It is important that the style of your new windows and doors matches your home. Whether you are changing the original windows or replacements installed later, you should always consider the internal as well as external appearance, as you will spend more time looking out of your new windows than looking in! Also, give thought to the practicalities of whether you want your sashes to be inward or outward opening, left or right-hand opening, or for access and egress.

Rationel offers a wide range of window options. So, consider the requirements of your house carefully, and we will find the perfect solution for you and your home.

Rational manufacture bespoke windows and doors designed for almost any building or architectural style.


We are proud to announce we are now Internorm-partners.

Coinciding with the opening of our new Showroom at Unit 4.1, Parc Melin, Glanyrafon, Aberystwyth this partnership will add to our portfolio of products from top quality manufacturers.

Call into find out more about the Internorm range.

Find out more on the Internorm Website


  • Thanks for everything. The house is so much warmer already.

  • Very pleased with my new windows. They were installed within days of the order. Thank you Clive.