Loft insulation in Cadnam and Bartley
Loft floors brought up to depth, sloping ceilings insulated at rafter level, and the eaves left breathing, across Cadnam, Bartley and the SO40 lanes.
The site visit is free and so is the written itemised quote. Thomas Hannen prices every job himself.
Last updated
The usual answer for a Cadnam or Bartley loft is 270mm of mineral wool, most often a second layer across the joists over the old one. A cold loft is meant to be cold: the wool keeps the heat below, the eaves stay ventilated so the roof can breathe, boarding is raised, and the tank and pipes are insulated because they now sit outside the warm. Walls and floors are on our Cadnam and Bartley insulation page.
When to call
A thin loft floor, or a roof room that swings
Roofs along these lanes are ordinary lofts or old conversions. The ordinary loft has a thin, settled layer, bare timber showing round the edges and bedrooms that say so from October onwards.
The other is a roof converted years ago that behaves like a tent. Freezing in January, unbearable by July. That is nearly always board fitted loose in the bays, or fitted with no air gap left behind it.
Both want a torch and a tape rather than a figure down the phone. We measure what is genuinely in your Cadnam and Bartley loft, look along the eaves from the inside, photograph what we find and set it out in a written itemised quote. The survey and the quote are free, and if your ceiling is already right you will hear that.
The work
Over the ceiling, or up against the rafters
Over the ceiling, where there is still a loft. Under a cold roof everything goes above the ceiling and the space over it stays cold deliberately. What is usually in a Cadnam and Bartley loft is one settled layer pressed down between the joists with nothing at all on top of them.
The fix is a second run of roll turned square to the first and laid across the joists, so the timber ends up covered rather than left proud. Get to about 270mm and the ceiling sits at the u value Approved Document L expects after a renovation. Glass wool roll for the long clear runs, rockwool batts where the spacing is untidy, loose fill in corners the bracing has closed off, sheep wool if you would prefer it.
Up against the rafters, where the roof is a room. Once a Cadnam and Bartley loft has become a room the floor under your feet is no longer the surface losing your heat. Sloping ceilings, dormer cheeks and the flat top all want rigid board. PIR such as Celotex is cut tight to each rafter bay with an air gap kept above it, a second layer goes under the rafters to kill the bridge through the timber, and a taped vapour control layer closes the lot so warm air never travels far enough into the build up to find its dew point. Where depth has run out altogether, multi-foil quilt is what fits.
The eaves decide whether either of them works. On a Cadnam and Bartley roof, new material is taken out over the wall plate and stopped there, and a vent tray in every rafter bay holds the gap open above it, so ventilation still runs the width of the roof and the felt stays dry. Old bitumen underlay with the soffits boxed in under it is a choked roof already, and the first sign of that is condensation on the underside of the felt with black mould spreading behind it. Where the eaves cannot be opened back up, a ridge vent goes on first. Approved Document F carries the standard, and what you are avoiding is interstitial condensation, which does its damage where nobody is looking.
The things that get left off other quotes. Recessed lights in a Cadnam and Bartley house get a fire rated hood apiece, never wool tucked round the fitting. Wiring comes up out of the layer and is clipped above it, since cable buried in insulation runs warm. The cold water tank and every run of pipework by it are suddenly outside the warm part of the house, so lagging goes on the same day. If the loft carries the suitcases, the boarding comes up and goes back on loft legs high enough to leave the depth uncrushed, and the loft ladder is checked so it still swings under the raised floor. The hatch takes a board on its back and a seal, because an open hatch undoes a good deal of what has just been laid. How we get up there is agreed at the survey, since it is work at height indoors as much as out.
How it runs
A loft top-up in a bungalow or chalet: how the day goes
Thomas takes a torch into your Cadnam and Bartley loft before pricing. He measures the depth already there, checks the joists and eaves, looks for damp on the underside of the felt, and notes what is in the way: cold water tank, boxes, cables, downlighters.
Plenty of lofts in Cadnam and Bartley sit over bungalows and detached houses from around the late sixties, with trussed rafters and a thin, squashed layer of quilt. On a chalet bungalow there are only small voids behind the knee walls. The written quote has a line each for the survey, lifting and bagging the old quilt, new mineral wool and its depth, clearing the eaves, the hatch, lagging the pipework, and taking it all away.
One layer runs between the joists and a second crosses over them so no timber is left bare. The landing is sheeted and the old insulation leaves in bags. Wet timbers found up there are shown to you in a photo, with a price, before anything else.
Insulation laid in a Cadnam and Bartley loft is not development and needs no application, as Planning Portal guidance on insulation confirms, so permitted development limits do not come into it. Building control comes in when the roof itself is renovated, and regulation 23 then brings the whole element up to standard. For an older Forest cottage, the National Park's heritage and conservation guidance is worth a read.
Cost
Awkward edges, not floor area, set the loft price
A loft in Cadnam or Bartley is not priced by floor area. The open middle is fast; the edges eat the time.
The way in. A bungalow hatch you can stand a stepladder under is easy. A hatch on the half landing of a period cottage, or over the stairwell, needs a platform built first. A sixties trussed roof criss-crossed with bracing means working round every timber, and boarding has to be lifted and relaid.
What is up there now. Old quilt that is damp, filthy or flattened comes out, is bagged and removed. Stored boxes are moved and put back, and if you want to keep storing things, raised legs and boarding above the new layer are an extra line. Joists at 400 centres with a clear run go quickly; a cluttered crawl space does not.
Eaves and awkward corners. The quilt stops short of the wall plate so the eaves keep breathing. Full depth into the corners, round the hatch and over downlighters, plus lagging the tank and pipes, is where most of the labour goes. Approved Document L sets the target.
Chalet voids. Behind a chalet bungalow's knee walls the spaces are cramped, and take longer than their size suggests.
Ask a rival installer how deep and in how many layers, whether old quilt is coming out, and whether the eaves will be left clear.
If the loft is wet
Water dripping off the felt, or mould on the rafters
Beads of water on the underside of the felt, black spots on the rafters or quilt that feels damp all point to warm, wet air getting into a loft with no way out. Adding insulation now would make it worse. Phone rather than use the form.
We start by finding the source: often blocked eaves vents, a bathroom or kitchen fan blowing into the loft, or a gap round the hatch. We clear what we can on the spot so the roof timbers begin to dry. Scheduled work runs Monday to Friday, 8am to 6pm. Ring about a damp loft rather than waiting, and if nobody takes the call we phone you back as soon as possible.
Worth knowing
Inside the National Park, it is what shows that gets looked at
Cadnam and Bartley sit inside the New Forest National Park, and the Authority handles planning for addresses inside the Park boundary, with New Forest District Council for any just outside it. Bartley also falls inside the Forest North East Conservation Area, which Cadnam village sits just outside, so a rooflight or tile vent on a Bartley roof gets a closer look.
For a loft that changes nothing, as long as the work stays inside it. Material over a ceiling, boards on loft legs, a sealed hatch, rigid board against the rafters: none of it is visible from the lane and none of it needs anybody's permission.
What does get looked at is anything that appears on the outside. A rooflight to make a roof room usable, a dormer, a run of vent tiles across a slope, even a changed eaves detail can be scrutinised here in a way it would not be a few miles down the road. So where a roof genuinely needs more ventilation and it is prominent from the lane, we look at soffit and over fascia vents at eaves level before we look at putting anything through the slope. The National Park Authority's interactive property map will tell you which designations sit on your address, and it is worth a look before you plan anything that changes what the roof looks like.
Who you are dealing with
Who goes up into your loft
We cover Cadnam, Bartley, Copythorne, Ashurst and the SO40 lanes around them, 17.5 miles as the crow flies from our base in Boscombe, with the New Forest National Park Authority handling planning inside the Park. Bournemouth Roofing & Building Ltd is registered in England and Wales, company number 15471719. Before you book a visit in Cadnam and Bartley, you can read our customers' Google reviews, word for word, on our reviews page.
Thomas Hannen, who owns the business, is the one with the torch in your loft, measuring up and pricing it himself. A verified customer scored us 10 out of 10 on Checkatrade. The survey visit is free, and the itemised written quote that follows it is free too.
Planning at a glance
Do you need planning permission in Cadnam and Bartley?
Most repairs in Cadnam and Bartley 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 Cadnam and Bartley |
|---|---|
| Who decides | New Forest National Park Authority is the planning authority for Cadnam and Bartley. New Forest National Park Authority's heritage pages set out what it controls. |
| Conservation area | Yes: Forest North East Conservation Area. Check whether your street is inside the boundary before changing anything visible. |
| Listed buildings | Yes, there are listed buildings in and around Cadnam and Bartley. If yours is one, work can need listed building consent. |
| Protected landscape | Inside the New Forest National Park, where design is looked at more closely and permitted development rights are narrower. |
Questions
Questions about loft insulation in Cadnam and Bartley
We have rooms in the roof. Is this even a loft job?
Yes, rooms in the roof are still loft insulation work, done by a different method. Nothing you lay on a floor helps a room in the roof, because the heat is going through the sloping ceilings and the dormer cheeks. Those get rigid board between and under the rafters with an air gap kept above, and the work is done from inside, room by room.
Will insulating the sloping ceilings cause condensation?
Not if the build up is right. What matters is a continuous taped vapour control layer on the warm side, so moist air from the room cannot get into the construction, and a clear ventilated gap between the board and the underlay. Get either wrong and the dew point lands inside the timber, which is exactly the problem you were trying to avoid.
Do we need permission from the National Park?
Not for insulation: nothing you do inside the roof needs an application, whatever designation sits over the address. It is only when something appears on the outside, a rooflight, a dormer, tile vents, that the Authority has a view, and that is worth checking before you order anything rather than after.
How long does it take, and does it show on the bill?
A cold loft floor is usually half a day to a day. Rafter level work in a roof room is longer because every cut is a fitted one. Heat loss through the roof is one of the larger losses 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.
Nearby, and next door
Loft insulation near Cadnam and Bartley
Nearby places we also cover for loft insulation, with straight-line distances from Cadnam and Bartley, and the other trades we offer in Cadnam and Bartley itself.
Loft insulation nearby
Our other trades in Cadnam and Bartley
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 Ringwood Loft insulation, all areas Every area we cover
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Tell us the address and whether it is a loft or a room in the roof. We will come out, look properly, and put an itemised price in writing. No charge, no obligation.