Composite Decking Replacement in Whetstone N20

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The Brief

A first-floor terrace in Whetstone N20, framed by a clean glass balustrade and accessed off the rear bi-fold doors, had a timber deck that had rotted out over the years. Several boards had cupped, a few were soft, and the moss in the grooves was permanent. The homeowner wanted a like-for-like replacement that would hold up properly outside and not need re-treating every spring.

What We Did

• Stripped the old timber boards from the full terrace and pulled the last of the rotted fixings.
• Inspected the existing joist sub-frame. Most of it had stayed sound under the failing boards, so we kept the structure in place and only replaced a small number of timber bearers where the moisture had got into the end-grain.
• Re-laid the terrace in light composite boards, set with concealed fixings so the finished surface reads as a single uninterrupted run.
• Trimmed cleanly around the glass-balustrade posts and the threshold at the bi-fold doors so the finished line sat flush with the existing detailing.
• Removed all debris and left the terrace ready to use.

The Result

The terrace has a finished light-composite surface with concealed fixings and neat detailing around the existing glass balustrades. As with any deck, cleaning and care should follow the board manufacturer's instructions. The completed project shows one solution for this particular terrace; the structure and specification need checking separately for each replacement.

Job duration: Roughly one working week on site, including the strip-out and the new lay. Budget: Up to £5,000 for the full terrace, materials and labour included.

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