Decking Designs

Construction

Step 2: Attach to House

• Attach a ledger joist to the wall using spacers for ventilation and drainage. This sets the height for your deck which must be at least 150mm (6in) below the damp proof course (DPC).
• Fix securely as the ledger is load-bearing - the best method will vary according to your property's construction so seek advice.

Step 3: Framework Construction

• Attach a joist at each end of the ledger using angle brackets or galvanised joist hangers and check that they are square.
• Fix supporting slabs at the ends of these joists, to hold them level. Lay on 100mm (4in) hardcore and 50mm (2in) sand, then mortar. Allow the mortar to harden while fixing other slabs in place to support other joists every 1.5m (5ft) intervals.
• Fit joist hangers (using galvanised nails or screws in every hole) along the ledger at 400mm (16in) intervals. Join to a further joist at the other end to form a supporting beam parallel with the ledger. Check that construction is square and level at all stages.
• Nail noggins 400mm (16in) apart between the joists to strengthen and stabilize the framework.
• Fit a second joist onto the end joist for further strength and join with coach bolts.

Tip: It is possible to use posts on concrete foundations or fence post bases if you wish to raise the deck.