Floor insulation in Teesside
Suspended timber floor insulation in Teesside costs £800 to £2,000 for a typical terrace or semi in 2026: mineral wool netted between the joists from below where access allows, or boards lifted from above where it doesn't. Cold, draughty ground floors are the signature of Teesside's Victorian and 1930s housing, and this is the fix.
Cold floors are a Teesside tradition, not a requirement
Victorian terraces and 1930s semis across the patch sit on suspended timber floors: floorboards over joists over a ventilated void. That void keeps the timbers dry and the rooms freezing, icy boards in January, draughts at ankle height, and heat bills paying to warm the crawl space. Insulating between the joists with mineral wool on netting stops it, and lifts floor surface temperature by several degrees.
From below or from above
Where the void is deep enough to crawl (or access hatches exist), the wool goes in from below without touching your floors, the cheapest and cleanest route. Where it isn't, boards come up in sections, the wool is netted between joists, and boards go back down. Both routes take one to two days on a typical house. The sub-floor vents stay open throughout: insulating the floor while blocking the vents trades warm rooms for rotten joists.
What it costs
£800 to £2,000 depending on floor area, access and whether boards need lifting. Draught-proofing the skirting gaps and pipe penetrations while the work happens is usually included or a small add-on, and it's worth it: draughts account for as much discomfort as the cold boards themselves.
Pairs with the rest
Floor insulation is often bundled with loft and cavity wall work in one visit, and the bundle prices better than three separate jobs. The survey prices the whole envelope, you pick what to do first.