Loft insulation in Upton

Three calls come off the estate more than any others. A bedroom at the far end of the house that never gets comfortable, whatever the thermostat is set to.

A loft boarded for storage, where whatever went underneath the boards has been pressed into a mat. And condensation, with beads standing on the felt and mould starting along the timbers.

We look before we price, and that means going up rather than guessing from the landing. Actual depth taken with a rule, the direction of the joists, the state of the wall plate and the eaves, and how much has to be cleared out before anything new can go down. It is photographed. The site visit and the written itemised quote are both free. If the ceiling turns out to be fine, you will be told that rather than sold a van load of rolls.

The finished depth is around 270mm and it goes down in two runs. The first sits between the joists, friction fitted so there is nothing open at the sides. The second is laid across the joists, square to the first, and that is the run which covers the timber. Leave the joist tops showing and every one of them carries heat out through your ceiling, which is why a single layer level with the top of the timber is not a finished job however tidy it looks from the hatch. Approved Document L is where the u value a renovated ceiling should reach comes from. Glass wool roll for the clear runs, rockwool batts where the bays are narrow, loose fill in the corners a roll cannot reach, sheep wool on request, and rigid PIR board where a bungalow eaves closes down to nothing.

Insulating a ceiling makes the roof above it colder, which moves the dew point up into the timbers and gives the vapour coming out of the house somewhere to condense. So the material stops on the wall plate, vent trays hold a continuous air gap at the eaves, and cross ventilation carries the moisture away. On a long shallow roof that gap is the easiest thing in the world to lose, because the pitch closes down and the temptation is to stuff the last stretch. Where soffits are boxed and cannot be opened, ridge vents or vent tiles do it instead, and a breathable membrane changes the detail at the edge and nothing else. Approved Document F is the standard. A blocked eaves is a wet roof bought with the money you saved on heating.

Not everything up there is worth keeping. Old material compresses under boards and knees, thins where cables and aerials were dragged through it, and stops short of the wall on every side. Anything contaminated with droppings, and anything that has been wet, is bagged in the loft and taken away. What is dry and sound stays where it is, gets straightened, has its gaps closed, and the new work goes over the top of it.

Then the fittings. Recessed lights take a rated cover each rather than wool pushed round them. Cables come up out of the layer and are clipped to the timber, since buried wiring runs warm. A cold water tank and its pipework are now standing in cold air, so a jacket and lagging go on the same day and nothing is laid under the tank. The hatch gets insulation on its back, a draught seal, and the loft ladder reset if the new floor catches it. Where the loft has to keep earning its living, the boards go back up on loft legs above full depth and only the platform you use is boarded. And where the roof has been converted, with a dormer or sloping ceilings, the work belongs at rafter level as a warm roof: rigid board between the rafters, a clear gap under the underlay, a layer beneath, joints taped, and multi-foil quilt where nothing thicker will go.

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 needs applying for and no permitted development right is used, which Planning Portal guidance on insulation confirms. Building control is the part that applies, because regulation 23 brings a whole element up to current standard once more than half of it is renovated. There is no conservation area over Upton and only a few listed entries nearby, and listed building consent is where to check if yours is one of them. The VAT rules for energy saving materials are worth a read 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. Upton is close enough to us that a roof space running with water is usually same day or next. The phone is answered 24 hours for emergencies; scheduled work runs Monday to Friday, 8am to 6pm.

Call now: 07435 839745

Most of Upton went up between the late 1960s and the early 1980s, which is exactly when trussed rafters replaced roofs cut on site. That is why so many lofts here look the same from the hatch: a forest of thin timbers set close together, with diagonal bracing and binders crossing the space at knee height and nowhere obvious to put your feet. It is a perfectly good roof. It is simply a slower one to insulate than an open cut roof with purlins you can duck under.

The rule that matters is that nothing in a truss gets cut, notched or drilled. Every member is carrying load and the bracing is what stops the whole set of them folding sideways, so the material is fed in through the hatch in manageable pieces and worked out towards the eaves by hand rather than a brace being taken out to make it easy. If you want boarding for storage it goes on loft legs spanning over the trusses, never screwed into them, and it goes in the middle where the headroom is rather than out where the roof closes down. Anyone who quotes an Upton loft without going up has not seen the bracing they will have to work around.

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