- If you’ve not got an overhang or it’s a fixed deck, fit starter clips along the outside edge of the frame and secure with screws provided with the composite decking. If you are working with an overhang, put the first board into position not exceeding 25mm. If you’re adding a fascia, put an off-cut of board under the overhang so you know it’ll be flush with the fascia.
- Pre-drill all fixing points, measuring in 30mm from the edge of the board. Secure the board to the joist below with composite decking screws.
- Slide a hidden fastener clip in so it sits within the groove of the deck board. It needs to be in the centre of the joist to keep the boards secure and ensure an expansion gap of 6mm. Tighten the clips until just tight, and repeat so there’s a clip at every joist.
- Add the next board, ensuring that the fastener clips sit within the groove – make sure you don’t force it. Repeat step 3.
- Continue steps 3 and 4 until you’re at the final board, which you should secure in the same way as you did the first.
Wooden Decking in Castlewellan
Discover Wooden Decking Prices in Castlewellan
Wooden Decking in Castlewellan
Wooden decking is an increasingly common choice for providing outdoor seating areas in gardens. Due to the natural beauty of wood, they can be very elegant areas that can be used year round by installing external heating and lighting. Wooden decking is typically fitted in locations in front of patio or French doors where they can create a seamless transition between inside and outside spaces. Wooden decking is available in any size or shape to accommodate any area. Curved designs or large areas connected by pathways can produce a stunning effect. Wooden decking is relatively quick to install and causes little disruption, especially in comparison to alternatives like patio or paving. It can even be installed over the top of a pre-existing patio. It is necessary however to be certain that your wooden decking is structurally sound and able to take the load of any furniture or plants that you would like to use on the decking. There is a choice of species of wood that can be used in wooden decking. Normally decking is constructed from hardwood, but there are softwoods available that fulfil the durability specifications. As hardwood decking will demand maintenance, which typically includes annual cleaning and staining for weather proofing, composite woods are becoming popular for use in wooden decking because they are stronger and require significantly less maintenance.
Average Wooden decking cost in Castlewellan
The typical cost of Wooden decking is £1500. Costs can change based upon the materials and the firm hired. The upper price range can be as high as £1725. The material costs are commonly approximately £375
Average price per Wooden decking job in 2025
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£1900
£1425
£950
£475
£0
Wooden decking installation cost in Castlewellan 2025
Labour cost | £1,050 | |
Material cost | £375 | |
Waste removal | £75 |
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FAQs
- Calculate the surface area for your decking Multiply the length (L) of your decking area by the width (W): L x W = Decking Surface Area (DSA) in m2 10 x 6 = 60m2
- Work out the coverage of your deck boards Add your deck board width (DBW) to the expansion gap length (EGL), then add the deck board length (DBL) to the expansion gap width (EGW). Then multiply these numbers. (DBW + EGL) x (DBL + EGW) = Single Board Coverage (SBC) 0.144m + 0.005m = 0.149m 2.4m + 0.003m = 2.403m 0.149 x 2.403 = 0.358m2
- Calculate the number of deck boards you need Multiply the SBC by 1.1 to allow for 10% wastage. Then, divide the DSA by the SBC. DSA / SCB x 1.1 = Total number of boards required 60m2 / 0.358m2 x 1.1 = 184.36 boards – so round up to 185 so you’re not left short.
- Paving slabs – old or cheap ones are fine
- Timber for the frame and legs
- Type 1 MOT hardcore
- Mark out the area as we explain in ‘How to lay decking’. Then, dig to 200mm below where you want to surface of the decking to be.
- Add a 50mm layer of hardcore and make sure it’s compact.
- Build the decking sub-frame as we describe in ‘How to build a deck frame’.
- Lay out paving slabs along the edges and in the centre of the area. This will help to spread the weight of the decking.
- Set the decking frame on the slabs, checking for high or low points and adding off-cuts of timber where needed. Don’t forget to sand and seal these off-cuts with decking preservative.
- Add your joists and then the deck boards, leaving the recommended gaps of expansion of between 5-8mm.
Yes, although you should make sure that the terrace or decking is able to support the weight of a hot tub. Usually, you will need to have a structural survey carried out on the area. Seek the advise of a hot tub retailer or installer about the logistics of installing one at your property.

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