Boavista fibreglass sliding doors | John Knight Glass | Heswall, UK
Dual Boavista fibreglass sliding doors

Boavista fibreglass sliding doors

Looking for an alternative to the aluminium sliding door? It is finally here with the Bovista fibreglass sliding door we have a product which is similar in visual appearance to an aluminium door although has enhanced properties including thermal and strength.

The manufacturing process of fibreglass creates a stronger profile than is possible with aluminium, the strength of this product makes it perfect for costal and high wind areas. The fibreglass material is also extremely weather resistant adding to the suitability of this product in costal areas as the frame is extremely resistant to salt air.

Thermally one of the issues with aluminium is the metal profile, due to being extremely conductive aluminium is not a great thermal insulator, thermal break are a great help however there is still room for improvement. This is where fibreglass rally comes into play, the frame is much more thermally efficient very similar to that of timber of UPVC.

If you are looking for a slimline sliding door the BWSL 45 could be the perfect door for you and your project.The fibreglass frames make an important contribution to sustainable building design and are the perfect choice for any 21st century project.




BWSL 45 sliding frame


Air Permeability

Wind Load Resistance


Thermal Performance

Acoustic Performance


BOAVISTA windows serve their practical purpose to the highest standards while expressing the vision of sustainability and having both visual and tactile appeal. You can take great comfort that their thermal and acoustic performance mean you have chosen an environmentally responsible product.

Available in any RAL colour so you can choose the colour that best suits your project’s design, and whether you prefer a matte or textured finish. A diverse range of handles and accessories make your designs unique.


 BWSL 45 Sliding - Based on a modular system that allows multiple configurations; -

 - Sashes up to 250 Kg (ex: 2,2 x 2,85 m).

 - Low frame compatible to flush installations.

 - Versatile lock up-gradable to multi-point locking.



Technical Drawings

Fibreglass sliding doors