Step 1: Build a Shortlist Through Referrals
The most reliable source of a good roofer is a neighbour who has recently had roof work done and is happy with it. This gives you a direct account of how the contractor behaved — whether they turned up when they said, whether the quote matched the invoice, whether they left the site clean. Ask specifically about these things rather than just "were they good?"
NFRC membership is the most useful independent check. The National Federation of Roofing Contractors vets members for insurance, trading history, and work quality. Search at nfrc.co.uk using the contractor's name. Google reviews are useful for volume signal but individual reviews are easy to fake — look for patterns across multiple reviews rather than individual star ratings.
Step 2: Ask the Right Questions Before Booking a Survey
Before you invite anyone to survey your roof, three questions filter out the majority of unsuitable contractors: Do you have public liability insurance, and can you send me the current certificate? Are you NFRC registered? Can you provide two references from recent jobs in this area? A legitimate contractor answers all three immediately. A contractor who deflects or says they'll get back to you on any of them is worth removing from the shortlist.
Step 3: What to Look for in the Survey
A proper roof survey takes 30–60 minutes and requires the surveyor to access the roof — not just view from the ground or the loft hatch. They should assess: tile condition (cracked, slipped, nail-sick); felt condition (perished, torn, failed at laps); batten condition (rotten, undersized, incorrectly spaced); ridge and verge mortar; flashings and valleys; gutters and fascia. The written survey report should describe findings for each element with a recommendation and cost indication.
A surveyor who spends five minutes on the roof and immediately quotes for the maximum possible scope of work should be treated with caution. A good surveyor identifies what needs doing now, what can wait, and what is acceptable as-is. The honest answer is rarely "everything needs replacing".
Step 4: Comparing Quotes Properly
Never compare quotes by total price alone. The meaningful comparison is line by line: what tile or material is specified (manufacturer and product name), whether breathable membrane is included, whether felt and batten replacement is included, what the scaffold arrangement is, whether VAT is included, and what the guarantee covers and for how long. A quote that excludes scaffold, excludes membrane replacement, and uses unnamed "equivalent" materials will always look cheaper — and will produce an inferior result.
A price significantly below the other quotes almost always reflects something missing rather than genuine efficiency. Ask directly: "What would you include to match this lower quote?" The answer will reveal the difference.
Step 5: The Contract and Payment Terms
Every piece of agreed work should be in writing before work starts. The document should specify: scope, materials with manufacturer references, programme, payment schedule, and guarantee terms. A deposit of 10–25% is reasonable for large jobs. Full payment before work starts is not reasonable and gives you no recourse if the work is disputed. Pay by bank transfer rather than cash — it creates a verifiable record.
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