Loft insulation in Brockenhurst
Two layers over a big ceiling, the eaves kept open, and an itemised written price before anything is ordered.
The site visit is free and so is the written itemised quote. Thomas Hannen prices every job himself.
Loft insulation here is two layers of mineral wool, one between the joists and one cross laid over them to a finished 270mm, with the eaves held open so the roof can still breathe and the hatch sealed against warm air.
Most people ring for one of three reasons. A room that never feels warm, whatever the heating is doing. A thin old layer up there that has clearly stopped earning its keep. Or something damp: black spots on a ceiling, or wet timbers spotted when the Christmas boxes came down. A lot of Brockenhurst houses are older and generously sized, with big roof spaces over them, and a big roof space loses a great deal of heat if the ceiling under it is thin. We look before we say anything, and both the site visit and the written itemised quote are free.
The work
What a Brockenhurst roof space asks for
What we find when the hatch comes off. Usually one settled layer between the joists, thinner than it started, patchy near the edges, gaps where a cable was run and nothing at all in the corners. Older roofs here often have no underlay at all under the tiles, so wind has been lifting and moving the wool for years. Anything wet or contaminated with droppings is bagged and taken away rather than covered over.
Material, and the depth that matters. Mineral wool in a roll does most lofts, glass wool or rockwool, the first layer friction fitted between the joists and the second laid across them to 270mm finished. That second cross laid layer is the one that counts, because it takes the joists themselves out of the heat path. Batts help where joists sit at odd centres, loose fill goes where nobody can crawl, and rigid board such as PIR or Celotex is for tight headroom.
Ventilation, and an unfelted roof. Insulation stops at the wall plate. Vent trays hold the air gap open at the eaves so cross ventilation still works. On an older roof with no underlay the loft ventilates itself through the tiles, which is a help, but loose wool blows about up there, so the edges have to be held down properly. On a re-covered roof with breathable membrane the eaves detail matters more, and a ridge vent covers the case where they cannot be opened.
The hatch, the tank and the storage. The hatch is the biggest hole in the ceiling: insulated on the back, draught sealed round the frame. Any cold water tank and its pipework get lagging once the loft is cold. Cables are lifted and clipped over rather than buried, and recessed lights get fire rated covers. Where you store things we build a raised floor on loft legs and board that, so full depth survives underneath and the loft ladder still works.
Sloping ceilings and rooms in the roof. Where a dormer or a room in the roof already exists, the work follows the rafters: rigid board cut between them with a clear gap left to the underlay, another layer under, joints taped so vapour is not driven into the timber. Done as a warm roof while the covering is off, it costs less and performs better.
How it runs
From your call to a written price
Same team from first visit to last, one person to ring, and no sub-contracting your work out to somebody you have never met. The quote is itemised, not a figure on the back of a card: the survey, clearing and bagging whatever is up there now, the material and its depth, keeping the eaves clear, the hatch and any pipework, and disposal on separate lines, so you can compare it properly against anyone else's.
Nothing is left open or unusable overnight. The site is swept at the end of each day rather than the end of the job, and what comes out leaves with us. If something turns up once we start that nobody could have seen, you get a photograph and a price before we carry on.
Insulating a loft is inside the building, so it is not development and there is nothing to apply for, which Planning Portal guidance on insulation confirms. What the work has to reach comes from Approved Document L. The planning authority in Brockenhurst is the New Forest National Park Authority rather than the district council, and its National Park heritage and conservation guidance is the place to start on a listed building. HMRC VAT Notice 708/6 covers VAT on insulation.
Cost
What decides the price of a loft
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 big older house with a walk about roof space, a modern detached with a trussed roof, and a cottage with a trap over a cupboard are three different mornings. 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.
If the loft is wet
Water running off the felt, or mould on the underside
Ring rather than use the form. Droplets on the underside of the felt, black mould spreading across the roof timbers, or insulation that is visibly damp are all telling you the same thing: warm wet air is getting into a space that cannot breathe. That does not wait, because it is the timbers that pay for it. We look before anything is added, because putting more insulation into a loft that cannot ventilate makes it worse. Damp gets into a roof space here from below rather than above, so a bathroom fan discharging into the loft instead of out through the roof is the first thing we look for. The phone is answered 24 hours for emergencies; scheduled work runs Monday to Friday, 8am to 6pm.
Worth knowing
The National Park sets the rules outside, not above your ceiling
Brockenhurst is inside the New Forest National Park, and that means something practical: the planning authority for your house is the National Park Authority, not the district council. The village also has its own conservation area. Between them they control what the place looks like, which catches anything that changes a roof from the outside, a new dormer, a rooflight on a visible slope, a change of covering.
None of that reaches your loft. Insulation laid over a ceiling is invisible from the road and outside the whole system, so it is the one warmth job here that needs no permission and no conversation with anybody. It is also the one that gives most back, because these are big roofs over big ceilings. If you are thinking further ahead, to a room in the roof or a rooflight, that is when the Authority becomes part of the plan, and it is worth knowing which side of the line you are on before you spend anything.
Who you are dealing with
A local firm you can check
We cover Brockenhurst, Boldre, Lyndhurst, Lymington and the villages between them in the SO42 postcodes, with the New Forest National Park Authority for planning. 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.
Questions
Brockenhurst questions we get asked
How long does the work take?
A day for most houses. Clearing and bagging the old material takes the morning and the two new layers go down in the afternoon. A large roof space, or one that has to be emptied of storage first, runs into a second day.
Our roof has no felt under the tiles. Does that change anything?
It helps and it hinders. The loft ventilates itself through the tiles, so condensation is less likely, but wind gets in and moves loose material about. We hold the edges down and keep the depth where it is meant to be rather than letting it drift.
Do we need permission from the National Park?
Not for insulation. Laying material over a ceiling or between rafters is inside the building and is not development, so there is no application. A dormer, a rooflight on a visible slope or a change of covering is a different question and the Authority handles those.
Will it make the condensation worse?
Not on its own. The water is already in the air inside the house. Insulation changes where it lands, by dropping the temperature of the timbers above you, so the answer is air crossing the loft and a sealed hatch rather than less depth.
Is it worth doing if we already have some?
Usually. Old material settles, and a thin settled layer leaves the U value of that ceiling well short of what Part L expects. We normally straighten and keep what is between the joists and cross lay new over the top, which costs less than starting again.
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Get the loft looked at properly
Thomas comes out, gets into the roof space and puts what it needs in writing. The visit and the quote are free.