Insulation in Blandford Forum
Loft, rafter level and internal wall insulation in Blandford Forum, planned around the conservation area and the listings rather than against them.
The site visit is free and so is the written itemised quote. Thomas Hannen prices every job himself.
Blandford Forum splits neatly into two insulation jobs. On the post-war and later housing round the edge of the town it is a straightforward loft top-up, laid over the joists and finished in a day. In the older brick houses nearer the middle there is no cavity to fill and often no proper loft to lay anything in, so the work goes in at rafter level or on the inside face of a wall, and it needs thinking about first.
What gets us called out here is usually one of three things. A bedroom in an old town house that is cold on one wall and only that wall. A loft nobody has been into for years, where the original wool has flattened and slumped away from the edges. Or a top floor flat where the heat goes straight up through the ceiling and nobody is sure who owns the roof space above it.
We are half an hour up the road and we work in the town regularly. The site visit is free, the written itemised quote is free, and where the answer is that your loft needs a cross layer and a sealed hatch rather than anything grander, that is what we will put in writing.
The work
One house in five in Blandford has no cavity
Loft top-ups on the estates. The bread and butter. Mineral wool laid between and over the joists, the second layer crossing the first so the timber itself stops carrying heat out through the ceiling, brought up to a depth that gets a cold loft near the 0.16 U-value expected of a renovated roof. Old material that has settled or been compressed under boarding is repaired and laid over. Anything wet or spoiled is bagged and leaves with us, and you see it as a line on the quote rather than as a surprise at the end.
One house in five in Blandford has no cavity. Around one house in five here predates 1919, and a brick house of that age has no cavity, so cavity wall insulation is not on the table and the choice is internal or external. Internal wall insulation means insulated board or PIR between battens on the coldest elevation, taped, boarded and skimmed, which we do ourselves, and it costs you an inch or two of the room. External wall insulation performs better and changes how the building looks, which in this town is a consent question long before it is a building one. On a solid wall we look at where it gets wet first, because a damp wall conducts heat and a lining over it traps the problem.
Those older town roofs were built on site rather than delivered as trusses. Joists sit at whatever spacing the carpenter chose, so rolls are cut in rather than run out. There are purlins to climb over, chimney breasts coming up through the loft to insulate around, and eaves so low at the wall plate that the last stretch is reachable only from outside. That last stretch is where a loft quietly loses a quarter of its depth, so it gets dealt with properly rather than eyeballed from the hatch.
Flats make up close to a quarter of the homes here, and a lot of them are the upper floors of older buildings where the ceiling follows the slope. There the insulation goes between and under the rafters as rigid board, with a vapour control layer and a clear ventilation gap above, or as a multi-layer foil quilt where head height is already tight on a sloping ceiling or a dormer cheek. Room in roof work is priced by the room and the plastering is part of it. Terraced houses are the biggest single type in the town, and on a mid terrace the party walls do some of the work for you while the front and the back take all of the weather, which is worth knowing before you spend anything on the walls. Then the finishing details: an insulated and draught sealed hatch, vent trays to keep the eaves airflow open, lagging on any tank and pipework now that the loft is colder, covers over downlighters, and the storage deck raised on legs rather than screwed down onto the wool it is meant to sit above.
How it runs
From your call to a written price
The quote is itemised: survey, clearing, material and depth, ventilation and disposal on separate lines. Inside a loft, nothing needs planning permission. Outside is different in Blandford: there is a conservation area covering Blandford St Mary and Bryanston, and the town has well over two hundred listed entries, so anything that changes the appearance of an elevation can need consent, and work to a listed building can need listed building consent even when it is internal. We check the address before we quote, and Planning Portal guidance on insulation sets out the ordinary position elsewhere. Building control still applies either way, because regulation 23 means renovating more than half of a thermal element brings the whole element up to standard. Dorset Council for both.
Cost
What decides the price of an insulation job
No rate per square metre: the area is the easy part. A terraced house with the hatch on a narrow landing, a semi on one of the estates with the loft boarded out, and a top floor flat where the roof space is shared are three different jobs before any material is ordered. Old material that has to come out and be bagged is a cost of its own. Approved Document L sets what the work must reach. Ask what depth is going down, whether a solid wall is being looked at from outside first, and who is instructing the work on a flat.
If it is urgent
Damp, condensation or a room you cannot heat
Ring rather than use the form. A dripping loft, black mould that comes back faster than you can wash it off, or a room that will not hold heat gets looked at quickly, and the first visit works out whether it is insulation, ventilation or both. Blandford is half an hour off and we are up there most weeks. The phone is answered 24 hours for emergencies; scheduled work runs Monday to Friday, 8am to 6pm.
Worth knowing
In a town like this, you insulate from the inside out
Blandford carries a conservation area and a long list of listed buildings, and that changes the running order of an insulation job rather than stopping it. The rule of thumb is simple: the further out from the wall you go, the more likely you are to need permission before you need a builder.
External wall insulation sits at the far end of that, because it thickens the elevation, alters the reveals around the windows and changes the finish, which is exactly what conservation area control exists to look at. Listed building consent can be needed for internal work as well, which surprises people who assume the listing stops at the front door.
So we plan these houses from the inside out. Loft first, because it needs no permission at all and it is the cheapest heat you will keep. Then draughts, the hatch, the gaps around pipework and the service holes, which cost little and are felt the same week. Then the coldest single wall, lined internally if the room can spare the depth and if the wall is dry.
That last condition is the one that matters most on old brick. A solid wall gets wet and dries out again by breathing, so before anything is boarded across it we want the rainwater goods, the pointing and the ground level at its base checked. Insulating over a wall that is soaking gives you a warmer room and a wetter wall, and you find out about it a year later.
Who you are dealing with
A local firm you can check
We cover Blandford Forum, Bryanston, Blandford St Mary, Stourpaine and the DT11 addresses around the town, with Dorset Council for planning and building control. Send the postcode if you want to be sure. 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
Blandford Forum questions we get asked
There are hundreds of listed buildings here. Does that affect us?
Only if yours is one, and in Blandford Forum a lot of the town centre addresses are: 209 listed entries, the Ryves Almshouses in the Market Place among them. Listing controls the fabric, so a lined slope or a dormer needs consent. Separately, the Blandford St Mary and Bryanston Conservation Area controls appearance, where like for like maintenance passes and a change of covering does not. Dorset Council settles both before anything is ordered.
We are in a town centre terrace. Can the loft be done?
Usually, though the party wall decides how. Terraces make up 31.1% of Blandford Forum and in the older rows the dividing wall does not always carry up to the underside of the tiles. Where it stops short, your roof space and next door's are one space, and material can only be laid to your own ceiling line without their agreement. We look for that from the hatch on the visit and say plainly which you have.
Can we render insulation over the front of the house?
Not inside the designated area without permission, and often not at all. A rendered jacket changes the depth of every reveal and the line of the eaves, which is what the conservation area exists to control. There is a second reason as well: 18.9% of the town predates 1919, and solid walls of that age need to keep breathing. Where the front is out of the question we look at the rear, the loft and the internal linings.
There is no parking outside our house. What then?
We work round it. A loft job needs the van near enough to carry bags in and out, not a road closure, so a couple of hours on a resident bay or a side street usually does. Where the terraces here give no frontage at all we unload, move the van and carry the rest in. Tell Thomas on the visit which part of the day is quietest on your street and the booking suits it.
Our flat above the shops is freezing. Is there a loft?
Sometimes, and what is above the ceiling decides everything. Flats are 23.7% of Blandford Forum and many are upper floors over commercial ground floors, where the void may be shallow, shared between addresses, or reached only through a hatch on a communal landing. Where there is a usable void we can insulate it. Where the ceiling sits directly under a flat roof, the work belongs with the covering and with whoever owns the structure.
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Want to know what your house can actually have?
We will look at the loft, the walls and the listing, then put the options and the order to do them in writing. The visit and the quote are free.