Exterior doors
UNIQUE DESIGN
As a manufacturer of windows and doors with extensive experience in the industry, we offer a number of proven solutions. Bertrand's offer includes steel, aluminum, wooden and PVC external doors - all of these variants are characterized by high quality production, the use of durable materials and functionality. There are many designs, technical solutions and accessories to choose from that influence aesthetics, safety and comfort of use.
Knowledge zone
Get to know us behind the scenes of our activities and stay up to date with the innovations we are preparing for you!
Blog
How to choose the right patio doors?
Summer is in full swing and that means more time spent outdoors, relaxing on the terrace or balcony. To these
Blog
Cortizo aluminum systems now available at Bertrand!
We are happy to announce that the latest aluminum systems from Cortizo have been added to our offer. These innovative sliding windows and doors
Blog
Does glass in windows matter? – Our guide to glass types
Choosing the right type of glass for windows is a key element affecting the comfort, safety and energy efficiency of the building. Additionally, the right selection