Free tool
Quote-Comparison Checklist
Different suppliers quote different specs for the same-sounding room. This is a printable list of everything to ask, with space to write three suppliers' answers side by side.
Print this, or fill it in on screen, then take it to every supplier you talk to — the same questions, asked the same way, so the answers are actually comparable.
Your details
Suppliers being compared
| What to compare | Supplier A | Supplier B | Supplier C |
|---|---|---|---|
Base / foundation type Concrete slab, screw piles or block-and-beam — this affects long-term stability and whether groundworks are included in the price. | |||
Wall build-up & insulation thickness Ask for the actual wall thickness and insulation material/thickness in mm, not just the word "insulated". Ask for a U-value if they have one. | |||
Glazing spec Single, double or triple glazed? What frame material (uPVC, aluminium, timber) and what glass thickness? | |||
Roof covering EPDM rubber, standing-seam metal, or felt — each has a different expected lifespan and maintenance need. | |||
First vs second fix electrics Is a socket/light circuit run from the house included (first fix) and fully fitted (second fix), or is that a separate job or cost? | |||
Plastered vs T&G internal finish Plastered-and-painted or tongue-and-groove board — these look, feel and cost differently to maintain. | |||
Delivery radius Is your postcode inside their standard coverage area, or does distance add a cost? | |||
Waste removal Is removing packaging and site waste included, or is that down to you? | |||
VAT treatment Is the quoted price inclusive or exclusive of VAT? Get this confirmed in writing before comparing totals. | |||
Guarantee terms What is actually covered — structure, cladding, glazing, workmanship? For how long? Is it insurance-backed or just the company’s own word? | |||
Deposit protection & staged payments How much deposit is asked for, is it protected, and what triggers each staged payment? | |||
Lead time From order to installation, what is the realistic lead time — and is that written into the contract or just a verbal estimate? |
Notes
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