Thin reflective insulation for roofs, walls, lofts, and floors
Superfoil is a multi-layer reflective insulation built around aluminium foil, insulating wadding, and trapped air gaps. The reflective surfaces bounce radiant heat back, while the wadding and air pockets slow conduction and convection. It also doubles as a vapour control layer, which simplifies the build-up on lofts and timber-frame walls.
We fit Superfoil in pitched roofs (between rafters or under battens), in stud walls and timber-frame builds, in cold lofts, and on suspended floors. Garden rooms and outbuildings benefit from it especially because it adds real performance without taking up much depth. It works on its own and pairs neatly with mineral wool or PIR where you need a higher overall U-value.
Because it's thin, Superfoil is the right call when you can't lose room height or rafter depth to a thick fibre layer. The integrated vapour control means you don't need a separate VCL membrane, which keeps the install tidy and removes one of the common ways condensation gets into a build-up.
We start with a free survey to look at the structure, the depth available, and what you're trying to achieve. From there we agree the right Superfoil specification, write you a fixed price, and book the install. Cost depends on area, access, and whether it's being fitted on its own or combined with other insulation.
David B
Brad has done two jobs for me now at my home in Keswick (CA12 area). Each time he has been on time, and took great care to help with any queries I had and offer unbiased advice. Brad takes great care to ensure his prices are as fair as can be as well. He works very hard with his small team to get the jobs done. Recommended for anyone in the Cumbria area needing loft insulation or boarding work.
Alan Davey
Brad and Zach promt , professional, very reliable , all work carried out with care n consideration was informed every step of the way, great service and great lads , I would highly recommend this company
Bob Stoner
Working out of their typical area, Brad responded quickly to determine the size of the problem. He visited the property to assess the number of insulation rolls required and to discern any difficulties with a 19thC cottage. On the day Zak and Brad worked hard to double layer the loft, especially into the eves, where it was permitting cold air to sink into the rooms below. They also provided images of the insulated area and highlighted the presence of a roof hatch from possibly the original build.We were delighted with their work and very highly recommend them.
jo bloggs
Great service - work carried out promptly and efficiently at a very reasonable price. Highly recommend!
We cover Cumbria, the Lake District, Northumberland, Dumfries & Galloway, and the Scottish Borders. Typical towns include Carlisle, Wigton, Penrith, Keswick, Kendal, Workington, Whitehaven, Hexham, Dumfries, and Annan. If you're not sure whether we cover you, call 07899 988437 and we'll give you a straight answer.
Brad spent five years fitting loft insulation full time in Portsmouth before setting up 714 Insulation in Cumbria. The business has grown steadily through word of mouth, and the work is shared day-to-day between Brad and his colleague Zach.
Yes. Every job starts with a free, no-obligation survey. We look at the loft, talk through what you need, and give you a written fixed price. There's no charge whether you go ahead or not.
We accept bank transfer and cash. Payment is taken on completion of the work once you're happy with the result. For larger jobs we're happy to agree a small deposit and a balance-on-completion schedule upfront.
Brad or Zach. Usually both on larger jobs. We don't use subcontractors or agency fitters, so the person who quoted the work is the person fitting it.
Yes. Every install comes with a workmanship guarantee. If anything is not right with the fit, we'll come back and put it right, no argument. We also register manufacturer-backed product guarantees on the insulation where the product offers one.
Most free surveys are booked within a week, often sooner depending on where you are in the coverage area. Installs themselves are typically scheduled one to three weeks after quoting, and we'll always give you a realistic date rather than the optimistic one.
While you can often top up existing insulation, removal is recommended if the old material is damp, compressed, mouse-contaminated, covered in soot from old chimneys, or so old it's lost its thermal value. Laying new insulation on top of failed material locks in the problem. A quick survey tells us which category your loft is in.
If the old insulation is dry, clean, and in good condition, yes. Laying fresh mineral wool on top to bring the overall depth up to 270-300mm is a quick and effective upgrade. If the old material has any of the problems mentioned above, removal is the better call. We'll show you what we find before you decide.
Most removal-and-replace jobs fall between £900 and £4,400. The range reflects loft size, how bad the existing material is, and whether any boarding or awkward access is involved. We quote a fixed price in writing after the free survey so you know exactly what you're committing to.
We bag the old material carefully inside the loft using heavy-duty rubble sacks, and we use vacuum extraction on the finer debris where needed. The sacks go straight out to the van. We cover flooring and landings on the way through to keep the rest of the house clean.
We remove it from site and dispose of it at a licensed waste facility. You don't need to arrange a skip or a separate collection. Disposal is included in the quoted price, so there are no surprise fees on the day.
Yes. Mouse and squirrel contamination is common in older Cumbrian properties, particularly rural ones. We bag and remove the affected material, clean down, and re-insulate with fresh mineral wool. If there's an active rodent issue we'll flag it and suggest getting a pest professional in first so the new insulation isn't immediately contaminated too.
Most jobs are completed in a single day. Very large lofts or properties with difficult access sometimes run into a second day. We'll give you a realistic time estimate as part of the written quote so you can plan around us.
Current Building Regulations (Part L) recommend 270mm of mineral wool, and many installers now go to 300mm to account for settlement over time. Much below 270mm and you're leaving money on the table. We install to 270-300mm as standard.
For a standard 270mm depth, a typical 3-bed semi needs roughly 40-50 square metres of coverage. We measure the loft during the free survey and include the exact material quantity in the quote, so there's no guesswork or shortfall.
Most new-install jobs fall between £500 and £2,500, depending on loft size, access, and whether you need boarding walkways laid at the same time. You'll get a fixed written price on the day of the free survey, not a rough "from" figure.
A standard loft install is almost always finished in a single day. Bigger properties or jobs where we're also fitting crawl boards, hatch upgrades, or tank jackets might run longer, but you'll know before we start.
We install Knauf and Superglass mineral wool as standard. Both are UK-manufactured, allergy-safer than older fibre types, with excellent thermal and sound performance, and non-combustible. For customers who want a natural, breathable alternative, we also fit sheep's wool insulation, which handles moisture and humidity well and is fully sustainable. We'll talk you through the options on the free survey.
Yes. Alongside our standard Knauf and Superglass mineral wool, we install sheep's wool loft insulation for customers who want a natural option. Sheep's wool is breathable, regulates moisture and humidity well, is fully sustainable, and avoids the synthetic fibres some homeowners would rather not have above their ceilings. It costs more than mineral wool, so we price both on the free survey and let you choose what fits the property and the budget.
For most straightforward loft insulation upgrades, no approval is needed; it's exempt work. We install to the Part L standard as a matter of course, so if you ever do need to demonstrate compliance (for example, during a property sale), the work is already there.
Not when it's done properly. We always check eaves ventilation is clear, leave a ventilation path at the edges, and never stuff insulation hard against the roofing felt. That keeps air moving and moisture moving out. Most loft damp issues are from blocked vents, not from insulation itself.
Depending on your situation, you may qualify for government-backed schemes like ECO4 or GBIS, which can contribute to the cost of loft insulation. We aren't currently a grant-registered installer, so we quote on a straight paid-for basis, but we'll always flag it if we think you'd be better off applying to a scheme first.
PIR (polyisocyanurate) insulation is a rigid foam board with very high thermal performance for its thickness. It's used in walls, roofs, and floors where you want a serious thermal upgrade without losing too much room depth to a thicker fibre layer.
Once it's in, PIR cuts heat loss and reduces the energy needed to keep a building warm, which is a real environmental win over the life of the building. The manufacturing process does have an environmental footprint, but the in-use savings typically outweigh it many times over.
The board itself resists moisture and won't grow mould. Problems only show up when the install allows warm, moist air to reach a cold surface, for example through gaps in the boards or a missing vapour control layer. That's why we tape joints, seal perimeters, and ventilate where the build-up needs it.
In almost every case, yes. PIR cuts heat loss through whatever surface it's fitted to, so your heating runs less to hold the same room temperature. The actual saving depends on what the property had before and how cold the space was running.
PIR pricing depends on the board thickness, the area to be covered, and how easy or awkward the space is to work in. We quote a fixed price on a free site survey rather than giving a misleading "from" figure, so you'll know exactly what the job costs before we start.
Superfoil is a multi-layer reflective insulation made up of aluminium foil, insulating wadding, and small trapped air gaps. It delivers thermal performance and acts as a vapour control layer at the same time, which simplifies the build-up on lofts, walls, and timber frame.
We fit Superfoil in roofs, walls, floors, lofts, timber-frame builds, garden rooms, and outbuildings. It's especially useful where there isn't much depth to play with, because it adds real thermal performance without taking up the space a thick fibre layer would.
It combines reflective foil layers, insulating wadding, and small air gaps to deal with all three modes of heat transfer at once. The foil bounces radiant heat back, the wadding slows conductive heat, and the air gaps reduce convective movement. Together, that's the thermal performance you feel in the room.