Anthracite grey UPVC windows on a Georgian Lincolnshire townhouse with climbing wisteria
UPVC Windows & Doors

Practical,
clean and durable.

Modern UPVC needn't look like UPVC. A+ rated, slim-frame, properly fitted, and available in finishes that sit beautifully against Lincolnshire stone, brick and render.

20+
Years
80+
5★ reviews
10yr
Guarantee
20+
Years installing
80+
5★ Google reviews
100%
Independent · Family run
Certass
Accredited
The practical case

Low maintenance.
High specification.

UPVC is the right choice when you want a quiet, reliable, low-maintenance window that performs for decades. It doesn't warp, rot or need repainting, and the modern slimline systems we fit look nothing like the chunky frames of twenty years ago.

We specify 28mm A+ rated double glazing as standard, or 36mm triple glazing for rooms that need exceptional thermal and acoustic performance.

Colour options have moved on too: alongside crisp white, we install anthracite, heritage greys, English oak and a black-on-white that suits period townhouses particularly well.

We're a working installer, not a sales team. There's no commission, no upsell, and no scripted pitch, just a measured, written quotation for the right window for your home.

What you can expect
  • 01 /

    A+ rated energy

    Industry-leading thermal performance, soft-coat low-E argon-filled units.

  • 02 /

    Slim modern sightlines

    More glass, less frame, a clean contemporary look.

  • 03 /

    Double or triple glazed

    28mm or 36mm units, specified room by room for the right balance.

  • 04 /

    Secure multi-point locking

    Independently tested to the latest PAS24 security standard.

  • 05 /

    Choice of colours & finishes

    Smooth, woodgrain, foiled, including dual colour inside / outside.

  • 06 /

    Cleanly fitted reveals

    Hand-finished trim, silicone in matching colours, no foam left showing.

Case study

A complete refresh,
finished in white.

01 /Stamford, Lincolnshire

Bungalow renewal

This Stamford bungalow was updated with crisp white UPVC windows and a matching entrance door, replacing tired original frames while keeping the property's warm, familiar character. The bay window brings light into the sitting room, and the clean, hand-finished reveals sit neatly against the brickwork: no visible foam, no rough edges, just a tidy installation ready for decades of quiet performance.

What customers say

uPVC installs across Stamford, Bourne, Rutland & Peterborough

Google
5.0
80+ five-star Google reviews
Google
So pleased we went with AJ Glass & Glazing to replace all 16 of our windows. Recommended by our neighbour. Quality of workmanship and attention to detail has been excellent. Competitively priced and completed in 5 days.
Graham Martin
Google review
Google
AJ has done a fantastic job on our windows, improved the house massively. Brightened it up from dull rotten wooden windows to bright and open UPVC – the arch window being the centre piece has turned out beautifully.
Kereva Craggs
Google review
Google
Had a great experience with AJ's. They installed new windows and doors throughout my whole house. Very reliable, incredibly fast, but you can tell they didn't cut corners – the quality of work is very high.
Louise Duke
Google review
Google
We had our doors and windows replaced through AJ. Very patient and accommodating before placing our order. Always punctual, professional and friendly. Everywhere was always left tidy.
Sammie Woodbine
Google review
Next step

A proper, written quotation.

No high-pressure sales visits. Just measurements, options and a clear price across Stamford, Bourne, Peterborough and Rutland.