Buying guide4 min
PVC vs Aluminium: which window should you choose?
Insulation, price, lifespan and design: everything you need to know to compare the two materials and choose the right solution for your project.
Practical guides
Tips to help you choose the right windows.
Clear guides written by our team to help you understand standards, materials and financial incentives available in Switzerland.
Technical5 min
Understanding Uw, Ug and Uf values
Uw, Ug and Uf describe heat transfer through the glass, frame and complete window. Definitions, units and practical Swiss examples.
Grants & subsidies7 min
Swiss grants for window replacement
Is window replacement subsidised in Switzerland? Verified 2026 guidance for Bern, Fribourg and whole-building renovations.
Construction7 min
Windows for highly energy-efficient buildings
Uw, glazing, solar g-value, airtightness and installation: criteria for windows in Minergie-P and highly efficient buildings.
Glazing8 min
Double or triple glazing in Switzerland?
Double or triple glazing: compare insulation, comfort, weight, solar g-value and renovation constraints before choosing.
Diagnosis8 min
Window condensation: causes and solutions
Condensation inside, outside or between panes: identify the likely cause and choose the right response without jumping to conclusions.
Acoustics8 min
Which windows reduce road noise?
Choose windows for road noise using declared acoustic ratings, glazing, seals, ventilation and installation details.
Renovation9 min
How to choose windows for a renovation
Choose renovation windows by assessing condition, Uw, glazing, material, acoustics, ventilation, junctions and facade coordination.
Installation8 min
Window replacement: process and preparation
From diagnosis to handover: understand the window replacement process, decisions to make and checks to complete.
Got a project in mind? Let’s talk.
BO Fenster guides you from selection to installation, with a free quote within 24h.
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