Composite Decking vs Timber: Which Is Right for Your Glasgow Garden?

Decking is one of the highest-impact things you can do to a garden. Done properly it adds a genuine outdoor room to the house; done badly it is a slippery, sagging platform you avoid from October onwards. The question we field at nearly every garden survey is the same one: composite or timber?

There is no single right answer, but there is usually a right answer for your garden. Here is how we talk it through with customers across Glasgow and Lanarkshire.

Timber decking: cheaper up front, but it asks something of you

Pressure-treated softwood is the lower-cost option at installation, and it has one advantage composite cannot match: you can change its colour. Re-stain it in a different tone in five years and the deck reads as new. Some customers value that flexibility a great deal.

The trade-off is maintenance, and in the west of Scotland that is not a token commitment. Timber decking wants cleaning and re-treating every year or two to stop it greying, cupping, splitting and going green with algae. Keep on top of it and a well-built timber deck lasts a long time. Let two or three wet winters pass without treatment and the lifespan drops sharply, along with the grip underfoot.

Composite decking: more up front, almost nothing after

Composite boards combine recycled wood fibre with plastic. They cost more per square metre, and they will not take a stain, so you commit to the colour on day one. In exchange there is no sanding, no annual treatment, far better resistance to rot and splintering, and considerably less algae to deal with on a north-facing deck.

Over a ten to fifteen year horizon, on a deck that gets constant rain and realistically will not be treated every spring, composite tends to come out ahead on total cost rather than just installed cost. That is the comparison worth running, and it is the one people most often skip.

The part that matters more than the boards

Whichever surface you choose, the sub-frame decides whether the deck is still solid in five years. Every deck we build starts with a properly engineered frame on concrete pads or screw-pile foundations, with joist spacing set for the board type and ventilation underneath so moisture can escape. Boards screwed to whatever happens to be lying in the garden is not a deck, it is a countdown.

The same logic runs through the rest of our outdoor work. A timber fence is only as good as its post fixings, and a garden room or outbuilding is only as good as its base. Getting the invisible structure right is most of the job.

How the deck connects to the house

Where a deck meets the building is worth planning early. Levels need to sit below the damp-proof course, drainage has to run away from the wall, and if the deck is being built to serve new bi-fold or French doors, the threshold detail should be agreed before either job starts. If decking forms part of a wider project such as an extension or a full home renovation, sequencing it correctly saves rework and, usually, money.

Our honest recommendation

For a deck that adjoins the house and gets used daily, we generally point people toward composite, because low maintenance matches how those spaces actually get lived in. For a smaller, more occasional feature further down the garden, good timber on a good frame is still an easy recommendation, and it leaves budget for the fencing or lighting around it.

What we will not do is default to the pricier option. You will get a straight answer for your specific garden, aspect and budget at the survey. See more on our garden rooms and decking page, look at decking we build in Hamilton, or ask for a free quote.