Annexe Knowledgebase

Your choice of timber for your annexe decking will have an impact on its long-term usability — and the best ways around the issue of slipping.

Of course, even if you are a lawn lover, there is no reason why you cannot have both lawn and decking in your garden. This is in fact the ideal way to define different areas of the outdoor space you have available. It provides a great surface for an outdoor seating area, around a swimming pool or maybe a hot tub, plus it is quick and easy to install and fairly cost effective to boot.

It is also an excellent solution for those dealing with sloping sites — turning fairly unusable garden space into a stable, level and useful area. Timber decking can work well when used to create pathways and steps — blending nicely with other natural materials in the garden.

Isn’t Decking Slippery and Rot-Prone Though?

Decking can be slippery, and prone to rot, too. What you need to bear in mind is that choosing the right timber for your decking is essential in ensuring that you are able to enjoy it for many years to come.

In terms of preventing it from rotting, warping or cracking look for a timber that has the DeckMark symbol from the Timber Decking Association — this is a good indicator of the use of high-quality materials with good guarantees.

Softwoods such as pine and spruce will be the cheaper option, but must be properly treated with a wood preservative — as should any cuts in the wood. Cedar is an ideal softwood choice, being naturally weather-resistant.

It is the hardwoods though that have seen a growth in their popularity recently, with species such as oak and teak giving a stylish and contemporary feel, while also offering plenty of durability and stability — essential qualities for timber decking to remain looking good.

Other good choices include birch, elm, maple and cherry. Both treated softwoods and hardwoods can be expected to last for around 25 years if well maintained.

So, what about it becoming slippery? Yes, timber decking can in the wetter months become a little bit like an ice rink. There are various ways around this:

Some swear by pressure washing a couple of times a year to remove algae build-up, although others believe this will lead to the timber rotting at a faster rate. There are gentler deck cleaning solutions available which are worth a look.

Others suggest securing chicken wire to the surface — effective, but not necessarily attractive.

There are also products on the market specifically tailored to deal with the problem, such as GripDeck. These are anti-slip aluminium inserts that are easy to fit and blend in well.

• Expect to pay £30-£70/m² for decking boards.
• For installation, a two-man decking company will ask around £500 for a typical patio.
• As long as your decking is no more than 30cm above the ground and covers no more than half the garden area, it won’t require planning permission. If your deck requires planning permission it will also require Building Regulations approval.

Designing your Landscaping Scheme

Smart ideas to make sure your decking is as effective as possible — and what style suits your house best

Although there are problems associated with timber decking, most are easily avoided. Ensure that your decking sits well within your scheme by choosing the right product for the right area. Grooved and ribbed finishes seem to blend in nicely with more traditional garden schemes, while smooth finishes add to the crisp nature of a contemporary outdoor space.

Remember, there is no reason why you have to stick to straight lines. Boards can be fitted diagonally or even in herringbone patterns to create a tailored look. Look at the surrounding materials, too — timber decking fitted near an expanse of timber fencing can all look a bit much, but combined with glass balustrades or lush hedges, can really add something.

When planning your deck, think about the effect you want it to have on the overall appearance of your home. Deck boards placed at right angles to your home tend to draw the eye out towards the garden, while those that run parallel will add a sense of width to the house.

How to Install Decking

• In order to prevent your new deck being plagued by weeds, lay a deck fabric over the earth before the deck is fitted.
• Ensure that the framework for the deck is laid on to concrete foundations rather than directly on to the soil for added stability.
• For water run-off, the deck should gently slope away from the house — a 10mm drop for every metre of deck is ideal.

If you are installing decking in a shady spot, bear in mind that it will not be able to dry out in the sun and it will spend much of the time damp and so more prone to algae, dirt and moss build-up. Choose a non-slip product and clean the deck with a deck cleaning solution regularly to keep it in good, usable condition, and re-treat the deck afterwards. You should also check your decking regularly for any loose boards and splintered wood, and repair where necessary.

Always use purpose-made stainless steel or galvanised screws so that your decking is not ruined by rust stains.

Low-Maintenance Alternatives to Timber Decking

If you are concerned about the maintenance involved with timber decking, you could opt for an alternative material. In the main, these are either composites or PVCu.

• PVCu products are cheaper than timber, yet lack the natural appearance.
• Composite decking is made from wood fibres combined with polymer resins and offers a non- or low-slip surface. It’s also maintenance free — no sanding or sealing required.

If it is a wholly earthy and natural appearance you are hoping to achieve, then timber wins hands down, but in contemporary schemes a composite often works well.