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Klantwerf is in preparation. Prices shown are proposals; availability and terms are confirmed in each quotation.

For businesses buying enquiriesInsulation leads in the Netherlands

For insulation companies that want enquiries from homeowners with a defined insulation project in their service area.

Which enquiries you receive

The applicant wants floor, roof or cavity wall insulation fitted in an existing home. This is a project for which a quote is wanted, not general research. The insulation type and timing have been discussed by phone.

Enquiries from homeowners for floor, roof or cavity wall insulation.

What we check by phone

We have spoken to the applicant about the project, timing and agreed criteria. Stated budgets and measurements remain estimates unless specified otherwise.

  • Owner or authorised decision-maker
  • Insulation type and estimated area
  • Postcode and town
  • Project planned within 6 months
  • Interest in a quote confirmed

What the enquirer states

These details are the enquirer's own indications and are marked as such in the brief.

  • Insulation type: floor, roof, cavity wall or a combination
  • Estimated area in m²
  • Year or period of construction
  • Previous insulation work, where known
  • Access to the crawl space or loft

What you do not receive

  • General information requests without a defined project
  • Tenants without the owner's permission
  • Projects outside the agreed service area
  • Requests about subsidies only, with no interest in a quote

Please note: An ISDE subsidy may be available under the conditions in force at the time. Klantwerf does not assess eligibility or make any commitment; the installer and the applicant check this themselves.

Example enquiry brief

Example — fictional enquiry

Floor insulation in Amersfoort

Service area
Amersfoort
Checked
Project
Floor insulation
Checked
Applicant's role
Owner-occupier
Checked
Scope
Approximately 55 m²
Stated
Construction period
1960–1970
Stated
Crawl space height
To be confirmed
To be confirmed
Timing
Within 6 months
Checked

Service area

You choose postcodes or municipalities. We confirm per region whether enquiries are feasible; without that confirmation we promise no volume or delivery time.

Exclusive, and what that means

Klantwerf supplies the same enquiry to one buyer. The applicant may independently contact other providers.

No. You receive a qualified enquiry. Your business handles the quotation, sale and delivery of the work.

Something wrong with an enquiry?

Report incorrect details, a duplicate or a mismatch with the agreed criteria within 7 calendar days. Valid claims receive a replacement or credit after review. Terms are agreed before you start.

Valid reasons

  • Incorrect or non-existent contact
  • No genuine enquiry
  • Outside the agreed service area or criteria
  • Duplicate Klantwerf enquiry for the same project and the same buyer within 90 days

Not a valid reason

  • The enquirer later changes their mind
  • No contract or sale results from the enquiry

Is the enquirer unreachable after delivery? Report it with a short description of your attempts; we review each case individually. As a guideline: three reasonable attempts over two working days, and never continuing after an objection.

A valid report leads to a replacement or a credit, as agreed in advance. Not both. Media bookings follow their own cancellation terms.

Frequently asked questions

No. The area is stated by the applicant and marked as such. Surveying and measuring on site remain with you.

Launch sector

Windows & glazing

Enquiries for replacement window frames, insulating glazing or both.

Checked by phone

  • Owner or authorised decision-maker
  • Number of windows or glazing area
  • Material preference or advice need

Proposed price€55per qualified enquiry, excluding VAT · On request

See criteria and example Request a proposal
On request

Roofing

Enquiries for planned roof renovation, replacement or substantial repairs.

Checked by phone

  • Owner or authorised decision-maker
  • Roof type and work identified
  • Estimated roof area

Proposed price€59per qualified enquiry, excluding VAT · On request

See criteria and example Request a proposal

Further reading

Request a proposal for Insulation

We will check whether enquiries are feasible in your service area and send a proposal.