When you’re choosing windows and doors, you need to feel sure you’re making a sound investment in your home. That’s why we’ve engineered an outstanding system, and in turn, that’s why we have no hesitation in backing our products with comprehensive guarantees.

All Stellar’s aluminium profiles have an optical and mechanical performance guarantee for a period of 10 years. This guarantee does not cover window fittings, glass or components not manufactured by Epwin Window Systems and does not affect the statutory rights of the consumer.

Paint Finish guarantee

A 25-year guarantee covers the coated aluminium against the following:

  • Peeling, powdering and blistering
  • Corrosion except due to bending or folding after the application of the paint
  • Chalking, fading and loss of sheen out of the Qualicoat* regulation
  • Filiform corrosion.

*Qualicoat is an organisation committed to maintaining and promoting the quality of coating on aluminium and its alloys used in architectural applications. It gives purchasers the assurance of a premium grade product.

Tested and Proven

Our product development, manufacturing and fabrication are designed to ensure you get windows and doors of the very highest quality. We design, model, prototype, test and refine constantly until we’re completely satisfied.

Every component is subjected to rigorous testing. Moving parts are operated through tens of thousands of cycles, windows and doors are put into test rigs and battered by ‘wind’ and water to ensure they can withstand nature’s forces. In-house laboratories control and monitor our production. Independent agencies have verified our results.

Lifetime Security Guarantee

Yale is one of the most trusted names in security. Their hardware is a perfect fit with the Stellar system and comes complete with Yale’s very reassuring Lifetime Security Guarantee.


Up to £1000 towards home insurance excess
in the unlikely event of a break-in.

Up to £1000 towards repairs or replacements
of any failed Yale components.

£1000 compensation
if a break-in is caused by the failure of a Yale component.

Up to £250 refund on call-out fees
if a home needs to be secured after a break-in resulting from a failed Yale component.

Download the Yale Leaflet here