Loft Insulation in Canton

Canton's terraces and what sits above them

The bulk of Canton is long rows of two-storey Victorian and Edwardian terraces, many with a bay at the front and a narrower back extension running down the garden. That back section normally has its own small, low roof void, separate from the main loft, and it is often the coldest part of the house because nobody has ever insulated it.

The main lofts are modest in size, with slate roofs laid straight onto battens and no underlay in many cases. That keeps them well ventilated but also lets wind blow across the top of thin insulation and strip its warmth away. Ceilings below are frequently original lath and plaster, so we work from crawl boards and never step between joists. Where we find old, compressed fibreglass we top it up to 270mm with Knauf Earthwool, laid in two layers across and between the joists so there are no gaps for heat to escape through.

Closer to Pontcanna and Llandaff Fields the houses get a little larger and some have converted attics, which change the approach completely.

What Canton homes usually need

Loft Insulation in Canton

Topping up a Canton terrace to 270mm is the single most useful thing most owners can do with the loft, and the back-extension void is usually where the quickest gains are.

Loft Boarding in Canton

Smaller lofts mean storage space is precious, so raised boarding over the full depth of insulation lets you keep the Christmas boxes without flattening the wool.

Rodent Proofing in Canton

Joined roofs along a terrace give mice an easy route from house to house, so we check the eaves and party walls while we are up there.

Working on Canton streets

Parking can be tight on the residential streets off Cowbridge Road East, so we plan deliveries of loft roll for earlier in the day and keep the van loading quick. Most hatches here are small, which is fine for rolled insulation but matters if you want boards or a ladder fitted; we measure on the survey and can widen a hatch where the joists allow.

Party walls in older terraces sometimes stop short of the roof, leaving a gap through to next door. We point this out rather than ignore it, because it affects both heat loss and pest access. Our guide on how much loft insulation you need explains the depths we work to, and if you want to store things up there, read about raised loft boarding first.