Roof & wall insulation specialists

Insulate better.
Live better.

Professional roof and external wall insulation for a warmer, more energy-efficient and sustainable home.

  • Roof Insulation
  • External Wall Insulation
  • Energy Renovation
Modern house with a freshly insulated and rendered facade
Roof insulationBetween and under the rafters
Facade insulationInsulated, rendered, finished
ASL BOUW BV logo
Our services

Two upgrades that change how your home performs.

Cutaway of a pitched roof showing its insulation layers

Roof Insulation

A large share of a home's heat escapes through an uninsulated roof. Professional roof insulation closes that gap.

  • Reduces heat loss through the roof
  • Lowers energy bills
  • Improves thermal comfort all year
  • Better protection against summer heat
  • Reduces environmental impact
  • Increases property value
Explore Roof Insulation
Renovated townhouse with a rendered insulated facade

External Wall Insulation

Both an energy upgrade and an architectural transformation: the whole envelope is wrapped and the house gets a new finish.

  • Improved thermal performance
  • Fewer thermal bridges
  • Lasting weather protection
  • A renewed facade appearance
  • Lower heating consumption
  • Long-term protection of the building
Explore External Wall Insulation

Less Heat Loss

A continuous insulation layer keeps warmth inside in winter and heat outside in summer.

Lower Energy Consumption

Your heating system works less to reach and hold the same temperature.

Greater Indoor Comfort

Stable room temperatures, fewer cold surfaces and draughts, a quieter home.

Smaller Environmental Footprint

Less energy used means fewer emissions, every single year.

Why ASL BOUW BV

Specialists, not generalists.

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.

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.

Before and after

Drag to see the difference.

The same house after external wall insulation and a new render finish
Older brick house before renovation
BeforeAfter
Our projects

Roofs, facades and the details in between.

Rendered facade and timber extension
Rendered facade and timber extensionFacade
Roof insulation between the rafters
Roof insulation between the raftersRoof
Window reveal detail
Window reveal detailDetail
Re-tiled, insulated roof
Re-tiled, insulated roofRoof
External wall insulation in progress
External wall insulation in progressFacade
Complete exterior renovation
Complete exterior renovationRenovation
Wood fibre insulation and mineral wool with a green leaf
Sustainability

Better insulation. Lower energy demand. A more sustainable home.

High-quality insulation removes unnecessary energy consumption year after year, while keeping the house comfortable in winter and summer.

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Type of project

No obligation · Personal advice · Professional assessment

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