Cavity Wall Insulation has been surveying and installing in Derby for years — cavity-wall fill, loft top-ups, internal and external wall systems, and underfloor work. Derby has a particularly mixed housing stock — pre-1919 solid-wall terraces sit alongside 1930s semis, post-war local-authority builds and modern cavity-wall estates on the outskirts.
Derby has a particularly mixed housing stock — pre-1919 solid-wall terraces sit alongside 1930s semis, post-war local-authority builds and modern cavity-wall estates on the outskirts. Each construction era reacts differently to insulation, which is why a one-line phone quote is almost always wrong for Derby.
Heating-degree-day data for Derby sits above the national average — translating roughly to a longer heating season than most southern towns. That extra month or two of running the boiler is where insulation pays itself back the fastest.
Whatever your property type, we'll specify the right system. These are the services we install across Derby and the surrounding area.
Top-up or full re-lay to current depth standards, with hatch draught-proofing.
Bonded bead or blown fibre, drilled and pumped with a written 25-year guarantee.
Render-finish system for solid-wall homes — warmth and weatherproofing in one.
Slim breathable boards for listed and conservation properties.
Mineral wool or rigid board between joists; stops cold from below.
Safe foam removal from awkward voids, surveyed and extracted to current standards.
Solid-wall terraces in Derby benefit most from internal wall insulation on north and west elevations — usually 60–80 mm of breathable wood-fibre or PIR with vapour-control detailing — combined with a loft re-lay.
Repeat business and neighbour referrals make up the majority of the work we do in Derby. We'd rather earn the next job from the last one than chase leads with pressure tactics.
Four steps, no surprises. We follow the same process on every property in Derby.
A local surveyor visits, inspects the loft, walls and any exposed floor voids, and asks about damp history, ventilation and any planned building work.
Itemised by measure — loft top-up, cavity fill, EWI per elevation — with materials, guarantee scope and labour broken out separately. No surprise extras.
Two or three-person team, dust sheets down, all access points (loft hatch, drilled holes) reinstated and made good before we leave site.
Walk-through with the lead installer. You get the guarantee paperwork the same day and a follow-up call after the first heating month.
A few representative jobs from our recent work in and around Derby.
Underfloor and skirting insulation on a single-storey park home that had been close to uninhabitable in winter. Used moisture-tolerant boards beneath the floor and breathable skirting infill. Owner reported the heating coming on half as often.
1960s cavity-wall property with original mineral fibre fill that had slumped on the gable. We extracted the failed material, refilled with bonded bead, and topped the loft from 100 mm to 300 mm. Owner reported the upstairs bedrooms holding heat through the night for the first time in a decade.
Solid-wall mid-terrace with damp staining on the north wall. Specified breathable internal wood-fibre boards on two external walls and re-laid the loft. The damp resolved within six weeks as the wall fabric began to dry, with no chemical treatment needed.
Insulation done badly is worse than no insulation. These are the issues we're called out to remediate most often in Derby.
All cavity-wall installs in Derby come with the independent CIGA 25-year guarantee, which is transferable if you sell the property. Loft and underfloor installs carry our own 10-year workmanship guarantee on top of the manufacturer warranty.
Yes. We regularly survey listed buildings and properties in conservation areas around Derby. The specification almost always uses breathable internal wall systems rather than cavity or external fill, and we'll handle the consents conversation with your local planning office if needed.
Someone over 18 needs to be on site at the start of the day to grant access and at the end for sign-off. You don't need to be present during the install itself — most cavity work happens externally and most loft work is contained to the loft space.
Yes. Cavity extraction is a service we offer across Derby as a standalone job or as part of a refill. We use specialist whirling-chain equipment to remove slumped or damp material before refilling with bonded bead.
Minimal. Cavity wall is mostly external — neighbours rarely realise it's happening. Loft work creates a couple of hours of activity in the access room below the hatch. We use dust sheets, leave the property clean, and put the loft hatch back as we found it.
A standard 3-bed semi in Derby is normally drilled, filled and reinstated within a single working day. The team arrives between 8:00 and 8:30, the install itself usually takes four to six hours, and the drill holes are colour-matched to the existing mortar before we leave.