Loft insulation in Sandford

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

A 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 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 round here 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 most of the heat loss left in a house like this gets stopped.

Ventilation goes in ahead of depth. Insulate a 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.

Same team from first visit to last, one person to ring, and no sub-contracting your work out to somebody you have never met. The quote is itemised, not a figure on the back of a card: the survey, clearing and bagging whatever is up there now, the material and its depth, keeping the eaves clear, the hatch and any pipework, and disposal on separate lines, so you can compare it properly against anyone else's.

Nothing is left open or unusable overnight. The site is swept at the end of each day rather than the end of the job, and what comes out leaves with us. If something turns up once we start that nobody could have seen, you get a photograph and a price before we carry on.

Insulating a roof space is not development, so nothing is applied for and no permitted development right is used, as Planning Portal guidance on insulation sets out. Building control applies where regulation 23 does, which is when more than half of an element is renovated and the whole of it has to reach current standard. There is no conservation area here and only a few listed entries nearby, and listed building consent is where to look if yours is one of them. The VAT rules for energy saving materials are worth reading before you order.

Ring rather than use the form. Droplets on the underside of the felt, black mould spreading across the roof timbers, or insulation that is visibly damp are all telling you the same thing: warm wet air is getting into a space that cannot breathe. That does not wait, because it is the timbers that pay for it. We look before anything is added, because putting more insulation into a loft that cannot ventilate makes it worse. Sandford is twenty minutes from us, so a roof space that has gone wet gets looked at quickly. The phone is answered 24 hours for emergencies; scheduled work runs Monday to Friday, 8am to 6pm.

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 it means we usually know what we are going to find before we open the hatch 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.

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