Alex Constantinescu

ClayTec market entry, NL

None of the seven craftsmen I interviewed had heard of the brand, and none would buy anything that isn't stocked within about 30 km. So the plan starts with distributors and word of mouth, not ads.

Funnel chart narrowing 46,000 Dutch plasterers and carpenters to 33,282 addressable firms in four filters
Funnel chart narrowing 46,000 Dutch plasterers and carpenters to 33,282 addressable firms in four filters
  • 46,000plasterers and carpenters in the KVK registry
  • 33,282addressable firms after four filters
  • 7in-depth interviews with Dutch craftsmen
  • 7/7had never heard of the brand

Context

ClayTec makes clay plasters, clay boards and natural wall finishes in Germany. It wanted more Dutch craftsmen using them. I ran the project as a consulting engagement from October to December 2025: one researcher, a real company and a deliverable a sales team could act on.

The question

Is there a market worth entering, how big is it, and which craftsmen should ClayTec win first?

Approach

Sizing. I built a four-stage funnel from public data: KVK registry codes, CBS statistics on construction workers, and building permits across the twelve provinces.

  1. All plasterers and carpenters in the KVK registry: about 46,000 firms.
  2. Remove trade-incompatible firms (industrial, B2B-only).
  3. Remove firms without residential or renovation work.
  4. Remove the late-adopter tail, using published innovation-adoption rates.

That leaves 33,282 addressable firms.

Segmentation. Four segments, named after how they decide:

  • Practical Builders, the largest group: they follow what clients ask for and what peers recommend.
  • Traditionalists: loyal to proven brands, hard to win, hard to lose.
  • Eco-Driven Specialists: small, already open to clay, valuable as references.
  • Industrial Contractors: excluded, because the product and buying process don’t fit.

Validation. Seven in-depth interviews with plasterers and carpenters around Amsterdam and South Holland, all using the same guide (background, purchasing, sustainability, brand awareness, outlook). I then mapped a five-stage journey (awareness, consideration, purchase, retention, advocacy) for the two main segments.

What I found

  1. Zero awareness. None of the seven had heard of ClayTec.
  2. Word of mouth runs the market. Craftsmen find both clients and materials through peers.
  3. Availability beats everything. If it isn’t at a merchant within about 30 km, it doesn’t exist.
  4. Sustainability is client-led. Craftsmen adopt eco materials when clients ask. Around a quarter of their clients now mention it, up from almost none five years ago.
  5. Price is the first objection, and it usually comes from the client, not the craftsman. Clay can cost about twice as much as the conventional option.

Recommendation

A phased entry, led by distribution:

  • 0–6 months. Partner with 5–10 regional merchants in North and South Holland. Produce Dutch-language application videos. Run an early-adopter programme with 50 Practical Builder projects.
  • 6–12 months. Hands-on workshops in Amsterdam and Rotterdam, 20–30 documented projects, and 15–20 merchants.
  • 12–24 months. A proof programme with performance guarantees for Traditionalists, an architect spec-in programme, and craftsman referrals.

Sequence: Practical Builders for volume, Eco-Driven Specialists for proof, Traditionalists for scale.

Limits

Seven interviews show direction, not statistical proof. Segment sizes rest on proxy variables (registry codes, regional permit shares, adoption rates), and I documented each assumption so the sizing can be updated. Per-segment counts and pricing findings are left out here because they are confidential.