Alexander Oastler (1946) Limited
Window & double glazing company registered in Dundee, Dundee
- Registered name
- Alexander Oastler (1946) Limited
- Address
- WHITEHALL HOUSE, 33, YEAMAN SHORE, Dundee DD1 4BJ
- Town
- Dundee
- County
- Dundee
- Companies House
- SC024913 · filing history
- Incorporated
- December 1946 — 79 years on the register
- Previously named
- Alexander Oastler Limited (until March 2008)
- Company type
- Private Limited Company
- Trade (SIC)
- Joinery installation (windows, doors & frames) (43320)
- Accounts on file
- Full 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.
Before you book Alexander Oastler (1946) Limited
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 Alexander Oastler (1946) Limited 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 (DD1 4BJ) 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.
Should I repair or replace my windows?
Repair makes sense for a failed seal (misted double glazing), a worn handle or hinge, or a damaged lock on an otherwise sound frame — usually a straightforward swap. Replacement is the better value once frames are warped, draughty, rotten (on timber) or past roughly 20 to 25 years old, or when several units across the house have failed. Ask the installer to price both where it's borderline.
What is a FENSA or Certass certificate and why does it matter?
It's proof the window or door installation meets Building Regulations (thermal performance, safety glazing, ventilation) without a separate council building control sign-off. Without one, selling the property can mean paying for retrospective building control inspection or indemnity insurance, so keep the certificate with your house documents.