Loft insulation in Tarrant Monkton
Full depth over the ceiling where there is a loft to work in, and rigid board against the rafters where there is not, across Tarrant Monkton and DT11.
The site visit is free and so is the written itemised quote. Thomas Hannen prices every job himself.
Plenty of roofs in the valley have no usable loft in them at all. Where a ceiling follows the rafters, or the void over it is too tight to reach into, the work goes against the slope instead of over the ceiling, and that is a different build up with a different price behind it.
Why people ring
One village, two completely different roofs
The cottages ring for one reason and the newer houses for another. In the old part it is a bedroom that never warms and a hatch the size of a tea tray, with nobody quite sure what is above it. Elsewhere it is a layer that went in years ago, has settled away to nothing at the edges, and is costing money every evening the heating runs.
Neither of those is a telephone price. We open the hatch, find out whether there is a floor to work on at all, put a rule through whatever is up there, feel along the wall plate for the air path and photograph the lot. The survey costs nothing and neither does the written quote, which separates the material, the depth or the build up, and anything that has to be carted away.
The work
Where there is a void, and where there is not
Where there is a floor to work on. The old layer is pulled back apart, straightened, and left in place if it is dry. A second run of mineral wool then goes over the top of it at right angles to the joists, and that crossing run is what buries the timber and stops a ceiling handing its heat back in strips. Roughly 270mm together is the depth a renovated ceiling needs to make the u value asked of it, which Approved Document L sets out. Glass wool on the roll where the bays run even, rockwool batts where hand cut joists wander in and out of line, and loose fill poured into the corners a roll will not sit down into.
Where there is not. Follow the ceiling of an old cottage and it often runs straight up the rafters, or the space over it is too tight to get a shoulder into. Roll is no use in either. Rigid PIR board, Celotex or similar, gets cut to each bay and pushed up between the rafters with a clear air gap held above it, a second layer is fixed under the rafters to break the bridge through the timber, and the whole lot is closed with a taped vapour control layer so the dew point never lands anywhere it can wet the structure. That is a warm roof. Dormer cheeks and the flat top of a room in roof are handled the same way, and multi-foil quilt earns its keep where depth has simply run out.
The air comes first either way. The layer is stopped on the wall plate and never pushed past it, and a vent tray between each pair of rafters holds the gap above it open so ventilation still crosses the roof from soffit to soffit. A good many roofs here carry no underlay at all and breathe by themselves. Where one has been recovered under a breathable membrane over boxed soffits, that path can already be shut, and you read it as condensation on the felt with black mould creeping over the rafter feet. A ridge vent goes in before any depth does, and BS 5250 is the code behind managing moisture in a building.
The ceiling below, and getting about on it. Old lath and plaster will not carry a knee, so nothing is stood on and we work off boards spanning the joists, outwards from the hatch. Where the void is too shallow to sit up in it becomes a crawl, and that is time spent before a packet is opened. Anything you have stored comes down first. Access is agreed on the survey, because a loft is still work at height even with a roof over your head.
The bits that get forgotten. Downlighters take a rated hood each. Cables are dressed over the new depth rather than left buried in it, because cable in insulation runs warm. The cold water tank and its pipework have just been moved to the cold side of the house, so lagging and a jacket go on and nothing is laid underneath the tank. The hatch is insulated on its back and sealed, the loft ladder checked against the new floor, and if you want storage the boarding goes back on loft legs above the wool rather than flat on the joists.
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 not development and needs no application, which Planning Portal guidance on insulation sets out, so permitted development is not the question. Building control appears only where the roof itself is renovated, and regulation 23 then brings the whole element up to current standard. The village has its own conservation area and a good number of listed entries, so anything that changes the outside of a roof goes to Dorset Council first.
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 cottage with no usable void at all, an older house with a hatch over the stairs, and a modern detached on the edge of the village are three different jobs. 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. Tarrant Monkton is a fair run for us, so say when you ring if the loft is genuinely wet and somebody comes out ahead of the survey list. The phone is answered 24 hours for emergencies; scheduled work runs Monday to Friday, 8am to 6pm.
Worth knowing
Inside the conservation area, it is the outside that is controlled
The village sits inside the Tarrant Valley conservation area, with a good many listed entries in and around it. For a loft the line is a simple one. What you do inside the roof is your business and what changes the outside of it is not. Insulation, a sealed hatch, boards on legs, rigid board against the rafters: none of it is visible and none of it needs an application.
The awkward part is that the buildings with least room in the roof are often the ones with most control over them. If the answer to a cold room is a rooflight to reach the space, vent tiles across the slope or a dormer, that is a conservation area question, and on a listed building a consent question too, because listed building consent reaches work affecting the character of the building whether or not anybody outside can see it. So we plan from the inside out. Depth where there is a void, rafter level where there is not, ventilation at the eaves before anything goes through a slope, and a straight answer on what Dorset Council would want to see before you order anything.
Who you are dealing with
A local firm you can check
We cover Tarrant Monkton, Tarrant Hinton, Tarrant Keyneston, Pimperne, Blandford Forum and the DT11 addresses around them, with Dorset Council 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.
Questions
Tarrant Monkton questions we get asked
There is no hatch. Can you still insulate the roof?
Usually, but the honest answer depends on what is behind the ceiling. Sometimes a hatch can be formed neatly in a cupboard or on a landing and the space turns out to be perfectly workable. Sometimes the ceiling follows the rafters and there is no void at all, in which case the work goes against the roof from inside the room. We settle which of those you have on the survey, before anything is priced.
Is rafter level work worth it compared with a loft floor?
It costs more and it takes longer, because every piece is a fitted cut rather than a rolled length. What it does is insulate a room you actually live in rather than a space you store boxes in. Where there is a usable void, the floor is far better value. Where there is not, rafter level is the only thing that will work.
Will insulating the sloping ceilings make them damp?
Not if the build up is right, and that is where the care goes. A continuous taped vapour control layer on the warm side keeps moist room air out of the construction, and a clear ventilated gap between the board and the underlay lets the roof dry. Get either wrong and the dew point lands inside the timber, which is the expensive version of this mistake.
How long does it take, and does it show on the bill?
A loft floor is half a day to a day. Rafter level work is longer and is planned room by room. Heat loss through the roof is the biggest single loss in a house either way, so it shows on the heating bill and on an EPC, and VAT on energy saving materials follows HMRC VAT Notice 708/6.
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Get a price for your Tarrant Monkton loft
Tell us the address and whether you can get into the roof at all. We will come and find out properly, then put an itemised price in writing. No charge, no obligation.