Wall insulation in Ferndown
With no conservation area over the town, insulating the outside face of a house here is a technical decision rather than a planning one.
The site visit is free and so is the written itemised quote. Thomas Hannen prices every job himself.
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Most Ferndown houses have a cavity that can be filled once a borescope shows it clear and dry, and no conservation area boundary crosses the town, so on most houses external insulation is a technical choice too. The parish's one conservation area covers the separate hamlet of Hampreston, and the listed buildings, such as Holy Cross Abbey at Stapehill, are few. Better than four homes in ten here are bungalows. On a bungalow, that combination is worth knowing about before you spend anything.
Ferndown walls tend to fail on one bungalow flank, on the weather side of a filled house, or under new render. A bungalow with one flank that never warms up. A house filled years back, now showing damp on the elevation that takes the weather. An owner about to re-render, wanting to know whether board should go on first.
Specification follows evidence, never the other way about. One small hole drilled in a mortar joint takes a borescope, moisture readings go on the inside face, and a walk round tells us what each elevation gets from the weather. What follows is a free written itemised quote keeping survey, system, junctions and making good on separate lines. For the loft too, see insulation in Ferndown.
The work
Cavity, lining, or a coat on the outside
Step zero, and it costs nothing. Behind render, a nine inch solid wall and an early brick and block cavity are the same object. So we drill, and a borescope answers it: gap or no gap, what width, clean or fouled, dry or wet, empty or already filled. Everything underneath is priced off that reading. On a fair number of walls the reading says spend the money elsewhere.
Cheapest real work: cavity fill. Given a gap that is clear, dry and wide enough, material goes in from outside through a drilled pattern that is made good in matching mortar afterwards. Bonded polystyrene bead travels to the corners and holds position, which is what a weather elevation wants. Blown mineral wool, the older answer, is still sound behind shelter. Single storey work, so a tower does it. A day, usually.
Next rung up: lining rooms from inside. Internal wall insulation, IWI on a quote, covers a solid wall and covers any cavity we have refused to fill. Insulated plasterboard goes on adhesive; batten and stud carry mineral wool or PIR; board and skim finish it. Celotex and Kingspan buy more performance per millimetre, and aerogel earns its keep in a room with no depth to surrender. Reveals, threshold, floor junction and joist ends all get wrapped. Skip those and the heat walks out at the edges of the room you have just paid to line.
Top of the ladder. External wall insulation means board fixed and bonded across the outer face, then a render carrier, then a thin coat finish. One pass wraps a Ferndown house. The cold bridge at corners and eaves that no internal job can ever reach simply stops existing, and no room loses a millimetre of floor. The most complete answer there is. Also the biggest, by a distance.
The line that cheap external quotes leave off. Push the wall face out by a hundred millimetres and everything attached to it has to follow. Eaves overhang extended, or rainwater lands on your new render. Sills replaced or lengthened. Meter box, outside tap, vents and rainwater goods reset. Every window reveal detailed with an insulated return so the openings do not turn cold. Then boundaries: a wall sitting on the line cannot grow sideways onto next door, which quietly takes an elevation or two off the table on a tight plot.
Air, at every level of spend. Fill that has slumped leaves a cold band across the head of the wall. A wet cavity brings penetrating damp through, with black mould behind it. Both read off the borescope and extraction comes before anything else. Then ventilation: trickle vents, an extract fan that genuinely shifts air, air bricks kept clear. Insulation moves the dew point and removes the draughts that were doing the drying, so a taped vapour control layer keeps interstitial condensation out of the build up.
How it runs
Filling a cavity or lining a wall, checked first
Thomas checks the walls in person. He reads the brick bond, measures the wall's depth at a window and, if you agree, drills one small hole so a borescope can show what is inside the cavity. The quote itemises the survey, the borescope look, which system goes in and at what thickness, making good round windows and doors, ventilation works, and disposal. A cavity fill is installed by a registered installer who issues the CIGA certificate.
Most Ferndown homes date from the late 1960s onwards and were built with cavity walls. For cavity fill, small holes are drilled from outside in a grid, the insulation is injected, and each hole is pointed back in a matching mortar. A bungalow is done from the ground or a tower. A block of flats must be done as one building, so the freeholder instructs it. Internal lining goes room by room, and external wall insulation is fixed from scaffold. Nothing is left open overnight, and waste leaves with us. Anything we did not expect is photographed and priced before we go on.
Lining the inside of a wall needs no application, which Planning Portal guidance on insulation confirms. External insulation is usually permitted development on a house in Ferndown, as there is no conservation area there and few listed entries, and Planning Portal guidance on external walls sets the conditions. Dorset Council's listed building pages are where to check an address. It is still notifiable: regulation 23 means a renovated wall must reach the Part L standard in Approved Document L, and building control look at the U value and ventilation together.
Cost
Junctions, not wall area, decide wall insulation costs
Wall insulation here is priced on the detail, not by the square metre. Cavity or solid. Most Ferndown homes have cavities, and an empty, dry one is usually filled inside a day. Where a wall is solid there is nothing to fill, so it gets lined inside or clad outside, and that costs more. The borescope answers the question before any figure is written.
The building. A detached bungalow on a generous plot is the simple case. A purpose built flat in a low block is done as one building, at the freeholder's instruction. A newer corner house may carry more wall and more windows. The platform for drilling, tower or scaffold, follows the HSE guidance on work at height.
Cladding the outside. With no conservation area over the town, external insulation on a bungalow is a real option. It brings new render, longer sills and moved downpipes and fittings, each shown as a line.
Openings and junctions. Around window and door reveals, at the floor, at the eaves and along any party wall, heat leaks and condensation forms if the detail is skimped. That slow work is what a cheap quote drops.
Put the same questions to anyone else: did they look inside the wall, which product at what thickness, how will the reveals be finished, and who makes good the plaster.
If damp has appeared
Wet patches on a wall since it was filled or lined
Call us about this; the form is slower. Mould or wet patches that have turned up on an outside wall after filling or lining point to two likely faults: rain bridging the cavity, or warm air hitting a cold junction.
Say which room and which wall, and whether it is worse after a wet spell or a cold night. Keep the room ventilated and do not paint over the mould yet. Our first visit checks the outer face, the joints and the guttering before anything is pulled out. Wall insulation is scheduled for weekdays, 8am to 6pm. If the line is engaged or unanswered, Thomas calls back as soon as he is able.
Worth knowing
Among the few places where the outside of the wall is your call
Ring the towns around Ferndown and almost every one carries something that governs appearance: a conservation area boundary, a listed entry, an article 4 direction. This one has no conservation area over the town and only a handful of listed buildings, Holy Cross Abbey among them.
For wall insulation that is a working fact rather than trivia. External work is the only route that wraps a building completely, and nearly everywhere else on our patch it opens with an application and an argument about how the street will look. Here it opens with a tape measure.
Standing in place of the planning question is a practical one, and on a bungalow the practical question is the eaves. Overhangs on this stock run shallow. Add board to the wall face and either the roof edge gets extended or the rain comes off the tiles onto your new render. Behind that sits the list of things travelling outwards with the wall: sills, meter box, vents, pipework, the boiler flue, every reveal. None of it is difficult. All of it is time. Which is why an honest external quote here reads longer than a quote for a fill, not shorter, and why one that does not itemise the list is a quote for half a job.
Who you are dealing with
Wall insulation around Stapehill and Wimborne Road East
We insulate walls in Ferndown, Stapehill, the Wimborne Road East side and the BH22 addresses around them. Our base in Boscombe is 5.9 miles from Ferndown, and planning and building control are with Dorset Council. The firm is Bournemouth Roofing & Building Ltd, company number 15471719, registered in England and Wales. Before you book a visit in Ferndown, you can read our customers' Google reviews, word for word, on our reviews page.
It is Thomas Hannen's company, and he carries out the survey and prices the work himself. A customer verified by Checkatrade gave the firm 10 out of 10. The survey and his written quote, set out line by line, are free.
Planning at a glance
Do you need planning permission in Ferndown?
Most repairs in Ferndown 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 Ferndown |
|---|---|
| Who decides | Dorset Council is the planning authority for Ferndown. Dorset Council's heritage pages set out what it controls. |
| Conservation area | None covers Ferndown, so a like-for-like repair is ordinary maintenance. |
| Listed buildings | Yes, Ferndown has listed buildings. If yours is one, or stands in the grounds of one, work can need listed building consent. |
| Protected landscape | No National Park or National Landscape covers Ferndown. |
Questions
Questions about wall insulation in Ferndown
Do I need planning permission for external wall insulation?
Usually not, on an ordinary house in Ferndown. With no conservation area boundary over the town, an unlisted house falls under permitted development, although the conditions attached to that still have to be satisfied. In the separate hamlet of Hampreston, which has its own conservation area, check first.
What has to change on the house when EWI goes on?
Anything fixed to the face of the wall travels out with it: the eaves overhang, the sills, the meter box, vents, outside taps and the rainwater goods. Each window reveal then takes an insulated return.
Can external insulation go right up to my boundary?
Not where the wall stands on the line itself. That face moves outwards by roughly a hundred millimetres, so the elevation needs either an agreement with the neighbour or a different treatment altogether.
Is external better than filling the cavity?
More thorough, and a great deal more work. Where the cavity is clear, dry and wide enough, filling it is quicker and lighter on the pocket, and frequently the sensible call.
How long does an external system take on a bungalow?
Reckon on a fortnight: preparation, the detailing round openings and the drying time between render coats set that, not the area of wall being covered.
Nearby, and next door
Wall insulation near Ferndown
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Wall insulation guides
Damp at the bottom of a wall: what it is PIR board vs mineral wool: which insulation? Hollow-sounding wall: blown plaster or dot and dabEverything we do in Ferndown Wall insulation, all areas Every area we cover
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Get all three options priced against your wall
Thomas comes out, scopes the cavity, measures the eaves and prices the inside and outside routes in writing. The visit and the quote are free.