Loft insulation in Corfe Mullen
Full depth back over the ceiling, your storage kept, 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.
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Nearly every Corfe Mullen loft already has something in it, so the job is a top-up: straighten what is there, close the edges and cross lay fresh mineral wool over the joists to a finished 270mm. Air still gets in at the eaves, storage boards go back on legs above the new layer, and the tank and pipes are wrapped. Walls and floors are a separate page, insulation in Corfe Mullen.
In Corfe Mullen it usually comes to a head in a cold bedroom, a trip into the loft or a lifted board. The bedrooms are cold and the heating bill says so. They have been up in the loft for something and noticed the insulation is thin, flat and stops well short of the walls. Or a board has come up and the wool underneath is squashed to nothing. Most of the housing here went up between the war and the early eighties, so the roofs are much of an age and much of a type, and roofs of one age and type tend to share the same faults. We look at yours before we price it. The site visit is free and so is the written itemised quote.
The work
Straightening a loft that was done once already
Getting the old material honest again. A layer laid decades ago has settled, dipped between the joists and pulled apart at the joins, and there are usually bare runs where a cable or an aerial lead was pulled through.
If the old layer in a Corfe Mullen loft is dry we straighten it, close the gaps and keep it. If it is wet, crushed flat or contaminated with droppings, it is bagged and taken away first. Nothing new goes on top of something that should have come out.
Two layers, and why the second one matters. The first layer sits between the joists, friction fitted rather than rammed in. The second is laid across the joists at right angles to bring the finished depth to 270mm, and that is the layer that stops the timber itself acting as a cold bridge straight through the ceiling. Mineral wool, glass wool or rockwool in a roll suits most lofts; batts help at odd centres and loose fill goes where you cannot crawl.
Where headroom or shape gets in the way. A shallow trussed roof, a boxed in landing or a low eaves run will not take a roll. Rigid board, PIR such as Celotex, cut tight, does more in less depth. Where a sloping ceiling, a dormer or a room in the roof is involved the work follows the rafters instead, with a clear gap kept above the board to the underlay and joints taped so vapour is not pushed into the timber.
The eaves have to stay open. Insulation in a Corfe Mullen loft stops at the wall plate. Push it into the eaves and the air stops crossing the loft, and a warm bedroom is bought with a wet roof. We hold the gap with vent trays, check that cross ventilation actually works, and where a roof has been re-covered on breathable membrane rather than old felt we say what that changes. A ridge vent is the answer where the eaves cannot be opened up.
The services up there. Once a Corfe Mullen ceiling is insulated the loft is a cold space, so a cold water tank and its pipework need lagging, the tank on the sides and top and never underneath. Cables get lifted and clipped over rather than buried, since wiring that cannot lose heat carries less current. Recessed lights and downlighters need fire rated covers, and the hatch gets insulated on the back and draught sealed round the frame.
How it runs
Bringing a bungalow or semi loft up to full depth
Thomas goes up through the hatch and prices the loft himself. Roofs of this age are mostly trussed rafters, with a thin original layer of insulation between the ceiling joists and felt under concrete tiles.
For a Corfe Mullen loft you get a line each for the survey, clearing out and bagging the old layer, the new mineral wool and how deep it goes, eaves trays to keep the airflow open, the hatch, lagging the pipework, and taking the waste away. One quote covers the survey and the laying.
Boxes are brought down and put back, dust sheets go on the landing, and old insulation goes out bagged. If we find a bathroom fan venting into the loft, a water tank with no lagging or wiring buried in the insulation, we photograph it and price the fix, and nothing extra is done without your agreement.
Insulation inside a loft is not development and needs no planning application, which Planning Portal guidance on insulation sets out plainly. That is true even for a house in the conservation area that covers Brogg Street and Sleight Lane, since nothing changes outside. The standard is set by Approved Document L, with Dorset Council for building control.
Cost
Trusses, boarding and the eaves: what a loft top-up costs
We do not price a Corfe Mullen loft by the square metre. The floor area is easy; the edges and the clutter take the time. Getting in. A bungalow with a wide landing hatch, a chalet where half the roof is already a room, and a semi with a boarded loft need three different ways of getting up there. A hatch above the stairs, or a space so low you work kneeling, adds time before a roll is laid.
Boarding. If you want to keep storage, the boards have to be raised on stilts above the new depth, or the insulation gets squashed and stops working. That is a line of its own.
Trusses. A trussed roof has diagonal bracing across the joists, and rolls have to be cut and fed around it. It is slower than an open roof.
Eaves and cold spots. The rolls finish at the wall plate, and trays keep the eaves open so ventilation carries on and the roof can breathe. Tanks and pipes left in the cold get lagged, and downlighters get covers.
Ask whoever else quotes what depth goes down and in how many layers, whether storage boards are being raised, whether the eaves are kept open, and whether the hatch and pipework are covered.
If the loft is wet
Wet insulation, or water running off the felt
Ring instead of using the form. If you see beads of water on the felt, mould on the rafters or insulation that feels damp, moisture from the house is reaching the loft faster than it can escape, and the timbers suffer.
On the first visit we find the source before adding anything. If a bathroom or kitchen fan here vents into the roof space rather than outside, that is often the whole problem and quick to put right. Loft work is scheduled Monday to Friday, 8am to 6pm. When the phone is not answered, we call back at the earliest chance.
Worth knowing
The boards over your ceiling are probably crushing the insulation
On a Corfe Mullen loft top-up, boarding is the part that most changes the price. These are family houses on estates with garages and lofts, and over the years many lofts like these have had chipboard sheets laid straight across the ceiling joists to make a store.
That looks tidy and it quietly ruins the insulation, because a joist is only so deep and the boards squash whatever is under them down to a fraction of its depth. A crushed layer is not insulation, it is a filled gap.
The fix is not to give up your storage. It is to lift the boards, get the full depth back in and then rebuild the floor on loft legs so the boards sit above the second layer, not on it. A boarded area that is planned rather than grown can be much smaller than you expect. We measure it at the visit, price the raised floor as its own line, and you decide whether you want it before anything is ordered.
Who you are dealing with
Who lays your loft insulation, and how to check
We insulate lofts in Corfe Mullen, Broadstone, Beacon Hill, Wimborne Minster, Upton and Merley, in the BH21 postcodes, a short run of about eight and a half miles from Boscombe.
Dorset Council covers planning and building control, and the owner, Thomas Hannen, goes up into the loft to price it himself, so you will meet him at the hatch. Bournemouth Roofing & Building Ltd is registered in England and Wales, company number 15471719. A verified customer's 10 out of 10 is on Checkatrade for you to read. The visit and the written, itemised quote are both free. Before you book a visit in Corfe Mullen, you can read our customers' Google reviews, word for word, on our reviews page.
Planning at a glance
Do you need planning permission in Corfe Mullen?
Most repairs in Corfe Mullen need no application at all. What decides whether a change to the outside of your house does is who the council is, whether a conservation area or a listing applies, and whether the place sits in a protected landscape.
| Question | In Corfe Mullen |
|---|---|
| Who decides | Dorset Council is the planning authority for Corfe Mullen. Dorset Council's heritage pages set out what it controls. |
| Conservation area | Yes: Brogg Street / Sleight Lane Conservation Area. Check whether your street is inside the boundary before changing anything visible. |
| Listed buildings | Yes, there are listed buildings in and around Corfe Mullen. If yours is one, work can need listed building consent. |
| Protected landscape | No National Park or National Landscape covers Corfe Mullen. |
Questions
Questions about loft insulation in Corfe Mullen
How long does it take?
A day covers most houses in Corfe Mullen. Where a boarded loft has to be emptied, the boards lifted and a raised floor rebuilt, allow two. You are told which at the visit, not once we have started.
Can we keep using the loft for storage?
Yes, with loft legs and a raised floor over the area you actually use. Boards resting on the joists flatten the wool underneath and waste the money, so we lift the boards, lay full depth and put the floor back higher.
There is already insulation up there. Why add more?
Because it has settled, and because the depth expected has moved. A thin flat layer leaves the U value of that ceiling well short of what Part L asks for now. Cross laying new material over the old is cheaper than clearing it out and starting again.
Will a warmer house up here mean more condensation?
Not while the eaves stay open. What changes is the temperature of the roof space, and a colder roof space condenses moisture the house is producing anyway. Trays at the eaves and a sealed hatch keep that off the timbers.
Is there anything to apply for?
No, insulating inside a loft changes nothing outside, so even inside the small Brogg Street and Sleight Lane Conservation Area it needs no planning application. If your house is listed, consent can reach inside, so tell us first. Otherwise, loft insulation on a Corfe Mullen house is simply work you can have done. Building control sets the standard, not a planning officer.
Nearby, and next door
Loft insulation near Corfe Mullen
Nearby places we also cover for loft insulation, with straight-line distances from Corfe Mullen, and the other trades we offer in Corfe Mullen itself.
Loft insulation nearby
Our other trades in Corfe Mullen
Loft insulation guides
Part L: do you have to insulate when you re-roof? Loft condensation or a roof leak: how to tell PIR board vs mineral wool: which insulation?Everything we do in Corfe Mullen Loft insulation, all areas Every area we cover
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Find out what is under your loft boards
Thomas lifts a board, measures what is actually there and prices the loft line by line. The visit and the quote are free.