Loft insulation in Tolpuddle

What comes out, and what stays. Most lofts in Tolpuddle hold something already, often laid a long time ago. It has settled, gone patchy, been pulled back around cables and stops short of the wall plate with bare timber showing. Dry and sound, it is straightened, the gaps closed and kept as the first layer. Wet from an old leak, crushed under boards or contaminated with droppings, it is bagged and taken away with us.

The two layers. In a Tolpuddle loft, mineral wool in a roll, glass wool or rockwool, is friction fitted between the joists first. The second layer is laid across them at right angles to a finished depth of 270mm, and that is the one that matters, because it covers the joists and stops the timber itself carrying heat out of the ceiling. Batts suit uneven joist centres, common in an older cut roof, and loose fill suits a roof space nobody can crawl through.

Where the depth will not fit. Rigid board, PIR such as Celotex, gets more out of less thickness, so it goes in a low eaves run, a boxed landing or against a sloping ceiling. Sheep wool and multi-foil have narrow uses too. Where there is a room in the roof or a dormer the work follows the rafters, with board cut between them, a clear air gap kept above to the underlay, a second layer under and the joints taped.

Air has to keep moving. Insulation in a Tolpuddle loft stops at the wall plate and is never pushed over it. Vent trays hold the gap open so cross ventilation carries on under the felt, and where a roof is on breathable membrane rather than old bitumen the detail changes a little. A ridge vent goes in where the eaves cannot be opened. Cover the eaves and you have swapped a warm bedroom for condensation, black mould and wet timbers.

The hatch, the tank and the boards. The hatch is insulated on the back and draught sealed round the frame, which closes the biggest vapour path out of the house. Any cold water tank up there, and the pipework running to it, is now in an unheated space and wants lagging. A cable gets lifted and clipped over the new material instead of disappearing under it, since wiring that cannot shed heat carries less current, and every recessed light needs a fire rated cover. Boarding, where you want it, sits on loft legs high enough to clear the second layer, and the loft ladder and a working platform stay where they are.

A loft's floor area tells you little about how long the job takes. The edges, the access and whatever is already up there decide it.

The hatch and the space. Some older cottage lofts are reached through a small trap in a bedroom ceiling and are too low to kneel upright in. Others have boarding laid across the joists that has to be lifted and relaid. Both add hours before a roll is opened.

The old layer. If the existing mineral wool is thin, flattened or damp, it is bagged and taken away rather than buried. Boxes and old furniture have to be moved and put back. A trussed roof with diagonal bracing is slower to lay across than open joists.

Keeping air moving at the eaves. The new layer stops short of the eaves so air can still pass over the wall plate, otherwise the roof timbers get wet. Lagging the pipes and tank, building a raised box over each downlighter and packing the corners take most of the time. Approved Document L sets the target.

A roof with no felt. Some older roofs have nothing under the tiles, and the ventilation needs looking at before any depth goes down.

Ask any other installer what depth and how many layers, whether the old material is removed, how the eaves are kept open, and whether the hatch and pipework are included.

We cover Tolpuddle, Milborne St Andrew, Bere Regis, Crossways and the DT2 addresses along the valley, which sit about twenty miles from our base in Boscombe. Building control for your loft is Dorset Council.

Our registered name is Bournemouth Roofing & Building Ltd, in England and Wales, company number 15471719. Thomas Hannen owns the business and climbs up through your hatch before pricing it himself. On Checkatrade, one verified customer rated the job 10 out of 10. The survey visit is free, as is the quote, set out item by item. Before you book a visit in Tolpuddle, you can read our customers' Google reviews, word for word, on our reviews page.

Most repairs in Tolpuddle need no application at all. What decides whether a change to the outside of your house does is who the council is, whether a conservation area or a listing applies, and whether the place sits in a protected landscape.