The Insulation Company helps homeowners arrange loft-insulation assessments, quotations and installation services across the UK.
Northern Ireland · Northern Ireland
Set on the River Foyle around its historic walled centre, Derry/Londonderry has housing that runs from older properties near the walls to the terraced streets that grew with the city's shirt-making and industrial trade. Red-brick Victorian and Edwardian terraces fill areas like the Bogside, Waterside and Rosemount; interwar and post-war housing spreads through Creggan and the outer estates; and there are suburban semis and modern developments toward the city's edge and across the Foyle. That range means loft work here is rarely a single standard job.
We help homeowners across Derry/Londonderry and the surrounding area arrange loft assessments and quotations, and connect them with installation. Depending on the service, work may be completed by The Insulation Company or an approved installation partner.
The city's older terraces often have compact, steeply pitched lofts with awkward access over a steep stair and thin insulation laid years ago and since compressed, and some properties near the walls are older and more sensitive to change. Much of the wider stock is interwar and post-war semi-detached and estate housing across Creggan and the Waterside, typically carrying ageing wool that suits a top-up, frequently with storage boards laid straight onto the joists. Newer estates toward the outer city usually have some insulation already, so the question is whether adding more or improving ventilation and boarding is worthwhile.
Sitting in the north-west, Derry/Londonderry gets the full weight of the wet Atlantic climate, so ventilation and condensation are real considerations. Packing insulation hard into the eaves of an older terrace can block airflow and trap moisture, so we keep the eaves clear and treat ventilation and insulation as one question. On older and historic roofs near the walls we assess how the covering is coping before recommending a build-up.
The wet north-western climate makes condensation and mould common in poorly ventilated Derry/Londonderry lofts. Insulation alone will not cure a moisture problem, so we identify the real cause — airflow, wind-driven rain, a leak or an extractor venting into the loft — before recommending work.
In Derry/Londonderry, cost is driven mainly by loft access on older terraces, the extra care needed near the historic walled centre, whether old insulation needs removing, and any boarding or ventilation work.
Many Derry/Londonderry lofts already have some insulation. Where it is sound we can top it up to a suitable wool build-up; where it is damp, contaminated or compressed we remove and replace it. A short assessment tells you which applies.
These are examples of our work elsewhere, shown to illustrate what a project involves. They did not necessarily take place in Derry/Londonderry.
Emma's front and rear bedrooms, split by a central chimney breast, both cooled quickly. We insulated the 40m² floor on both sides of the chimney to a full 300mm depth.
Example from our project library
Tom noticed condensation on the bedroom windows and rapid overnight heat loss. We gave his compact 31m² loft a full 300mm Knauf glass mineral wool layer, fitted carefully around the hatch and low edge bays.
Example from our project library
Peter's upstairs ran consistently colder than the ground floor even after a heating service. The 46m² loft was almost completely uninsulated, so we installed a full 300mm Knauf glass mineral wool layer from hatch to gable.
Example from our project library
We help homeowners across Derry/Londonderry and nearby towns, from the Bogside, Rosemount and the Waterside to Creggan and the outer estates, as well as Strabane, Limavady and Eglinton. Request an assessment and we'll confirm coverage for your postcode.
Usually, yes, though older and more sensitive properties call for extra care. We assess the roof, keep the eaves clear for airflow and recommend a suitable, sympathetic build-up rather than forcing a standard approach.
The wet north-western climate makes ventilation important. If you have noticed condensation or staining, we look at the cause — airflow, wind-driven rain, a leak or an extractor venting into the loft — because insulation alone will not fix a moisture problem.
Customer feedback
Feedback from customers who have used our insulation services.
The crew showed up on time, explained everything clearly, finished faster than expected, and we noticed the house felt more comfortable almost immediately.
I was looking at getting my roof insulated but was shocked by the price of some of the quotes I received. I stumbled across these guys and could not be more pleased. Great quality work for a fantastic price.
Smooth and stress-free process. The team were polite, efficient and did a great job. Really pleased with the results. Thanks guys!
These guys were the nicest and provided the best service. They did the job much quicker than expected. Very happy with the job and the price. Highly recommend.
The boys were very kind and well advised. They got the job done quickly and smoothly. My loft was in pretty bad shape, as I have a slight hoarding problem, and they passed no judgement. Thank you for your service.
Very good, prompt and friendly service with an excellent result. Very pleased with the outcome. Well done lads.
