Mainstream Windows

Book your 2018 Conservatory or Orangery and get a Triple Glazed Upgrade

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Conservatory/Conservatories and UPVC Windows Specialist in Birmingham

Evesham, Knowle, Stratford upon avon, Solihull, Bromsgrove & Henley in Arden

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 a FENSA-registered company and established business in Birmingham since 1988, we understand that conservatories are a valuable lifestyle addition to any home. We manufacturer and install the right conservatory to suit your lifestyle, home and budget. Our quality conservatories can give many years of enjoyment and enhance your living space in a reception room, play room or office. Moreover, our conservatories come with a ten-year fully comprehensive and no-quibble guarantee, backed by a market-leading insurance company for your complete peace of mind. Our products come in Modern and Victorian styles both thermally efficient and easy to clean. They offer natural light and create a luxurious living area. Victorian styles incorporate a central ridge with three, or occasionally five, segments. Our installations comply with all current Building Regulations so if you are in Birmingham or the surrounding areas and planning a new conservatory we can discuss your plans.

Our Services


Are you thinking of having new windowpanes?


Mainstream Windows is a leading supplier of doors.


Conservatories are a cost-effective and valuable lifestyle choice.


We supply and install top quality orangeries.

What Our Customers Say

First Class

"I thought I'd drop you a line and say how pleased I am with the led work, I am glad I left the designing of the led work entirely to you. It's absolutely first class."

- Vimal Sharma

Very Impressed

"I wish to confirm that I was very impressed with your fitters both Dave and Graham who were so professional with the installation and I was very pleased with their work Thank you. Please kindly pass my thanks and appreciation to them both."

- Sikander

Thank You

"I'm writing to you to thank you for the work carried out on the 4m April 2012 at the above address. I would personally like to thank the two gentlemen that carried out the work, who were in my opinion second to none and pulled out all the stops in order to produce an extremely high standard of work and when finished, left the property spotless. Because of this, I have no hesitation in recommending your company."

- Mr C. Szkoda - Warstock

We Are Delighted

"I am writing to thank you not only for our lovely conservatory but also for dealing with the modifications and amendments which we asked for without fuss. We are delighted with the end product and would recommend your workmen who were friendly and carried out the work well"

- Stan Ditton - Moseley


  • Order ANY 5 A rated windows or more and get 75% OFF our doors
  • 50% OFF triple glazed windows
  • Order a Conservatory or Orangery & get a back door FREE!

UPVC Doors & Window Installers

We offer a stunning range of UPVC doors and UPVC windows at affordable prices in Birmingham, Evesham, Knowle, Stratford upon Avon, Solihull, Bromsgrove & Henley in Arden. Our range of products can bring warmth and comfort to your property.

Double Glazing Company in Birmingham

Mainstream are more than a double glazing company for Birmingham. We offer a cost effective solutions to transform your home by adding double glazed windows and doors. As well as giving a fabulous new look to your property, our range of double glazing can add value and save money on heating bills. Whether you need double glazing for windows or new doors, we have something in our extensive product range to match your home and budget. We have a wealth of experience in the industry, and are totally customer focused.

Over 20 Years Experience


For over 20 years, our award-winning FENSA regulated firm has successfully manufactured and supplied windows, doors and conservatories to our clients.

Contact Us

For more information on any of our services fill out our contact form or call us today on 0121 430 9150.

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