Loft Insulation in Blackwood

Valley terraces, post-war estates and newer housing

Blackwood began in the early 1800s as a colliery settlement and grew with coal mining through the Victorian era. The oldest housing is the long rows of stone and brick terraces stepped along the valley sides, many with slate roofs, small lofts and a chimney breast taking up part of the roof space. In these houses the loft is often shallow at the front and back eaves, which makes reaching the edges awkward and is exactly where thin old insulation tends to stop short.

Through the twentieth century the town spread out with council and private estates of semis and short terraces, and later with bungalows and cul-de-sac housing on the flatter ground around the town. These have trussed or simple pitched roofs that are easy to work in, but the insulation laid when they were built is usually well below today's recommended 270mm, and much of it has been disturbed by years of storage, aerials and new wiring.

In both cases, the job usually comes down to clearing or levelling what is there, filling the gaps at the eaves and around the hatch, and laying a fresh layer of mineral wool across the joists to bring the whole floor up to depth.

What Blackwood homes usually need

Loft Insulation in Blackwood

Most Blackwood terraces and estate semis have a thin, patchy layer from decades ago, and a proper top-up to 270mm of Knauf Earthwool is the simplest way to stop heat escaping through the top floor ceiling.

Loft Mould Treatment in Blackwood

Wet weather funnelled up the Sirhowy Valley finds its way into older roofs, so we look for mould on rafters and sarking, treat it, and deal with the ventilation problem behind it.

Loft Boarding in Blackwood

Estate semis and bungalows often have usable roof space, and raised boarding lets families store things up there without flattening the new insulation.

Practical notes for Blackwood homes

Many terraced streets on the valley sides are steep and narrow, with on-street parking only. When we book in, we ask where the van can stop so materials can be carried in without blocking the road for long. Older terraces sometimes share a roof void with next door through gaps in the party wall, which we check because it can affect draughts and how vermin move between houses.

Where a roof has no felt or the felt has perished, rain and cold air can reach the insulation, so we keep an eye on the condition of the slates from inside. If you're curious about funding for Welsh homes, our guide to loft insulation grants in Wales sets out where to look. For more on the damp side of things, read about loft condensation and mould.