How to Vet a Roofline Installer: The Checks That Actually Matter
Roofline work is one of the easier home-improvement categories for an unqualified or uninsured tradesperson to take on convincingly - the visible finish can look fine from the ground for a while even if the underlying work is poor. A few concrete checks separate a competent installer from a risky one.
Companies House registration
A registered limited company has a filing history you can actually check - incorporation date, filed accounts, registered address. This doesn’t guarantee quality, but a business that’s been trading and filing accounts for several years is a materially different risk than one with no verifiable history at all.
Insurance
Ask specifically for proof of public liability insurance and, ideally, employer’s liability if they have staff. A legitimate installer will produce this without hesitation; reluctance or vague answers are a real warning sign.
Trade body membership
FENSA, Assure/Certass, or membership of a recognised trade association isn’t compulsory for roofline work the way it is for some window installations, but it’s a useful additional signal - it usually means a level of vetting and a complaints process that a completely unaffiliated trader doesn’t have.
Guarantees, in writing
A written guarantee on both materials and workmanship - not just a verbal assurance - should specify what’s covered and for how long. Ten years is a common benchmark for installation work; anything offered only verbally isn’t worth much if something does go wrong later.
References and reviews on an independent platform
Reviews on a platform the installer doesn’t control are harder to fake and easier to verify than testimonials on their own website. A pattern of similar, recent, specific reviews mentioning roofline work is more useful than a handful of generic five-star ratings.
How they quote
A detailed, itemised quote - materials, labour, access/scaffolding, disposal - that’s willing to be put in writing is a good sign (see our red flags guide). Pressure to decide on the spot or a quote dramatically below others without an obvious reason are the classic warning signs.
A simple pre-work checklist
- Company registered and trading history checkable
- Public liability insurance confirmed, ideally seen not just claimed
- Written guarantee on materials and workmanship
- Independent reviews, not just testimonials on their own site
- Itemised written quote, no pressure to decide immediately
Frequently asked questions
Why does Companies House registration matter for an installer?
A registered company has a checkable filing history - incorporation date and filed accounts - which is a materially different risk than a business with no verifiable history at all.
What insurance should a roofline installer have?
Public liability insurance as a minimum, covering damage to your property or injury to others during the work, and ideally employer's liability if they have staff.
Are testimonials on an installer's own website reliable?
Less reliable than reviews on an independent platform the installer doesn't control, which are harder to fake and easier to verify.
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