Trade aluminium windows in County Durham

Ordering aluminium windows for jobs in County Durham

A polyamide thermal break separates the inner and outer parts of the frame, which is what lets aluminium windows meet modern thermal requirements.

Aluminium is stiffer than uPVC, so frames can be slimmer for the same window size, which is why it is often specified for extensions where the client wants as much glass as possible.

Specification at a glance

• Slim sightlines for larger glass areas
• Flush or stepped sash options
• Double or triple glazed sealed units
• Trickle vents where specified
• Thermally broken aluminium frame and sash with polyamide thermal break

Delivery across County Durham

We deliver to sites and yards in County Durham as part of our mainland delivery service. Delivery is priced on the quote, so you know the full cost before you place the order.

Building regulations in England

Replacement windows in England should meet Approved Document L: a U-value of 1.4 W/m²K or a Window Energy Rating of band B. Approved Document F expects background ventilation to be no worse than before, which usually means trickle vents. Glazing in critical locations must break safely, be robust or in small panes, or be permanently protected under Approved Document K, which in practice usually means toughened or laminated safety glass. Rooms that need an escape route may need an escape window under Approved Document B. Replacing windows is notifiable building work: the installer self-certifies through a competent person scheme such as FENSA or Certass, or the work goes through building control.

Every order is confirmed in writing first. The acknowledgement lists each item exactly as it will be made, so any mistake in a size or handing can be caught before manufacture.