We are a family owned business providing double glazed windows and doors in Birmingham and the West Midlands. We believe that in order for us to provide you with the best solution for the project that you are interested in, we need to firstly fully understand how the product will be used. As well as giving a fabulous new look to any property, our huge range of double glazing doors/windows can add value to your property and save money on heating bills.

Mainstream Double Glazing Products

uPVC Windows

If you are considering giving your home the update it needs, Profile 22 – suppliers to West Midlands firm Mainstream windows – have created a leading window and door system based on an intelligent design, elegant aesthetics and a commitment to deliver exceptional performance.

Profile 22’s Optima collection has been created with the highest standards in PVC-U windows and doors in mind.

“Optima is unique,” “No other windows, doors or conservatories are produced in the same way and no others have the same great features.

Aluminium Windows

If you are interested in giving your home the improvement it needs, our supplier Origin Windows have created OW-80, an aluminium flush casement window system that could give your home exactly the lift you are looking for.

Also in this range is the Origin slimline OW70 which offers homeowners looking for a reduced less visible aluminium profile just the product to create a sleek contemporary look. The slimline range creates this different visual appearance and comes complete with a leading guarantee of up to 20 years.


Conservatories are a cost-effective and valuable lifestyle addition to any home, creating extra space for use all year round. As a successful Birmingham based manufacturer and installer of upvc windows, doors and conservatories for over 20 years, Mainstream Windows can provide you with the right conservatory design to suit your lifestyle, home and budget.

School Window

I would like to say thank you on behalf of everyone at Colmore Junior School, for fitting our replacement windows. I have been extremely impressed by the commitment shown by everyone at Mainstream Windows, from our initial enquiry; all the way through consultation and planning; finally resulting in a very professional team of fitters providing us with the replacement windows our school has needed for a long time.

The school site was left clean and tidy (inside and out) after each day, with your fitters working hard to complete the job ahead of schedule.

I would have no hesitation in recommending Mainstream Windows, and look forward to working with you on future projects.

Commercial Windows

If you are looking to optimise this environment, West Midlands firm Mainstream Windows may be able to help you.

Specialists in schools and commercial premises, Mainstream Windows offer a variety of aluminium commercial window solutions based on functionality, security, practicality and aesthetic appeal.

“Mainstream Windows offers a full supply and installation service to commercial organisations seeking new aluminium commercial casement windows, doors, shopfronts and curtain walling systems,” said a spokesperson.


  • uPVC & Aluminium Doors

Our UPVC doors are manufactured in our own workshop ensuring the standard of production and attention to detail is all our own.

  • Bifold Doors

Bifold Doors, sometimes called concertina / folding and sliding doors, are a fantastic alternative to French Doors or patio doors as they create a wider opening and add a new dimension to your living space.

  • Garage Doors

Garage doors are often overlooked when it comes to home improvements, yet they represent a tremendous opportunity to upgrade security and add value to any property.

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January, 2022



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