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Example report: Underfloor heating — dry construction (Fermacell)

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Key finding: in QuoteChecker's independent review, this Underfloor heating — dry construction (Fermacell) quote scored 6.1/10, with 2 risks and 4 points of attention identified; our recommendation to the client: Renegotiate first.

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Underfloor heating — dry construction (Fermacell)
Example
Client
[Private client]
Provider
[Installation company]
Report
2025

Summary

[Installation company] provides a well-specified quote for dry-construction underfloor heating in Fermacell for € 2.790 incl. VAT, with a strong Google reputation and recognised professional competence. There are, however, points of attention: the Chamber of Commerce (KVK) number is missing, the liability exclusion for milling work is too broad, the text contains an unclear € 500 item that does not appear in the specification table, and the 18-month warranty period is shorter than the industry standard. Have these points clarified and recorded before signing.

4 positive 4 points of attention 2 risk
6.1 out of 10
Average score
⚠️ Our recommendation: Renegotiate first

The quote from [Installation company] is transparent on price and the company has an excellent reputation, but there are two risk findings you must address before signing. The most serious risk is the broad liability exclusion for drilling and milling work: ask [Installation company] to limit it and to confirm that a KLIC (utility-line) notification will be filed. In addition, the unclear € 500 item for 'cement filler' should be clarified in writing — this could mean the actual price is € 3.290 instead of € 2.790. Also resolve the missing Chamber of Commerce number and the shorter 18-month warranty period before agreeing.

Cost overview

ItemAmount
Installation materials € 350,00
Labour underfloor heating € 1.210,00
Smart manifold 1 loop with Wilo pump € 410,27
Fermacell 2E22 board 150x50 (10 m²) € 423,50
5-layer pipe (60 metres) € 66,60
Danfoss by-pass valve € 175,00
Fermacell filler (10 units) € 79,50
Floor insulation (10 m²) € 25,40
Fermacell edge strips € 50,00
Subtotal excl. VAT € 2.306,01
VAT 21% € 484,26
Total quote € 2.790,27
Total quote amount (indicative)€ 2.790

Category scores

Price transparency
8
Quote completeness
6
Provider reputation
9
Red flags
5
Warranty & liability
5
Hidden costs risk
5
Delivery terms
6
Price market conformity
7
Contractual risk
5
Scope completeness
5

Findings

Detailed cost breakdown
The quote contains an itemised table with quantities, unit prices excl. VAT, VAT amounts and totals per item. This gives good insight into how the price is built up.
Recognised InstallQ installer
[Installation company] is affiliated with Techniek Nederland (the Dutch installation industry association) and is a recognised InstallQ installer. This means the company meets professional standards for installation work.
Strong Google reputation
4.8/5 based on 553 reviews — an above-average score for an installation company.
VAT specified separately
All items show the price excl. VAT, the VAT amount and the price incl. VAT. The 21% rate is stated explicitly.
Chamber of Commerce number missing
The KVK number is not in the quote. Check for yourself via kvk.nl whether [Installation company] in [Location] is registered and whether the address ([Address], [Location]) is correct.
Unclear € 500 item 'cement filler'
The quote text mentions 'Sealing channels with cement filler € 500,-' but this item does not appear in the specification table. Ask whether this is an extra item on top of the € 2.790 total or a duplicate mention.
No quote validity date
No date is given until which the quote remains valid. Ask about this — with rising material costs, the price may be revised if you agree later.
18-month warranty is shorter than the industry standard
[Installation company] gives an 18-month warranty on the installation. In the installation industry, 24 months is customary. Negotiate an extension to at least 24 months.
Liability exclusion for drilling and milling work
[Installation company] excludes liability for 'damage during drilling or milling work'. This means that if a water pipe, gas pipe or electrical installation is hit, you as the customer bear the repair costs. This is an unusually broad exclusion — have it amended or ask what precautions will be taken (e.g. a KLIC utility-line notification).
Fermacell boards an open item — price may come out higher
The Fermacell boards are settled based on the actual surface area. The quote assumes 10 m², but the project is '5-10 m²'. At 10 m² the item is already € 423,50 — any deviation will be adjusted on the invoice without a maximum.

Recommended questions for the provider

  1. 1.What is the Chamber of Commerce (KVK) number of [Installation company], and can you state the VAT identification number on the quote?
  2. 2.The quote mentions 'Sealing channels with cement filler € 500,-' in the text, but this does not appear in the specification table — is this an extra item on top of € 2.790 or is it already included?
  3. 3.Are you willing to limit the liability exclusion for drilling and milling work to damage demonstrably caused by insufficient information from the client (e.g. no KLIC notification available), and will you file a KLIC notification before starting?
  4. 4.Can you increase the warranty period from 18 to 24 months, in line with the common industry standard?
  5. 5.Until what date is this quote valid, and does the price still apply if the actual surface area comes out closer to 10 m²?
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