Plenty Of Optios To Comply With Building Regulations Standards

Specialist aluminium fabricator Fentrade is ensuring its customers comply with the latest changes to part L of the building regulations by manufacturing in the Optio 58BW casement HI and BSF70 HI bi-fold door systems from Aluk.

The Optio 58BW casement HI window achieves a U-value of 1.4W/m²K with standard double glazing and 1.2W/m²K with triple glazing. Similarly, the BSF70 HI bi-fold door achieves a U-value of 1.4W/m²K with standard double glazing and 1.1W/m²K with triple glazing.


 “June saw the latest changes to the building regulations come into force and updates to document L meant installers needed to ensure they are fitting windows and doors that are compliant with tighter thermal efficiency standards.”

– Chris Reeks 

Director, Fentrade


Thermal performance

As a response to the tougher U-values required within part L, we began manufacturing the two updated Aluk systems which have been enhanced for improved thermal performance alongside our existing range of products,” continues Fentrade’s Reeks. “The newly improved systems comply with the latest standards and offer the same engineered solutions that make the products popular with our customers.”



The Optio 58BW casement HI window has clean lines and is available with a range of customisations including square, bevelled or flush casement options. The windows are available in a wide range of single, dual and anodised colour finishes to suit all applications.

The thermally-broken BSF70 HI bi-fold door offers product versatility with its multiple opening configurations. With a choice of handle and colour styles and adjustable rollers for ease of installation, the frames can be supplied flat packed for tight access locations if needed.


And as with all Fentrade products, there’s a rapid and reliable turnaround from order to delivery, including a quote within 24 hours.


Council for Aluminium in Building

Fentrade offers customers a structured and reliable delivery schedule covering south and west Wales and the south-west and central England. The fabricator is a member of the Council for Aluminium in Building and prides itself on maintaining the highest standards.

Picture: A Fentrade installation complying with the latest building regulations.


Article written by Cathryn Ellis
18th August 2022


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