Loft insulation in Breamore

Reading what is there. Village lofts rarely hold a tidy layer. What we find has settled and compressed, gone patchy across the middle and is missing altogether at the edges, with gaps where cables and pipes were pulled through. Sound, dry material stays and the new layer goes over it. Material that is damp, black underneath or contaminated with droppings comes out, is bagged at the hatch and leaves with us.

What goes down. Mineral wool does most of the work, as a glass wool roll or a firmer rockwool batt, and on hand cut joists at odd centres it gets cut to the bay rather than forced into it. Loose fill suits an irregular ceiling better than a roll. Sheep wool is available. Where the space is too shallow for depth, PIR rigid board goes in cut tight and taped, and a multi-foil quilt covers the last of it.

Depth, in two layers. One layer laid flush between the joists is where most old lofts stop, and it leaves every timber conducting heat straight through the ceiling. The first layer goes between the joists, then a second is cross laid across and over the joists at right angles to break that bridge. Around 270mm in total gets a ceiling to the U value Part L now looks for, and it is the biggest single cut in heat loss most of these houses have left.

Ventilation is not optional here. The quilt ends at the wall plate and the eaves stay open, with vent trays keeping a clear air gap so cross ventilation moves through from eaves to eaves as before. Older roofs often have no underlay at all, or a brittle felt, and a modern breathable membrane behaves differently again, so the detail changes with the roof. Seal the eaves up and the vapour that used to drift out condenses on the underside instead, the dew point moves into the layer, and interstitial condensation turns into black mould on the rafters. Approved Document F is where the ventilation standard sits, and on some roofs a ridge vent is the honest fix.

Everything else up there. Every recessed light gets a rated cover instead of being buried, and cables get clipped over the finished depth, as buried wiring runs hot and has to be de-rated. A the cold water tank, its lid and the pipework are now in cold air, so all of it gets lagging, with the patch beneath the tank left thinner on purpose. The hatch gets insulated on its back and sealed, and a loft ladder that flexes gets mentioned rather than ignored.

No rate per square metre, because the floor area is the easy part and the awkward edges are where the time goes.

Getting to it. A thatched or tiled cottage with a trapdoor in a back bedroom, a farmhouse with a proper staircase into the roof, and a post-war house with a small hatch on the landing are three quite different jobs before a roll is opened, and every one of them starts with work at height. A hatch on a landing you can stand a ladder under is one job. A hatch over a stairwell, a crawl space you can only move through on your knees, or a loft full of boarding that has to come up and go back, is time before any material is laid.

What is up there now, and what it is sitting on. Old material that has to come out, be bagged and taken away is a cost before anything new goes down, and so is a loft full of boxes that has to be emptied and put back. Joists at 400 centres with a flat run across them is a different afternoon from a trussed roof full of bracing.

Ventilation, and the edges nobody reaches. Insulation stops at the wall plate and the eaves have to stay clear, or you trade a warm bedroom for a wet roof. Getting depth right into the corners and around the hatch, boxing over downlighters and lagging anything that now sits in the cold, is most of the labour. Approved Document L sets what the work is expected to reach.

Comparing quotes? Ask what depth is actually being laid and in how many layers, whether the old material is coming out or being covered over, whether the eaves are being kept clear, what happens to anything you store up there, and whether the hatch and the pipework are included. Two quotes for the same job are usually two different jobs.

The village has a conservation area of its own, and there are more than sixty listed entries in and immediately around it. For a loft that cuts one way. Nothing laid on a loft floor is visible from the road, so the depth, the material, the boarding and the sealed hatch are yours to decide and need no application from anybody.

What can show is the ventilation. If a roof cannot breathe at the eaves and the honest fix is a run of vent tiles, an over fascia vent or a ridge vent, that is a change to the outside of the building, and inside a conservation area it is a conversation with the district council rather than a free choice. On a listed building it goes further, because consent there reaches internal work as well, so a lining fixed against a sloping ceiling or anything that alters a historic roof structure needs settling before it starts. Our advice is the same either way. Get the loft floor to depth first, since nobody can object to it, and treat any opening in the roof as its own small application rather than something to do quietly and argue about later.

We cover Breamore, Woodgreen, Fordingbridge, Godshill, Sandleheath and Rockbourne, and the SP6 addresses around them, with New Forest District Council as the authority for planning and building control. You are dealing with Bournemouth Roofing & Building, the trading name of Bournemouth Roofing & Building Ltd, registered in England and Wales, company number 15471719, which you can look up in a minute. Thomas Hannen's business, and he is the one who comes out to price the job, not a salesman. A verified customer's 10 out of 10 on Checkatrade. The visit and the written quote are both free.