath.
How much gap should there be between deck boards?
For regular wooden deck boards, 3–5 mm (about 1/8–3/16 in) is a good starting point, adjusted for how moist the boards are. It ensures drainage and gives the wood room to move with weather and moisture. Use spacer blocks for an even result.
What does linear meters (or linear feet) mean?
Linear measurement is a measure of length. One linear meter equals one meter of deck board, regardless of width. It is used to estimate the total amount of decking — at 120 mm board width, figure about 8.3 linear meters per m².
What is a deck foundation?
The foundation is what the deck is built on — for example posts, post anchors, concrete blocks, or a framed substructure. A good foundation provides stability and reduces the risk of the deck settling over time.
How do I know how many deck boards I need?
Use the deck calculator. Enter the area and board width, and you get a quick estimate in linear meters plus a screw count.
What is the difference between a ground-level platform and a raised deck?
A ground-level platform is usually built directly on the ground, while a raised deck often needs a more substantial foundation. The function and material choices can still be quite similar.
Can I build a deck without a permit?
Many smaller, low decks are exempt from permit requirements, but the rules vary by country and municipality — always check your local regulations before you start. See our guide to deck permits.
What screws should I use for deck boards?
Use stainless or marine-grade deck screws. A common rule of thumb is that the screw should be about 2.5 times the board thickness, often around 4.5–5 mm x 55–75 mm (roughly #9–#10 x 2 1/4–3 in).
What kind of wood should I choose for a deck?
Pressure-treated softwood is an affordable, common choice. Other options include factory oil-treated wood, composite, oak, and lower-maintenance modified woods such as thermally treated or acetylated boards.
How do I work out joist spacing for a deck?
A common rule of thumb is 60 cm (24 in) between joists, measured center to center. With narrower boards or heavy loads, tighter spacing — 40 cm (16 in) — is a smart move.
Why is it important to have a slope on the deck?
A fall of roughly 1–2 % away from the house wall helps rainwater drain off and reduces the risk of moisture damage.
How do I maintain deck boards?
Clean the deck at least once a year with a suitable deck cleaner. Stain or oil as needed, often every 2–4 years. Composite usually requires less upkeep. See also our guide to deck maintenance through the year.
How do I make the deck cozier?
Use textiles, plants, lighting, and distinct zones. It often takes surprisingly little to create a warm, inviting outdoor space. You can also find ideas in the article on decking accessories and outdoor details.
What kind of lighting suits a deck?
Recessed LED lights, wall fixtures, and LED strips are popular choices. A warm color temperature around 2700K usually creates a cozier mood than cooler light.
How do I expand an existing deck?
Measure the area you want to add, build a new foundation, and decide whether to use the same board type or a deliberate contrast. Remember to recalculate the material quantities before you start.