Animal-friendly insulation

Did you know that bats, house sparrows, or swifts might be living under your roof or in your cavity walls—without you even knowing it? This is quite common in Wassenaar, especially in older homes. These animals are protected. Fortunately, you can insulate your home while also protecting nature: animal-friendly insulation makes both possible.

How does it work? 

An animal-friendly insulation company relocates the animals before work begins and provides alternative habitats—such as a cavity shelter for bats. Your home is then properly insulated as usual. It’s a win-win.

What should you do before you start? 

You'll go through three steps:

  1. Notify the municipality (at least 5 business days in advance), seal any gaps, and set up alternative shelters.
  2. Let animals fly away—don’t disturb or kill them. An animal-friendly pest control company can help with this.
  3. Wait at least 15 business days after step 1 before you begin insulating.

Would you like to start insulating right away? 

That’s possible, but you’ll need to have an E-DNA survey conducted first. If no bats are detected, you can get started right away. If bats are detected, you’ll need to conduct a year-round ecological survey and obtain an environmental permit (process: 8–14 weeks).

Tip: Wait for the municipal Species Management Plan (SMP). Once it’s ready, the process for animal-friendly insulation through the municipality will take just 15 business days.

Want to know more?

View our customized advice or contact us at energietransitie@wassenaar.nl.