Dormer company checklist
A practical 25-point checklist you can run through with any quote, any sales meeting and any company website.
How to use this
One scan, three uses
This checklist works in three moments: when you read a quote, when you sit down with a salesperson, and when you compare two or three companies side by side. Treat each item as a yes/no question. If you cannot find a clear yes, that is a question to ask in writing.
The list
Quote and specification (1–8)
Checklist
Read the quote with these in mind
- 01Materials are named by brand or grade, not generically.
- 02Sizes (width, height, depth) are stated in millimetres.
- 03The R-value of the full insulation package is stated.
- 04Glazing type is specified (HR++, triple, sound-reducing).
- 05Frame material is named (PVC, timber, aluminium).
- 06Interior finish is described, not just labelled 'standard'.
- 07Exterior finish (cladding, paint, trim) is specified.
- 08Lead and flashing work is included in writing.
Process and planning (9–16)
Checklist
The how, who and when
- 01Crane and transport are included in the price.
- 02Permit handling is described: who does what.
- 03Lead time from order to install is stated.
- 04Install duration in days is stated.
- 05Payment is split across milestones, not 100% up front.
- 06Process for unexpected extra work is described.
- 07Handover protocol and snag list are explained.
- 08Aftercare contact and response time are clear.
Company and trust (17–25)
Checklist
The company behind the quote
- 01Warranty on structure is named separately.
- 02Warranty on waterproofing is named separately.
- 03Warranty on finish is named separately.
- 04Company has its own fitters or a fixed crew.
- 05References or photos of recent work are available.
- 06Reviews check out across multiple platforms.
- 07Terms and conditions are shared up front.
- 08Insurance certificate is available on request.
- 09The salesperson does not pressure you to sign today.
Read next
Related guides
Quick answers
Frequently asked questions
FAQ
Veelgestelde vragen
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01Is one checklist enough to pick a company?
It is a great starting point, but combine it with at least three written quotes and reading the warranty document in full.
02What if a company refuses to answer some of these questions?
That is a signal in itself. A solid company is used to these questions and will answer them in writing.
03Can I use this checklist for any country?
Most items are universal. Planning rules (permit, aesthetics) are specific to the Netherlands here, but the principle of checking those rules locally is the same everywhere.
Conclusie
A checklist is not a substitute for thinking, but it is a great tool for catching the things that are easy to miss in a fast sales meeting. Print this one, take it to your appointments and ask for the answers in writing.