Roof insulation
Keeps heat in and summer heat out — save up to 30%.
From €20,- per m²
123 Isolatie
Roof, floor, ground, bio-based and cavity wall insulation — installed carefully, cleanly, and with materials that perform.
8
Years of experience
1000+
Projects completed
100%
Satisfied clients
100%
Nationwide coverage
Our insulation solutions
Every property is different. We recommend the right measure for comfort, savings, and a healthier indoor climate.
Keeps heat in and summer heat out — save up to 30%.
From €20,- per m²
Warmer floors with underside crawl-space insulation.
From €24,- per m²
Warmer under the floor, less moisture from the crawl space.
From €24,- per m²
Natural insulation with renewable raw materials.
From €29,- per m²
Fast, clean and noticeably more comfortable — less heat loss through the façade.
From €12,- per m²
ISDE & local schemes
Subsidies lower your net costs. We highlight what’s available and help you apply correctly.
FAQ
Answers to the questions we hear most often.
A phone consultation is always free. Based on your home details we give a first estimate. Prefer a visit? Book a no-obligation on-site assessment.
You cut energy costs, feel fewer drafts, enjoy steadier temperatures, and reduce moisture issues. With subsidies, the investment often pays back faster than expected.
It depends on home type, surface area, and energy prices. Our calculator gives a quick estimate including ISDE. During the site visit we validate assumptions so the projection stays realistic.
With the national ISDE subsidy you can typically recover around 15% for a single measure. Combine two or more within 24 months and that can rise to about 30%. We help you complete the application correctly.
Google reviews
Worth their weight in gold
“Great organisation. They do what they say and deliver quality! I am extremely satisfied with their work. Contact was positive right from the start. The people at 123isolatie are worth their weight in gold. I can recommend 123isolatie to everyone. A top company with honest people! Don't wait any longer and choose this company. I have a warm floor thanks to their expertise!”
Highly professional
“I had our crawl space insulated with PIF and bottom foil, first by another company, and very poor insulation work was done and delivered. This insulation and work had to be repaired by 123isolatie. I can be very clear that 123isolatie is very professional and delivers excellent work. Communication and explanation of everything was also very clear and understandable. There was even a random inspection by the independent quality-mark company Insula to check whether everything was installed and finished properly and according to standards. Even the Insula inspector said that 123isolatie had repaired the poor insulation work of the other company very neatly and well. In other words: 123isolatie is highly recommended!”
Skilled and fast
“During an introductory meeting with Mr. Salih about insulating my crawl space, it was explained professionally and clearly how the insulation process works. Within 7 days, two men were at the door and cheerfully started the job. The work was completed within two and a half hours. I was shown photos of the result, all to my full satisfaction. In short: 123isolatie is the company to go to — and at a good price too!”
Find out which insulation step delivers the most for your home — personal and non-binding.
100% free consultation