About Capital Windows

Capital Windows are long established trade manufacturers of residential and commercial home improvement products. We supply to builders, home improvement firms, property companies and others a range of high quality aluminium systems, manufactured to exacting standards in our ultra modern 10,000 square foot factory in Uxbridge, Middlesex.

A one stop shop for fabricated aluminium windows and doors

With one of the largest product ranges in the area, we manufacture products from market leading names including AluK Systems and SAPA Building Systems.

This means we have the right range of products at competitive prices and excellent lead times enabling you to also offer the same wide product range to your own customers, all sourced from one experienced and dedicated trade manufacturer.

Capital Windows Celebrating 40 Years

40 Years experience in the Specialist Home Improvement Sector

We already supply many professional companies and individuals that choose to partner with us, benefitting from our many years experience, product, industry and technical knowledge.

Are you looking for an expert, trusted and reliable manufacturer of quality aluminium systems?  Capital Windows offer a wide range of window and door products from the major aluminium systems companies.

Aluminium products are presently enjoying year on year growth.  With aluminium gaining popularity amongst homeowners and the trade, it is important to source your products from a long established and trusted supplier.  We have focused our manufacturing on aluminium and are one of the longest established manufacturers.

Let us help you sell more aluminium

If you are interested in generating more aluminium enquiries and want to work with a dedicated supplier, here are just a few reasons how Capital Windows can help you as your trade manufacturing partner.

  • One stop shop for all your fabricated aluminium
  • A wide range of commercial and residential systems
  • A company with over three decades aluminium expertise
  • Competitive prices and lead times
  • A comprehensive product range from the leading names
  • A trusted supplier that will work in partnership with you.

You can review our accreditation and CE documents here.

Great To Deal With

The Elite Glazing Co Ltd

Elite Glazing have used Capital Windows for the last 10 years for all of our Aluminium Windows & Doors, they are a great company to deal with, always glad to help & are very knowledgeable about their ever growing range of aluminium products.

5 Stars Review

First Class Service

Novaglass Installations Ltd

We have had the pleasure of dealing with Capital Windows for nearly 30 years. We find the quality of products and service provided first class. They are always keen to keep up with the current market trends and always looking at new products to offer trade customers.

5 Stars Review

Friendly Staff

Richards Building Services (RBS) Ltd

We always use Capital Windows to supply all of our windows. All of the products are of extremely high quality with the bonus of very friendly staff. We look forward to using your products in the future!


5 Stars Review

Established in 1979, Capital Windows Ltd provide the biggest choice of home improvement products from the leading names and systems companies.