John Duff (joiners) Ltd.
Window & double glazing company registered in Dumbarton, Glasgow
Registered address
30 LIME ROAD, BROADMEADOW INDUSTRIAL ESTATE, Dumbarton G82 2RP
✓ Active on Companies House
Companies House numberSC246321
IncorporatedMarch 2003
23 years on the register
23 years on the register
Company typePrivate Limited Company
Trade (SIC 43320)Joinery installation (windows, doors & frames)
Accounts on fileFull accounts, small-company exemption · last filed March 2025 · next due December 2026
Listed from the public Companies House register, not an endorsement. Quote requests go to FENSA or Certass registered installers covering your postcode, not necessarily this company. Accounts filing category reflects company size under Companies House rules, not service quality. Map location is approximate, based on the registered postcode.
Before you book John Duff (joiners) Ltd.
This page confirms the company is on the Companies House register. It does not confirm FENSA or Certass registration, insurance, or trading status. Check those yourself first.
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Is John Duff (joiners) Ltd. FENSA or Certass registered?
This directory does not confirm registration. Window and door installers self-certify their work against Building Regulations through a Competent Person Scheme — mainly FENSA or Certass — so check the company name or postcode (G82 2RP) directly on the FENSA or Certass website before booking, and ask to see the certificate number.
Do uPVC windows need any maintenance?
Not much, but not none. Wipe the frames a few times a year, lubricate hinges and locks annually, and keep the drainage channels along the bottom of the frame clear so water can't pool and find its way inside. There is no statutory annual service like a boiler needs.
Does a listing here mean John Duff (joiners) Ltd. is recommended?
No. Companies appear in this directory because they are on the Companies House register under a window/joinery installation trade code. A listing is not vetting, endorsement, or a guarantee that the company is trading or FENSA/Certass registered.
How many window and glazing companies are there in Glasgow?
This directory holds 903 active window and glazing businesses across 48 towns in Glasgow, all from the Companies House register. Dumbarton accounts for 17, among the county's busiest. About 45% of Glasgow's registered window and glazing firms were incorporated in the last three years, so weigh incorporation date and FENSA/Certass registration, not just company age.
Other window & glazing companies in Dumbarton
Acaal Ltd
Aitchison Contracts Ltd
Bespoke Joinery Construction Ltd
Clydecraft Ltd
D M D Joiners Limited
Dcf Joiners & Building Services Limited
Defenster Ltd
Defenster Systems Limited
Ideal Media Walls Ltd
Iq Joinery Ltd