Decking Installation in Great Shelford

What a decking installation actually involves

A well-built deck is mostly about what you cannot see once it is finished. The frame, the bearers, the posts and the way moisture is managed underneath all determine whether your deck stays solid or starts to rock and rot within a few years. The decking boards themselves are the last thing we fix into place, and they are the least complicated part of the job.

For a ground-level platform, we excavate slightly, lay a weed-suppressing membrane, set concrete pad foundations and build the frame from pressure-treated timber. For a raised structure - anything more than about 300mm off the ground - posts are set into the ground or into post supports, and the frame is braced to handle the load properly. Split-level decks follow the same principles at each tier.

How to choose a decking contractor in Great Shelford

Most problems with decking come back to who built it and how, not to the timber itself. Choosing well at the start saves a lot of money later. Here is what to look for and what to ask before you commit to anyone.

Ask to see previous work

Any contractor worth hiring should be able to show you finished decks they have built - photographs at a minimum, and ideally a job you can visit or at least verify is real. Ask how long ago each deck was built. A deck that looks good six weeks after installation tells you less than one that has been through two or three winters.

Ask exactly what timber they are quoting

Decking timber is not all the same. Pressure-treated softwood such as treated pine or larch is the most common choice for residential gardens and is perfectly suitable if the treatment specification is correct. The relevant standard is UC4 treatment for any timber in ground contact and UC3 for above-ground framing. If a contractor cannot tell you the treatment class they are specifying, that is a red flag. Hardwoods such as oak or iroko cost more but take stain and weathering differently, so be clear about what you are getting and why.

Ask about the subframe and foundations, not just the boards

Some contractors quote a low price by using undersized joists spaced too far apart, or by skipping proper pad foundations in favour of timber sitting on paving slabs. Ask specifically: what size joists, at what centres, and what foundations? For a standard garden deck, 47x100mm joists at 400mm centres is a reasonable minimum. Larger spans or heavier use need bigger sections.

Ask about ventilation and drainage underneath

Timber rots when moisture cannot escape. A ground-level deck needs enough clearance underneath - typically at least 50mm - for air to move through. If the frame sits too close to soil or an impermeable surface with no drainage gradient, you will get rot in the bearers within a few years regardless of how good the treatment is.

Ask whether they will remove existing materials

If there is old decking, a patio or vegetation to clear first, confirm whether clearance and disposal are included in the price. Some contractors quote for the deck only and leave the prep to you.

What a realistic price looks like

Timber decking installation in the UK typically costs between £120 and £200 per square metre, supply and fit, for a straightforward ground-level deck in treated softwood. Raised decks, hardwood, composite boards or complex shapes will push the price higher - sometimes to £250 per square metre or more. Be cautious of any quote significantly below this range: something is usually being cut from the spec.

Get the scope in writing before you agree

A written quote should specify the timber species and treatment class, the joist size and spacing, the type of foundations, the decking board profile and thickness, whether balustrades or steps are included, and what happens to any waste. If any of those details are missing, ask for them before you sign anything. A contractor who resists putting the spec in writing is one to walk away from.

What questions to ask on the day of survey

When someone comes to measure up, treat it as a two-way conversation. A few questions worth asking on the spot:

• Will the deck need planning permission or building regulations approval? Raised decks over 300mm close to a boundary sometimes do.
• How long will the job take, and will the site be left accessible between visits?
• How are fixings done - hidden clips or face-fixed screws? Hidden fixings look neater but add to the cost.
• What board profile do they recommend for your situation? Grooved boards drain better and are less slippery in wet weather.
• Is there any adjustment for ground level if the garden slopes?

Planning permission and building regulations

Most residential garden decks fall within permitted development, meaning no planning permission is needed. The main exceptions are decks that are raised more than 300mm above ground level and sit within 2 metres of a boundary, or any deck on a listed property or within a conservation area. Building regulations can also apply to raised decks, particularly around balustrade height and structural loading. If you are not sure whether your project needs approval, ask the contractor before work starts - not after.

Why we work across the Haverhill area including Great Shelford

Haverhill Fencers is based in Haverhill and installs decking for homeowners across the surrounding villages. If you are planning a deck in Great Shelford and want to talk through the options, call us to arrange a visit and get a proper look at what the job involves before any figures are agreed.