Loft insulation in Holton Heath

Clearing, topping up and laying to full depth in Holton Heath roof spaces, with the ventilation put right before anything goes down.

The site visit is free and so is the written itemised quote. Thomas Hannen prices every job himself.

Loft insulation

Answer first

Mineral wool insulation laid between and over the ceiling joists in a loft
Two layers, crossedThe second layer runs across the joists so the timber stops being a cold bridge.

Insulating a loft and converting one are two entirely different jobs. Insulating is a day, no application, nothing to ask anyone. Converting is a building project with planning in it. Most people who ring us here want the first and have been quoted for the second.

The three situations we see most are simple enough. A bedroom over the garage or at the end of the house that will not hold heat. A loft where the original layer has been squashed flat by boarding and thirty years of storage. And a roof space that has started sweating, with damp patches on the insulation and mould creeping along the rafters.

We come out and look before we put a figure on anything. What is up there, how deep it truly is, where the joists run, whether the eaves are still open and what has been stored on top. The site visit is free, the quote is written and itemised, and if the ceiling is already sound we will point you at whatever is actually costing you the money.

The work

The loft work we do around Holton Heath

Rigid insulation board fitted between the rafters in a loft
Board where depth is shortRigid board earns its place where the headroom will not take quilt.

Clearing and checking. What is up there is rarely as deep as anyone thinks. It settles, it gets compressed under boards, it goes missing in patches where cables or an aerial were run, and it almost always stops short of the wall. Contaminated material, anything with droppings in it and anything that has been wet gets bagged and taken away. Sound material stays and is covered rather than binned.

Two layers to about 270mm. The first layer of mineral wool roll goes between the joists, tight to the sides so there is no gap at the edge. The second is laid across the joists at right angles so the timber itself is buried, because a joist left proud conducts heat straight through the ceiling and undoes a surprising share of the work. Glass wool roll for the open runs, rockwool batts where the bays are narrow or irregular, loose fill in the corners a roll cannot sit flat in. Approved Document L sets the U value the finished ceiling should reach.

Ventilation before depth. A properly insulated ceiling makes the roof above it cold, which moves the dew point up into the structure, so any vapour getting out of the house will condense on the underside of the felt. The eaves stay clear, insulation stops on the wall plate, vent trays keep an unbroken air gap, and cross ventilation carries the moisture out. Where the eaves are boxed in and cannot be opened, ridge vents or vent tiles do the job. Approved Document F covers it, and we would rather lay less and ventilate properly than lay more and rot the rafter feet.

Lights, cables, tank and hatch. Recessed lights get covers so they can breathe. Cables are lifted clear and clipped, not buried under wool. The cold water tank and its pipework are now sitting in cold air, so lagging and a tank jacket go on at the same visit. The hatch is insulated on its back and given a draught seal, and if the loft ladder now fouls the new depth we reset it.

Storage, and where the roof slopes. If you use the loft, boarding goes on loft legs to make a raised floor that clears the full depth rather than crushing it, and we board the part you use rather than the whole roof. Where a house already has a room in roof, a dormer or a sloping ceiling, the insulation belongs at rafter level: rigid PIR board between the rafters with a clear gap under the underlay, a layer beneath, taped joints, and a warm roof build up that keeps interstitial condensation out of the timbers.

How it runs

From your call to a written price

A loft insulated at rafter level with the gable filled and a rooflight fitted
At rafter levelA room in the roof is a different job from a cold loft floor.

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.

Laying insulation in a roof space is not development, so permitted development does not come into it and there is no application, as Planning Portal guidance on insulation sets out. Building control applies where regulation 23 does, which is when more than half of an element is renovated and the whole of it has to come up to current standard. There is no conservation area here and only a handful of listed entries nearby, so for an ordinary house at Holton Heath there is nothing to ask anyone for. If yours is one of them, listed building consent is where to start, and how VAT works on energy saving materials is worth knowing before you order.

Cost

What decides the price of a loft

Plasterboard taped and jointed on a lined loft wall
Lined, then tapedWhere the loft becomes a room, the boarding and the joints come next.

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 1980s detached with a hatch on a wide landing is one job, a bungalow with a long shallow roof and a crawl at the eaves is another, and a chalet where half the roof is already a bedroom is a third. 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. Holton Heath is twenty minutes from us, so a loft that has gone wet gets looked at quickly. The phone is answered 24 hours for emergencies; scheduled work runs Monday to Friday, 8am to 6pm.

Call now: 07435 839745

Worth knowing

Insulating the loft is not converting it

This is worth getting straight before you ring anybody, because it decides how big your project is. Holton Heath drains into Poole Harbour, and in that catchment any scheme that adds overnight accommodation has to deal with nutrient neutrality before it gets consent. That is a real hurdle and it costs time and money. What triggers it is a new bedroom, not a warmer one.

So a loft conversion here, turning the roof space into a room somebody sleeps in, is a planning project with that question attached to it, plus building control, stairs, fire escape and structure. Insulating the same loft is none of those things. Nobody needs to be asked, nothing is added to the house, and the work is finished the day it starts. If what you want is a warmer upstairs and a smaller heating bill, say so when you ring: half the people who ask us about doing the loft are describing insulation and have been quoted for a conversion by somebody who heard the word loft and stopped listening.

Who you are dealing with

A local firm you can check

We cover Holton Heath, Sandford, Organford, Lytchett Minster and the BH16 addresses around Wareham St Martin, 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

Holton Heath questions we get asked

How long does the job take?

Half a day to a day for most houses here. What stretches it is what has to come out first: bagging old material, emptying a loft used for storage, and lifting boarding that has to be put back. That is on the quote as its own line so you can see what you are paying for.

Is it worth doing if there is already something up there?

Almost always. Most of what we find is a single old layer sitting flush with the top of the joists, which is roughly a third of what a ceiling should have and leaves every joist working as a cold bridge. Cross laying new roll over the top of sound old material is the cheapest heat you will ever buy back.

We want to convert the loft eventually. Should we wait?

No, and the two rarely clash. Insulation laid over the ceiling now is easy to lift and reuse if the space is converted later, and in the meantime you are not paying to heat the roof. If a conversion is genuinely close, tell us and we will keep the boarding and the hatch work light rather than build something you are about to take out.

Can you sort the condensation as well as the insulation?

That is normally the same visit. Droplets on the felt and black mould on the rafters are a ventilation problem, not an insulation problem, so we clear the eaves, fit vent trays, look at whether the hatch and the light fittings are leaking warm air upwards, and then lay the depth. Doing it the other way round makes the damp worse.

Free quote

Warmer loft, or a conversion? Let us look first.

We will measure what is up there, check the eaves and the hatch, and give you an itemised written price. The site visit is free.