Double Glazing Quote Checklist for Homeowners
Sixteen checks to run against any double glazing quote before you sign. If a box cannot be ticked in writing, treat it as missing.
Key takeaways
- A quote is only comparable when every line is defined in writing.
- Tick specification, scope, certification, guarantee and price, in that order.
- Any unticked box should be priced before you decide, not after.
- Three quotes against this checklist will find the real market price.
Use this list on every quote you receive. It takes about ten minutes per document and it will catch almost everything that turns into a dispute later. Anything you cannot tick in writing should be treated as excluded.
Specification
- Every window listed individually with size and location.
- Frame material, profile name and manufacturer stated.
- Glass specification and window energy rating stated.
- Opening and fixed windows identified.
- Hardware, restrictors and trickle vents specified.
- Safety glass locations confirmed, including doors and low panes.
Scope of work
- Removal of old windows included.
- Disposal of frames and glass included.
- Internal making good defined, including plaster and trim.
- External sealing and pointing included.
- Scaffolding included and arranged, or priced separately.
- Any structural work named and priced.
Paperwork and protection
- FENSA or CERTASS registration number and certificate confirmed.
- Guarantee length, cover and insurance backing confirmed.
- Public liability insurance confirmed.
- Complaints procedure and contact provided.
Commercial terms
- Fixed price with no provisional sums.
- VAT-inclusive total and rate shown.
- Payment schedule agreed, with a modest deposit.
- Lead time and installation dates stated.
- Price validity period confirmed.
- 14-day cancellation right acknowledged.
Using it across three quotes
Score each quote out of the checks above, then compare the totals of the quotes that scored well. In practice this narrows the decision immediately, because the cheapest quote is usually the one with the most unticked boxes.
The bottom line
Define the job, tick the sixteen points on every quote, and only then compare prices. It is the shortest route to a fair price and a quiet installation.
Frequently asked questions
Specification, scope, certification, guarantee and commercial terms. Every item should be written on the quote, not promised verbally.
Three, all for the same specification. The checklist makes the differences between them obvious.
Treat it as a warning sign. You cannot compare or audit a single total, and itemisation is standard practice on a purchase of this size.
Yes. Keep the signed contract, the quote, the VAT invoice, the FENSA certificate and the guarantee with your property documents.
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