Every reputable Chester roofer should offer a written guarantee on their work. But what does a 10-year roofing guarantee actually cover — and what doesn't it cover? This guide explains what to look for and what questions to ask before any Chester roofing work begins.
A Chester roofing guarantee has two parts: a workmanship guarantee covering installation defects (typically 10 years) and a manufacturer warranty covering materials (up to 20 years on GRP). Always insist on a written guarantee specifying duration, coverage and the contractor's details.
A roofing guarantee has two distinct components that are often conflated. A workmanship guarantee covers defects arising from the contractor's installation — incorrect flashings, inadequate mortar specification, missed nail-sick tiles, poor valley drainage. A material warranty covers premature failure of the materials themselves — GRP fibreglass manufacturer guarantees of 20 years, for example. Both apply on a Chester re-roof carried out by Chester Roofing Experts. A contractor who offers only a material warranty without a workmanship guarantee is offering significantly weaker protection.
NFRC members offer an insurance-backed guarantee that remains valid even if the contractor ceases trading — a protection that verbal or self-issued guarantees from non-registered Chester roofers cannot provide.
Source: National Federation of Roofing Contractors (NFRC)
A workmanship guarantee should cover: water ingress through any element of the roof that was repaired or replaced; failure of any flashing, ridge tile, hip tile or valley detail within the scope of the work; delamination or failure of any flat roof membrane installed; premature slippage of any tile or slate installed with new fixings. The guarantee should specify the name of the contractor, the property address, the work covered, the guarantee duration from the date of completion, and the process for making a claim.
A workmanship guarantee does not cover: storm damage that displaces tiles installed on an otherwise sound fixing — this is an insurable event, not a workmanship failure; damage arising from subsidence or structural movement of the building; failure of elements of the roof that were not within the scope of the original work; damage caused by third-party interference. A guarantee also does not extend the material's natural lifespan — a re-roofed Chester property guaranteed for 10 years will still need maintenance after that period.
Before agreeing to any Chester roofing work, ask: is the guarantee written? Does it specify the duration, the work covered, and the property address? Is it a workmanship guarantee or just a material warranty? What is the process for making a claim? Is the contractor NFRC registered — which provides a third-party conciliation route if a dispute arises? Chester Roofing Experts provide written 10-year workmanship guarantees on all work. Our NFRC membership provides an independent conciliation service if we cannot resolve any concern directly.
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A roofing guarantee is one of the most important things to understand before choosing a roofer in Chester, because the word ‘guarantee’ covers a wide range of promises of very different value. Knowing what a genuine guarantee includes — and what the weak ones quietly exclude — protects you from a cheap quote that turns out to be worth little.
A proper workmanship guarantee covers the quality of the work: if the installation fails because of how it was done — a flashing that leaks, tiles that were fixed badly, a flat roof seam that fails — the roofer puts it right at no cost for the guarantee period, typically ten years on quality work. Separately, the materials themselves usually carry manufacturer warranties — tiles, slate, membranes and roof windows often guaranteed for decades. What a guarantee does not cover is storm and accidental damage (an insurance matter), fair wear and tear over time, or problems caused by lack of maintenance.
The value of a guarantee depends entirely on the detail and on the firm behind it, and there are clear things to look for. First, is it in writing, with a stated period and clear terms? A verbal ‘we guarantee our work’ is worth little. Second, is it transferable if you sell the property? A transferable guarantee adds value to the home and signals a roofer confident in their work. Third — and most important — is the firm likely to be around to honour it? A ten-year guarantee from a business that vanishes in two years is meaningless.
This is where a genuine local Chester roofer has the edge over a fly-by-night trader or a distant national firm: an established local business with a reputation in the area, proper insurance and a track record is the one that will still be here, and reachable, if you ever need to call on the guarantee. When comparing quotes, weigh the guarantee as carefully as the price — a slightly higher quote with a solid, written, transferable guarantee from a firm that will last is almost always better value than a cheaper one whose guarantee you could never actually enforce.
For larger jobs, some Chester homeowners ask about insurance-backed guarantees, which add a layer of protection on top of the roofer’s own workmanship guarantee. An insurance-backed guarantee is underwritten by a third party, so that even if the roofing firm ceases trading, the guarantee can still be honoured through the insurer for the remaining period. For a major investment like a full re-roof, this can be worthwhile peace of mind.
Alongside the guarantee, proper insurance on the roofer matters throughout the job itself: public liability insurance covers any damage or injury while the work is underway, which protects you as the homeowner. When choosing a roofer for significant work in Chester, the full picture of protection is worth confirming — a written, transferable workmanship guarantee, manufacturer warranties on the materials, public liability insurance during the work, and for major jobs the option of insurance-backing. Together these turn a roofing job from a leap of faith into a properly protected investment, which is exactly what a job of this size and importance should be.
A workmanship guarantee covers defects arising from the contractor's installation work — incorrect flashings, poor ridge bedding, missed nail-sick tiles. A material warranty covers premature material failure. A full guarantee includes both.
No — a guarantee must be in writing to be enforceable. Always insist on a written guarantee specifying the duration, the work covered, and the contractor's details.
NFRC registration provides access to an independent conciliation service for disputes between NFRC member contractors and their customers. Chester Roofing Experts are NFRC registered.
No — storm damage that displaces tiles on an otherwise sound installation is an insurable event, not a workmanship failure. It is covered under your buildings insurance, not your roofing guarantee.
Ten years is the standard for quality Chester roofing contractors. Guarantees of less than 5 years on major work such as re-roofing are below industry standard.
Yes. All roofing work is covered by a written 10-year workmanship guarantee specifying the work, the property address and the guarantee duration from the completion date.
The guarantee becomes unenforceable against the contractor. NFRC membership provides some protection as the NFRC can assist with dispute resolution while the contractor is a member. Always check NFRC registration before any work begins.
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