About Us
A construction company that specialises in the building envelope.
ASL BOUW BV is a Belgian insulation contractor focused on roof insulation and external wall insulation. We combine technical knowledge with careful, hands-on workmanship.
Specialists, not generalists.
Many contractors do a bit of everything. ASL BOUW BV does two things and does them properly: insulating roofs and insulating facades. That focus means we know the systems, the materials and the details that make an insulation project perform for decades.
Every project starts with a visit. We look at the structure, the existing layers, moisture, ventilation and the finishing you want. Only then do we recommend a system, and we explain why. During the work you have one point of contact, a clear planning and a site that is left tidy every day.
We work for homeowners across Belgium, on houses of every age: from post-war brick semis to recent builds that need a better envelope.
Why choose ASL BOUW BV
One team for the whole building envelope, with the care of a specialist.
Professional workmanship
Experienced crews who install every layer the way the system requires.
High-quality insulation materials
Proven mineral wool, PIR, EPS and wood fibre systems from established manufacturers.
Careful finishing
Clean reveals, straight edges and details you will not have to look at twice.
Solutions adapted to each property
Every roof and facade is assessed on site before we recommend a system.
Energy-efficiency focused
We design for the lowest realistic energy demand of your home.
Reliable project execution
Clear planning, one point of contact and a site left tidy every day.
Roof and facade expertise
Both parts of the envelope from one team, so the details connect properly.
Our Process
From first visit to final inspection.
- 01
Site Assessment
We inspect the building and determine the most suitable insulation solution.
- 02
Technical Proposal
We recommend the correct insulation system, materials and finishing.
- 03
Professional Installation
Our team carries out the insulation work carefully and efficiently.
- 04
Final Inspection
We verify the installation and finishing before completing the project.
What we stand for.
- Honest advice
- We recommend what your house needs, not the most expensive option.
- Quality materials
- Certified insulation systems from established manufacturers.
- Craftsmanship
- Straight lines, tight joints and finishes we are proud to sign.
- Sustainability
- Lower energy demand for the life of the building, with durable materials.
Let us look at your house.
A site assessment is the first step of every project, and it is free of charge.