Loft insulation in Sandford

The problems follow a pattern. A bedroom that has gone cold by the middle of the night.

A Sandford loft emptied out after years of nobody touching it, where the old layer proves to be flat, patchy and stopping well short of the walls. Or a roof that has begun to sweat, with damp material and mould showing on the rafters.

Nothing in Sandford gets priced before somebody has been up. What is there, how deep it is once a rule goes into it, the direction of the joists, whether the eaves have survived, and what has been stacked on top. The visit is free, the written itemised quote is free, and where the ceiling is already fine you will hear that rather than a sales pitch.

What happens to the old layer. It is rarely worthless and rarely enough. It compresses under boards and feet, settles under its own weight, thins to nothing where cables and aerials were pulled through, goes patchy across the middle, and is missing altogether for a foot all the way round the wall.

Dry and clean, it stays: teased back open, straightened, and its gaps closed. Contaminated with droppings, or wet, it goes into bags and off the site the same day. That decision is made in front of you at the survey rather than after the van has gone.

Depth, and the direction that does the work. The finished job is about 270mm and it arrives as two separate runs. The first drops in between the joists, pushed tight to the sides so no bay is left open at its edge. The second sits on top of the timber and runs the other way, crossing every joist, and that is the run which stops your ceiling giving its heat back in stripes. Nearly all the old jobs around Sandford went without it, which explains how a loft can look completely tidy from the hatch and still leak all winter. Glass wool on the roll where the bays are even, rockwool batts where they are not, loose fill poured into any corner a roll refuses to sit down into, rigid PIR board where there is no headroom to play with, and multi-foil quilt behind that. Approved Document L sets the u value the finished ceiling is expected to reach under Part L, and that second run is where much of the heat loss left in a house like this gets stopped.

Ventilation goes in ahead of depth. Insulate a Sandford ceiling properly and the roof over it turns cold. The dew point shifts upwards into the structure, and the vapour on its way out of your house finds the felt instead. So the material is stopped at the wall plate, vent trays are set in to hold an unbroken channel of air along the eaves, and the roof carries on ventilating itself right across from one side to the other. Where soffits have been boxed in, ridge vents or vent tiles take the work over, and a breathable membrane alters nothing except how the edge is finished. Approved Document F is the standard, and pushing a roll out into the eaves is the fastest way there is to spoil a set of rafter feet, and interstitial condensation will have been at them long before you notice.

Lights, cables, tank, hatch and boards. Every recessed light gets a rated cover over it. Cables come up out of the wool and are clipped to the timber, because cable buried in insulation runs warm. The cold water tank has just been left out in the cold, so it takes a jacket, its pipework takes lagging, and nothing whatever goes underneath the tank. The hatch gets a board of insulation and a draught seal, and if the new floor fouls the loft ladder the ladder is reset. Boarding screwed down onto the joists squashes the layer and throws the depth away, so where the loft still has to hold your things we stand a floor on loft legs and board only the part you walk on. If the roof has already been converted into a room in roof, the job moves up to the rafters instead. Sloping ceilings and dormer cheeks take rigid board between the rafters with a clear gap held under the underlay, a second layer beneath them, every joint taped, and a warm roof that leaves no cold surface for damp air to find.

Thomas goes up through the hatch before he prices anything. In the late sixties and seventies houses in Sandford the loft usually has a thin layer of old quilt, trussed rafters, a water tank and wiring lying across the joists.

Sandford bungalow lofts are long and shallow, with a crawl at the eaves. You get a written figure showing what is coming out and being bagged, the product and how deep it will be laid, the trays or gaps that keep air moving at the eaves, work on the hatch, tank and pipes, and the waste.

The landing and stairs are covered, bags come down tied, and nothing is left lying about overnight. The mineral wool goes in as one layer between the joists and a second laid crossways over them, which closes the cold lines along each joist. Anything carrying water in the cold part of the loft gets lagged, and the hatch gets its own insulation and a draught seal. Signs of damp, a leak or tired cable in the loft are photographed and costed for you first.

Insulating a roof space is not development, as Planning Portal guidance on insulation explains, so nothing is applied for. Regulation 23 brings in building control once more than half of an element is renovated. The village is outside any conservation area, and for the rare listed home, listed building consent is the thing to check. Read the VAT rules for energy saving materials before you buy anything yourself.

If the underside of the felt is dripping, the roof timbers have black mould, or the insulation is damp to touch, warm wet air is getting into a loft that cannot breathe. The timbers pay for that over time.

Do not add more insulation yet, because in a loft with blocked eaves it makes things worse. Check the bathroom extractor is not venting into the loft. Our first visit finds whether it is condensation or a roof leak, and what the ventilation needs. Booked work is Monday to Friday, 8am to 6pm. For a wet loft, a phone call is better than the form. If it rings out, we will be back in touch as soon as we can.

Call now: 07435 839745

Six in ten homes in Sandford went up between the end of the war and the early 1980s, and the biggest single group is late 1960s and early 1970s. Houses built together tend to be improved together, and around here that means most of these lofts got their insulation in the same era, laid to the standard of the day, in one layer, between the joists, and nowhere near the depth anyone asks for now.

That is useful, because on these estates you can usually tell what is up there before the hatch opens, and we can be honest with you about it on the phone. It also means the same fix suits most of the street: keep the old layer where it is sound, close its gaps, and cross lay new roll over the joists to take the whole ceiling to full depth. What varies house to house is the state of the edges, whether anyone has boarded over the top, and whether the eaves have been blocked. If your neighbours are thinking about it too, it is worth asking us to look at more than one loft on the same visit, because the travelling is the part that does not divide.

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

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