About Kisezu
Kisezu insulates houses and flats across four districts of London, working on lofts, walls, floors and roofs. This page sets out how the company started, what it aims to do and how the team approaches each job.
How Kisezu Started
Kisezu was set up in 2023 by a small group of tradespeople who had spent years fitting insulation for larger contractors and kept hearing the same complaint from homeowners: nobody explained what was actually being installed or why. The founders decided to build a company that would keep instructions plain and pricing visible before any work started. The first jobs were loft conversions in terraced houses around Brick Lane, using mineral wool and rigid board on flat and pitched roofs. Word spread locally, and within the first year the team had taken on flat insulation projects in blocks nearby, along with cavity wall work in older Victorian properties that needed careful handling of existing brickwork.
Loft insulation fitting, one of the company's first project types.
Mission and Approach
The mission at Kisezu is straightforward: reduce heat loss in a property using materials suited to its construction, and explain each step of that process to the person paying for it. This means a site visit before any quote, a written breakdown of material and labour costs, and a fixed schedule for the job itself. The company does not promise specific savings on energy bills, since every property loses heat differently depending on age, ventilation and current insulation levels. Instead, the focus stays on the standard of installation: correct vapour barriers, no gaps in board joints, and ventilation left clear where building regulations require it.
Rigid board being cut to size for a wall insulation job.
Core Values
Three things guide day-to-day decisions at Kisezu: clear communication before a contract is signed, tidy work on site, and a willingness to say when a property is not a good candidate for a particular insulation type. Below is a short summary of how these values show up in practice.
Clear Quotes
Every quote lists material type, thickness and labour hours separately, so there are no surprises once work begins.
Site Care
Floors and furniture are covered before work starts, and offcuts and packaging are cleared at the end of each day.
Honest Advice
If a wall or loft is not suited to a particular method, the team says so rather than fitting it anyway.
Experience in Numbers
Kisezu has been trading since 2023 and now has 15 people across surveying, installation and office support. In just over three years the team has completed 739 jobs for 585 clients across four districts of London, and 154 of those clients returned for a second project, usually moving from loft insulation to wall or floor work once they had seen the first job finished. Most enquiries get a reply within 4 hours during business hours, and the company currently lists 13 separate insulation services covering lofts, walls, floors, roofs and pipework.
Talk to the Team
Send details of your property and the areas you want insulated, and Kisezu will get back to you with next steps.
Contact Kisezu