Red Squirrel Insulation
Based on rating, review volume, independent sources and verification. Evidence context — not a guarantee of workmanship.
About
Verified insulation in London.
What the public record says
Highlights
"Lee & Donovan were excellent, on time and professional. I am greatly impressed with the hard work they did firstly removing all the old insulation and then the next hard task of relaying the top quality insulation they provided. Friendly and hardworking which hard to find these days. I would definitely recommend them :)"
"Lee went above and beyond to provide excellent service, worked very long hours, was always polite and courteous and left the loft very well insulated. We are noticing the difference. High recommended"
"Excellent loftinsulation and also painting and decorating work"
Detailed reviews
Lee & Donovan were excellent, on time and professional. I am greatly impressed with the hard work they did firstly removing all the old insulation and then the next hard task of relaying the top quality insulation they provided. Friendly and hardworking which hard to find these days. I would definitely recommend them :)
Lee is super helpful, friendly, knowledgeable, enthusiastic and reliable. He worked incredibly hard until the job was done, always polite and forthcoming. He went out of his way to do a good job and it is clearly important to him to be honest and ethical.
Lee went above and beyond to provide excellent service, worked very long hours, was always polite and courteous and left the loft very well insulated. We are noticing the difference. High recommended
Excellent loftinsulation and also painting and decorating work
Lee is very professional and knowledgeable. He and his team completed my loft insulation to a very high standard and everything went really smoothly! I’m really glad that we found him
I would recommend Lee to anyone. I was really impressed with his professionalism and his proficiency - he produced all the paperwork and certification to give me peace of mind. His work was wonderful, very thorough and conscientious, a pleasant man who was very reassuring.
Lee gave a very competitive quote to fix water damage to my ceiling. He went above and beyond to do a meticulous job. The old plaster was removed, rubble taken away, new plasterboard installed and smoothed over, then sanded, stain proofed and painted. Everything was left in an immaculate condition. The work did take slightly longer than expected, but as we all know, the best tradespeople are in high demand, so I didn't mind the wait. The end result is of very high quality and I am extremely pleased. I highly recommend Lee, as he is a tradesperson who cares about a job well done.
Lee worked consistently hard. He met the challenges of the task and discussed the options with me all the way - he worked to my budget. Always polite.
I highly recommend Lee. I requested his help to install internal insulation on the external solid walls of my 1930s flat, and he did an outstanding job. He assessed the property’s needs and designed a bespoke plan to ensure the best insulation solution, preventing future issues while improving warmth and energy efficiency. From the start, he listened to my needs, was communicative, and provided regular updates. He planned and organized the work seamlessly, tackling challenges with ease. Beyond the insulation, Lee identified and addressed other important issues in the flat. His team of skilled tradespeople—including electricians, carpenters, painters, decorators, and cleaners—transformed my flat into a stunning, much warmer, and more comfortable space. Lee’s attention to detail, problem-solving, and pride in his work were evident throughout. Everything was completed to a high standard at a fair price. If you're looking for a skilled builder, Lee is the one to call.
Lee renewed my loft insulation and installed a new loft ladder and hatch. The job involved removing the old hatch and broken ladder, plus the contents of the loft, which included a wooden bed frame, two redundant water tanks & the old, filthy insulation. He kindly removed all the cobwebs too! This job was completed in one day. Lee took great care in my home to ensure no damage & no mess. Communication was excellent from start to finish. Completely professional & reliable, my go to for all building works & repairs. Highly recommend.
We engaged with Lee from Red Squirrel Insulation to insulate our new roof. From initial quote to completing the work, Lee was super helpful and did an excellent job. We were very happy with the insulation work and the high standard of the finish. Most importantly, the new roof and insulation work passed the council inspection for our building notice application with flying colours. Well done and thank you
Rated 5.0★ — in line with the local average for roofers in London
Across 593 rated roofers in London, the typical rating is 4.9★. We compare against the same businesses a homeowner would find searching for this trade locally.
Trust checks and red flags
Every signal, traced to its origin
Review platforms
Official sources
What's strong, and what to check yourself
Public evidence last checked May 2026



