Wall insulation in Everton

The survey comes first. One Everton hole, a borescope, and a look at the width of the cavity, whether it is clear and whether the ties are bridged with mortar. It also shows an old fill that has failed and slumped, or an outer leaf cracking and letting water into a wet cavity. A narrow or bridged cavity is not a fill, and we would rather tell you that on the first visit than after the holes are drilled.

Bead fill. Bonded polystyrene bead flows into a narrow Everton cavity better than anything else and sets into a mass that cannot slump later. It is blown through a drilled pattern, the holes are made good in a matched mortar, and a bungalow is normally a single day. Low eaves mean it comes off a tower rather than a scaffold, which keeps the access simple.

Blown mineral wool. Water repellent, quick and long established, and the sensible choice on a sheltered wall with a sound outer leaf. On the exposed side of a house this close to the water we would put bead in instead.

Solid walls. The older Everton cottages along the lanes have no cavity at all. A nine inch brick wall cannot be filled, and neither can a rendered rubble one, so it is internal wall insulation or external wall insulation. On a bungalow the internal route is worked room by room and you notice the lost width, because there is no upstairs to spread it over.

What internal lining is made of. Either insulated plasterboard bonded and fixed straight to a flat wall, or PIR board, Celotex or Kingspan, between battens or a timber stud, then boarded and skimmed. Where a wall needs to stay breathable we use wood fibre and a lime plaster instead, so vapour can pass rather than stall inside the build up.

External wall insulation. Board, a render carrier with mesh, then a through coloured finish. On a bungalow it is easier than on most houses because the whole elevation is within reach, and it keeps the masonry warm so interstitial condensation has nowhere to form.

Reveals, eaves and the floor junction. These are most of the labour and all of the risk. A shallow reveal takes a thin aerogel board. The eaves on an Everton bungalow sit low, so the wall head and the joist ends need care. Miss any of them and you have left a cold bridge, and a thermal bridge is where the dew point lands and black mould appears.

Ventilation. Trickle vents, a working extract in the kitchen and bathroom, and air bricks kept clear. Approved Document F sets the expectation, and a tighter house with no way of losing moisture is how a draught becomes damp.

Before any drilling, Thomas comes to Everton to look at the walls. He reads the brick bond, checks the wall depth at a window reveal, and, if you are happy, bores one small hole to see inside the cavity with a borescope.

You then get a written price broken into the survey and borescope check, which insulation system and at what thickness, making good at the windows and doors, ventilation works, and disposal. Any fill goes in through a registered installer, with a CIGA certificate.

Most houses in the village went up after the war and were built with a cavity. Cavity fill goes in through a grid of small holes drilled from outside, and each is pointed up afterwards to match the wall. A bungalow can be done from the ground or a small tower. The older cottages with solid walls take insulated plasterboard on the inside instead, one room at a time, with sockets, skirtings and window reveals refitted as we go. No wall is left open overnight, rooms are cleaned daily and waste goes with us. Anything unexpected is photographed and priced for you before any extra work.

New Forest District Council is the authority. Lining a wall on the inside is not development, as the Planning Portal confirms. Insulating the outside face changes how the house looks and is treated differently. Everton has no conservation area. Building control is involved under regulation 23 once a wall is renovated, and Part L sets the U value it has to reach.

Phone us; the form is slower. Wet patches or black mould showing on an outside wall since it was filled or lined usually come down to rain getting across the cavity, or warm air from the room condensing on a cold edge.

Tell us which room and which wall. In a single storey house it tends to be the coldest corner rather than the whole wall. Wipe the mould down, open a window for a while each day, and leave the painting for now. The first visit checks the outside face, the pointing and the gutters before anything is removed. Wall insulation is booked Monday to Friday, 8am to 6pm. No answer means we ring you back as soon as we can.

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Put the same floor area on one level instead of two and you get roughly the same roof spread over more ground and a longer run of external wall around it. Every room sits on the outside of the building. There is no landing, no stairwell and no upstairs bedroom buffering anything, so heat loss through the walls is a bigger share of the total here than in the two storey houses on the same road.

Everton bungalows change the sums on walls. A cavity fill usually earns its keep faster in a bungalow than anywhere else, because there is simply more wall per household to treat and the work is all within reach off a tower. An internal lining, by contrast, costs you more than it would elsewhere, because you feel the lost width in every single room rather than in half of them.

The vintage matters too. A great many of these bungalows went up in the late fifties and early sixties, when a cavity was often narrow and built with less care about mortar droppings than later work. Sometimes there is a good clear cavity waiting to be filled. Sometimes the borescope shows a gap half bridged with mortar, and the honest answer is to leave it alone and put the money into the loft, the draughts and the coldest room instead.

Nearby places we also cover for wall insulation, with straight-line distances from Everton, and the other trades we offer in Everton itself.

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