with Yell


We cover Glasgow and the central belt

124 Redbrae Rd, Kirkintilloch, Glasgow, G66 2DD Directions

   Now closed Open today 08:00 - 18:00

Why Choose Us?

Quality Service
Extensive Knowledge
Quality Workmanship

Business overview

Window/door and glazing repair specialist covering Glasgow and the central belt. Upvc, aluminium repairs we now offer locksmith services to domestic and commercial customers

We believe that doors and windows are among your property’s most important features. They secure your home, allow light to enter, provide security and enhance the property’s aesthetics. As uPVC products are stronger and more durable than traditional doors and windows, they are a smart choice for most homes. Get in touch with us for our uPVC Window/ door installation, maintenance and glazing services.

Why choose WindowTec?

Over 28 years of experience

Competitive prices

Fitting and repair of all types of windows and doors

Highest quality of services

Free Local Quotations

Locksmith Services


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Products & Services

Garage door repairs

Door panels supplied & fitted

window/door leaks


Glass replacement

window and door locks repaired

Conservatory repairs and maintenance

Gutter repairs and cleaning

Handles ,hinges and letterboxes replaced

Commercial door repairs

uPVC window and door fitting and maintenance

Shopfront repairs

Security lock installation

Emergency glazing repairs

Window and door fitting and maintenance

Velux Window / Roof Window Repairs / Installs

Conservatory Composite Slate Roofs

Bi-fold Door Repairs / Installs

window and door locks replaced

Locksmith Services

Replacement glass

Door/ window fitting and maintenance

Boarding up Service

Commercial Glazing


Conservatory Repairs

Door Fitting

Door Repairs

Double Glazed Windows

Edwardian Windows

Emergency Glazing

Front Door Installation


Patio Doors

Replacement Doors

Toughened Glass

UPVC Doors

UPVC Windows

Window Companies

Window Repairs



  • Glass & Glazing Federation
  • National Federation Of Glaziers


Reliable professional Glaziers

Window tech-Recently supplied and installed 2 double glazed windows. The service I received was punctual, friendly and the job was first class. The cost was reasonable as well. I would use their services again and would recommend them to anyone looking for a professional glazier.
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Highly recommended

Excellent service from David Muldoon who, together with Lewis, replaced two misted windows, repaired a wonky double glazed door and a broken window handle. Great communication, from initial detailed quotation to scheduling of the work, including discussion about economical options for repairing / replacing a window lock which was no longer available on the market. I highly recommend this business, and would contact David again without hesitation if I required any further work.
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Highly recommend

Contacted Windowtec when I realised 2 of my windows were faulty and were coming out of the frame. The arranged an appointment to come assess the job really quickly and gave me a really reasonable quote for the work required. The windows are old and most of the parts out of production but they went to the effort of sourcing the parts I needed to repair the windows, make it so I could open and close them safely and save me the cost of replacing the full unit. Work was done quickly and tidily. Couldn’t recommend them enough!
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Great fitting experience!

After some process between our landlord, us, and various vendors we went ahead with WindowTec, and were not disappointed.

David organised everything properly for his installation team to the day and even hour when they would start, and after two days 10 windows were exchanged, another door adjusted, and they did also a proper clean-up.

A great and friendly team! Would definitely recommend!
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New front door

Excellent service again from windowtec fitted a new front door at my sons flat first class job and door is stunning.
11 Oct 2022
Thanks Andrew appreciate the great review yeah and the door looks amazing great choice
11 Oct 2022
Thanks Andrew appreciate the great review yeah and the door looks amazing great choice
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