How to choose a roofer: quote checks and warning signs

Roofing quotes are difficult to compare when one is a single total, another lists materials but not access, and a third recommends a completely different job. The answer is not to pick the longest document or the lowest number. Put every contractor against the same checks and compare the work they are actually proposing.

Citizens Advice recommends getting written quotes and checking exactly what is included. TrustMark also advises homeowners to obtain clear, detailed quotations and use a written agreement. Those principles are especially useful for roofing because much of the defect is out of sight and unexpected work can appear after a covering is opened.

Begin with the diagnosis

Ask the contractor to explain what is wrong, where it is and how they established the cause. A ceiling stain alone is not a diagnosis. Useful evidence includes photographs of the covering and details, observations from the loft, moisture patterns, the condition of surrounding materials and the route water is likely to follow.

You should be able to connect the proposed work to the defect. Replacing a flashing should address a fault at that junction. Re-covering a flat roof should be supported by evidence that the problem is broader than one outlet or split. A full re-roof should come with an explanation of why the existing system cannot receive a dependable repair.

If two roofers disagree, do not ask only which one is cheaper. Ask each what evidence would change their recommendation. The contractor who can discuss limits and alternatives is often giving you more useful information than the one offering absolute certainty from the pavement.

What a written roofing quote should contain

A quote is stronger when it describes the job in enough detail that another person could understand the intended result. Citizens Advice distinguishes a quote from an estimate: a quote is an agreed price for the stated work, while an estimate is an approximate indication that may change. Make sure the document uses the right term and explains any assumptions.

• The roof area or exact locations included.
• Removal, preparation and repair of supporting layers.
• Material names, profiles, colours and relevant manufacturer details.
• Leadwork, valleys, ridges, verges, outlets, gutters and edge trims.
• Scaffolding, towers, permits or other access arrangements.
• Protection from rain while the roof is open.
• Waste removal and any making-good.
• Start assumptions, expected sequence and payment stages.
• How hidden defects and variations will be photographed and approved.
• The documents, guarantees and certificates supplied at handover.

The list will vary with the job, but vague phrases such as "repair roof as necessary" create avoidable disputes. Ask for quantities or boundaries where practical. On a repair, that might be a defined group of slates and a named flashing. On a re-roof, it should describe the complete build-up and details.

Check the business and the people doing the work

Confirm the trading name, address, contact details and who will carry out the job. If the quote comes from a limited company, check the company details match the document. If subcontractors will attend, ask who supervises them and who remains responsible for the contract.

Ask for current insurance details appropriate to the work and verify them where the project warrants it. Insurance does not prove workmanship, but the absence of clear information is a reason to pause. Trade memberships and manufacturer approvals should also be checked with the issuing organisation rather than accepted from a logo alone.

Reviews are more useful when they describe the type of job, communication and how a problem was handled. Read recent and older feedback across more than one source. A perfect headline score tells you less than detailed comments tied to real roofing work. You can see the site's published customer feedback on the reviews page, then follow the source links provided there.

Compare payment terms before paying a deposit

Deposits and staged payments should be proportionate to the project and written into the agreement. Ask what the deposit secures, when materials are ordered and which milestone releases each payment. Avoid paying the full amount before work begins.

Use a traceable payment method and obtain receipts. Be cautious if the trading name on the bank account is unexplained, if cash is demanded without paperwork or if the price changes because you will not pay immediately. Genuine material or access costs can be discussed without pressure.

Agree that variations require photographs, a description, a price and your written approval before additional work continues. If immediate work is genuinely necessary to remove a safety risk or keep the property temporarily weather-tight, limit it to that make-safe work and record the reason and cost as soon as practicable.

Warning signs worth slowing down for

• An uninvited caller says urgent work must begin immediately.
• The scope grows dramatically without photographs or explanation.
• Only a verbal total is offered.
• Business, insurance or membership details cannot be checked.
• A large payment is demanded before materials or access are arranged.
• You are discouraged from obtaining another opinion.
• The contractor will not explain who handles approvals or Building Regulations.
• Guarantees are promised without written terms, exclusions or an issuer.

A warning sign is a reason to ask more questions, not proof of wrongdoing. Emergencies can require quick decisions, and small repairs may have simpler paperwork than a re-roof. The standard should still be clear identity, an understandable scope and a record of the agreement.

Ask how access and safety are being handled

Roofing involves work at height. The contractor should decide on safe access and edge protection rather than asking the homeowner to provide an unsuitable ladder. Access costs can materially change a quote, so make sure competing prices allow for a comparable method.

Discuss protection for paths, conservatories, neighbouring property and vehicles. Ask where materials and waste will be stored. If scaffolding affects a pavement or road, permits may be needed. A low quote that omits necessary access is not directly comparable with one that includes it.

Check the proposed materials and guarantees

The quote should identify materials accurately enough to verify suitability and care requirements. Ask whether product guarantees require installation by an approved contractor, registration, maintenance or supporting documents. A material guarantee and a workmanship guarantee are different.

Read the terms before treating the headline period as part of the value. Check who provides the guarantee, what it covers, exclusions, transfer conditions and what happens if the original contractor stops trading. Do not accept a verbal promise that is broader than the written terms.

Use the same questions for every quote

Create a one-page comparison with diagnosis, scope, access, materials, details, approvals, payment, variations and handover. Mark missing information rather than guessing it is included. This often explains why totals differ and lets each roofer clarify the proposal before you decide.

Our guide to repair versus replacement helps when the recommended scopes differ. The gallery shows examples of completed work, and the about page explains the business. Those pages support a decision, but your own written quote still needs to stand on its own.

Before you sign

Read the final quote and terms together. Confirm the property, scope, total, payment schedule, proposed dates, responsibility for permissions, variation process and handover documents. Check the cancellation terms before agreeing: depending on where and how the contract is made, you may have a 14-day cancellation period. If you ask for work to start during that period, you may have to pay for work completed before cancellation. Keep the accepted version and every later change in one place. For larger work, use the planning permission and Building Regulations guide to check how responsibility for approvals is recorded.

To request a written roofing assessment across Liverpool, Wirral, Chester, Cheshire or North Wales, use the contact page. Provide photographs and a short history of the problem so the first conversation starts with the fault rather than a generic price.