Loft insulation in Hyde

Every loft has an easy middle and a difficult edge. Where the rafters come down onto the wall plate the space narrows to nothing, and that is where depth, airflow and fit all have to happen at once.

The insulation has to reach full depth, the air gap above it has to stay open, and neither can be achieved by shoving wool in and hoping. Vent trays clip in between the rafters first to hold the gap, then the material is worked right up under them so there is no cold band running round the outside of every room. It takes longer than the rest of the loft put together and it is the first thing we would check on anybody's quote, ours included.

With the edges of a Hyde loft settled, the depth is straightforward. Between the joists first. Over them second, cross laid so the top layer runs at odds with the timber underneath, which is what stops the joists carrying cold down into the rooms. Roughly 270mm all in, the figure Approved Document L sets for a loft being renovated. Rolls of mineral wool, glass wool or rockwool, do the long runs. Batts drop into small bays, loose fill reaches where a roll cannot follow, and sheep wool is available. What it buys is a lower U value at ceiling level, and since an uninsulated roof can lose around a quarter of a house's heat, the difference turns up on the heating bill before an EPC ever gets round to it.

Ventilation is the other half of the same detail. Cross ventilation enters at the bottom of the slope and finds its way out at the top, and a ridge vent is what gives it somewhere to go. A breathable membrane hands a modern roof a second route out, while an old bitumen felt underlay hands it nothing. Insulating the ceiling carries the dew point up into the roof space, so a loft that managed perfectly well for years can show condensation, wet wool and black mould on the timbers in one winter if the edges get packed.

Old material in a Hyde loft gets a verdict before anything new goes down. Anything compressed under a deck, contaminated where birds have left droppings, settled to half what it was, missing for the last foot before the wall, or patchy where somebody cut round old wiring comes out and leaves in the van. Sealing it under new work only hides interstitial damp where nobody will find it. Access is that hatch and nothing more, so crawl boards go down before anyone leans on a ceiling and the whole job is work at height from the moment the ladder goes up.

The rest is the detail. The cold water tank is lagged, and the pipework with it, because the roof space is colder after the job than before it. Wiring and cables go on top of the insulation. Fire rated covers go over recessed lights and downlighters. Where the loft is in use, legs carry the boarding above the wool, the loft ladder is reset to the new platform height, and the hatch is finished with rigid board and a draught seal. Where there is no loft floor at all, the work goes in at rafter level. Between the rafters, rigid board. Above it, an air path left open. Under them, another layer so the timbers are covered too. Then vapour control, taped, on the room side, with multi-foil kept for a sloping ceiling or a dormer cheek that cannot give up a millimetre.

The floor of the loft is quick to cover. Time goes on the awkward edges and on getting in. The hatch and the space. A small hatch above the stairs, a big open loft with no boards, and a modern trussed roof full of bracing are priced as three separate jobs. A stairwell hatch, or boards to lift and relay, is time spent before anything is laid.

The ceiling underneath. Nobody can kneel on lath and plaster, so crawl boards are laid first and everything is done from them. A plasterboard ceiling is quicker.

What comes out. Old mineral wool that has flattened, loose fill, or anything damp gets bagged and carried down. Boxes stored in the loft are cleared and put back.

Air at the eaves. The quilt stops at the wall plate so that air can still move at the eaves; on an older roof with no breathable membrane, that airflow keeps the timbers dry. Most of the labour is getting depth into corners, round the hatch and over downlighters, and lagging pipes and tanks now left in the cold. Approved Document L sets the target.

Ask other installers how deep they will go and in how many layers, whether old material is taken out, whether the eaves stay clear, and whether hatch and pipework are in the price.

From Boscombe, where we are based, it is 12.7 miles to Hyde. We insulate lofts in the village, Frogham, Ogdens, Godshill and around Fordingbridge. Building control for the village sits with New Forest District Council, and planning with the Park Authority.

Our company is Bournemouth Roofing & Building Ltd, registered in England and Wales, company number 15471719. Thomas Hannen, whose company it is, goes into the loft himself to measure and price. On Checkatrade, a verified customer marked us 10 out of 10. The loft survey is free, and the written quote, listing every item, costs nothing. Before you book a visit in Hyde, you can read our customers' Google reviews, word for word, on our reviews page.

Most repairs in Hyde 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.