Checking chipboard before we commit to a finish
We look closely at joints, edges near external walls or bathrooms, and anywhere there's been a past leak. Chipboard doesn't recover well once it's been wet — it swells and loses structural strength permanently, unlike timber which can sometimes dry out and settle. Any soft or crumbling areas need cutting out and replacing rather than covered over.
What goes wrong if damaged chipboard is covered up
- Soft spots continue to deteriorate under the new floor, eventually causing sagging or a soft feel underfoot.
- Fixings that have already popped work their way back through thinner overlays or vinyl.
- Moisture trapped in swollen chipboard can encourage mould growth unseen beneath the new covering.
Finishes that suit chipboard, and where it falls short
Sound, flat chipboard takes carpet, laminate and floated engineered wood well. For LVT and vinyl we'd generally recommend an overlay of plywood or hardboard first, since chipboard's surface isn't always smooth or stable enough for adhesive-based finishes to bond reliably long-term.
Fife reality: extensions and loft conversions
A lot of the extensions and loft conversions we see across Kirkcaldy and Glenrothes from this era used chipboard decking, often with tighter joist spacing than modern regulations require, or without it in older sections. It's worth checking both the board condition and what's supporting it before assuming a straightforward job.
Repair and prep sequence
- Identify and cut out any swollen or delaminated panels back to sound joists.
- Re-fix loose panels and countersink or replace popped fixings.
- Overlay with plywood or hardboard where the finish requires a smoother or more stable surface.