- Source checked
- 26 Jun 2026
Public evidence profile
Knowles Glassworks
Credentials & registries
2 credentials shown
Based on rating, review volume, independent sources and credential evidence. Evidence context, not a guarantee of workmanship.
Credentials and associations
2Credentials and memberships
These credentials and memberships are attributed to named public sources. Check the source before relying on them.
- Source checked
- 18 Mar 2026
Reviews · public evidence
What customers say
These reviews are published independently on the named public source below, not testimonials this business chose to show. We bring them together and link each one back to where it appeared, so you can open the source and read it yourself.
5.0out of 5
How Checkatrade customers rate them (out of 5)
Reliability4.9
Communication5.0
Quality of work5.0
Where these reviews are published
- Checkatrade227 reviews · 5.0 avg
Detailed reviews
These are the individual reviews we hold for Knowles Glassworks, including the highlights above. The 227 headline total is the review volume reported across public review sources.
Our internal stained glass door got badly damaged. I took the door to Sharon to assess and she suggested some additions to the stained glass to add more strength. We are extremely pleased with the result and very grateful for the work that she did.
We wanted to retain our stained glass in the front door but did not know it could be done. Our old door was 100 years old, so we did not expect it could. Then we found Knowles who were very professional and have completed the most amazing installation of the old glass….cleaned, sparkling and thoroughly renewed….into a substantial and robust new door. We are thrilled with the result. They were careful to carry out our wishes and the cost was reasonable. The new door has transformed our entrance from inside and out.
Sources
3 named public sourcesWhere this information comes from
Everything on this page is drawn from named public sources. Where a source provides a public link, you can open the original and dig deeper.
Review sources
Registers and membership directories
Check dates vary by source. Where we hold a date, the check shows it.
About
Glass in Horley, Surrey.
Services they list
Aluminium Doors InstallationAluminium Windows InstallationBay Windows InstallationComposite Front Doors InstallationDouble Glazing InstallationFrench Doors InstallationFrosted WindowsGlass ReplacementGlass RestorationGlazierMisted Double GlazingPatio Doors Installation
Listed on public sources or the business's own website; check directly that they cover your job before you book.
Areas served
HorleySurrey
The areas they list covering on a public directory; confirm they cover your address before you book.
Your own checks
What to check before you hire
Worth checking yourself
Always confirm credentials and quotes with the business directly before hiring.
Verify at the sourceCheck them yourself
Replacement windows and doors must meet building regulations. FENSA-registered installers are Government-authorised to self-certify and register the work with your council - check they're on the FENSA register.
Check the FENSA registerConfirm they cover your area and can actually come out in your timeframe before anything else.
Read recent reviews for reliability and turning up on time, not only the quality of the work.
Agree the call-out fee up front, and be wary of large upfront deposits for an emergency job.
Want an extra legitimacy check? Run the Cowboy Checker on Knowles Glassworks before you contact them.
Run Cowboy Checker →Good to know
Common questions about Knowles Glassworks
Is Knowles Glassworks a legitimate business?
Knowles Glassworks has 227 independent public reviews, rated 5 out of 5. This is independent public evidence gathered from named public sources (no ads, no paid placement), not a guarantee of workmanship. If anything here is out of date, the business can request a correction.
What do customers say about Knowles Glassworks?
Knowles Glassworks has 227 public reviews, averaging 5 out of 5. You can read the individual reviews and where each came from in the reviews section above.
How is Knowles Glassworks rated on reliability and quality?
On Checkatrade, customers rate Knowles Glassworks by category: Reliability 4.9 out of 5, Communication 5.0 out of 5, Quality of work 5.0 out of 5. These are per-category scores from real published reviews. They show where Knowles Glassworks is strongest, not just the overall average.
How do I know Knowles Glassworks' reviews are genuine?
Knowles Glassworks' 227 public reviews come from a named public review source, and MyTrustedTraders links every one back to where it was published, so you can open the source and read them yourself rather than trusting a single curated page. MyTrustedTraders brings this public evidence together with no ads and no paid placement: we show where every review came from rather than selling rankings, so you can weigh the evidence for yourself.
Is Knowles Glassworks qualified and accredited?
We hold 2 independently sourced credentials for Knowles Glassworks, including TrustMark (Government-endorsed), CERTASS. Each is attributed to the body that issued it in the credentials section. For example, TrustMark (Government-endorsed) is the government-endorsed quality scheme for work carried out in and around the home.
What does Knowles Glassworks specialise in?
Knowles Glassworks lists specialist services including Aluminium Doors Installation, Aluminium Windows Installation, Bay Windows Installation, Composite Front Doors Installation, Double Glazing Installation, French Doors Installation. If your job is one of these, look for it in their listed services or ask them to confirm for your project.