Guarantee paperwork can look dense, but the principles are straightforward. Here is what is usually covered, for how long, and what to check.
A guarantee is only useful if you understand it, and most homeowners file it away unread at handover. This guide sets out the structure common to most window and door guarantees, so you know what protection you actually have.
Terms vary between manufacturers and installers, so always check your specific documentation, but the framework below covers what to expect and what questions to ask if anything is unclear.
| Element | Typical guarantee period |
|---|---|
| Aluminium frame and finish | 10–20 years, manufacturer dependent |
| Residence Collection frame | 10 years |
| Sealed glass units against internal misting | 10 years |
| Hardware, locks and hinges | 2–5 years |
| Installation workmanship | 10 years, insurance-backed where offered |
These figures are typical guide ranges; always confirm the exact terms in your own documentation, since they vary by product range and installer.
An insurance-backed guarantee protects you if the installing company ceases trading during the guarantee period, since the cover sits with a third-party insurer rather than solely with the business. For a purchase of this size, it is worth asking specifically whether this is included.
If you notice a genuine fault, such as misting between panes of glass, a failed seal or a hardware defect, contact your installer with your guarantee reference, a description of the issue, and photographs where possible. Most legitimate issues are resolved with a straightforward repair or replacement visit.
Questions
If your question isn’t here, we would rather talk it through properly than guess.
Ask us directlyVisit the Knowledge CentreKeep reading
Flagship guide · 9 min read
New windows and doors are one of the more disruptive home improvements you can commission, but only briefly. This guide sets out exactly what happens, in what order, so there are no surprises.
Installation · 3 min read
The technical survey is where an approximate quotation becomes a fixed, accurate order. Here is what a surveyor actually checks, and why.
Installation · 3 min read
A small amount of preparation the day before installation makes the whole process faster, cleaner and less stressful.
Installation · 3 min read
Timings depend on scope, property type and product, but most projects follow a predictable pattern that is far shorter than people expect.
Build your own collection of expert advice as you plan your project.
Wondering how this applies to your own home?
Share a photograph and we’ll turn this guidance into recommendations for your property.
Ready to understand the likely investment?
Start your personalised Project Investment Guide and see comparable completed projects.
Begin
Bring us your drawings, your site photographs or simply an idea. We will tell you what is possible, what it should cost and how long it will take.
