Loft insulation in Ashley

What is up there already decides the first hour. Ashley lofts usually have something in them. It has settled, it is compressed flat wherever anyone knelt on it, and it is patchy or missing in the corners nobody could reach. Dry and in one piece, it stays and we lay over it. Damp, black underneath or contaminated with droppings, it comes out bagged and leaves with us, on its own line.

The material. Most of this is mineral wool, either a soft glass wool roll or a denser rockwool batt. Loose fill, blown or poured, suits a loft where the joists are irregular, and sheep wool is there if you want it. Where headroom is the constraint it becomes PIR, the foil faced rigid board, cut tight and taped, and in a really shallow space a multi-foil quilt earns its keep. Where there is no loft floor to work on, a room in roof is a different job: it goes at rafter level as a warm roof, with board between and under the rafters and the sloping ceiling and dormer cheeks carried through as one layer.

Depth, and why the second layer runs the other way. A ceiling joist is rarely deep enough to hold more than a third of what the ceiling wants, so one layer laid flush between the joists and called finished is the commonest fault we find. The first layer goes between the joists. The second is cross laid over the joists at ninety degrees to the first, so the timber stops working as a cold bridge through the ceiling. Two layers, roughly 270mm all in, which is what a Part L U value works out to in mineral wool.

Where it has to stop. The layer stops at the wall plate. The eaves stay open, and vent trays keep a clear air gap under the covering above the quilt so cross ventilation still crosses the roof from eaves to eaves. Block the eaves and you have bought a wet roof: the vapour that used to drift away sits under cold felt instead, and by February there are droplets on the underlay and black mould on the rafters. Insulating moves the dew point, and interstitial condensation inside the layer is the failure nobody sees. A roof with a breathable membrane, or none at all, is detailed differently, and on some a ridge vent is the honest answer.

The things already living up there. Recessed lights want proper covers, not a heap of wool over the top, and cables are lifted and clipped over the top instead of being buried, since buried wiring runs hot. Once the ceiling is at full depth the cold water tank sits in cold air, so it gets a jacket, the pipework gets lagging, and the patch under the tank is left thinner on purpose.

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. Access is most of the difference. A 1960s bungalow with a hatch on the landing, a chalet with rooms already in the roof, and a semi where the only way up is a loft ladder over a half landing make three different mornings. Getting through the opening is work at height before a single roll is opened. 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.

Something over four in ten homes in Ashley are bungalows, and that changes two things about a loft. The arithmetic first: the ceiling you are insulating sits over every room in the house rather than over the upstairs only, so the same day's work cuts more heat loss here than it does in a two storey house on the same footprint, and the heating bill notices it sooner. It is also the one thermal improvement an EPC assessor measures with a tape rather than assumes.

The other thing is that in a bungalow the loft is usually the only storage there is, and nobody wants to give that up. You do not have to. Loft legs stand a raised floor clear above the insulation, so the quilt is never squashed flat under a chipboard platform, which is what makes most boarded storage useless. We board the part you actually use and leave the rest at full depth. The hatch gets insulated on its back and sealed against draughts, and if the loft ladder is a wobbly one we will say so.

We cover Ashley, New Milton, Bashley, Hordle, Tiptoe and Barton on Sea, and the BH25 addresses around them, with New Forest District Council handling 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.