What services does Guimapex SRL offer?

We install and replace VELUX roof windows, fit roof lanterns, and install roller shutters, awnings and blinds in Belgium.

Yes. Every quote request is free and without obligation. Describe your project and we reply quickly.

Which municipalities do you cover?

We mainly work in Brussels, Walloon Brabant and Flemish Brabant: Wavre, Waterloo, Louvain-la-Neuve, Rhode-Saint-Genèse and surroundings.

Often yes. When sizes allow, like-for-like replacement limits work on interior finishes.

It helps, but external protection (shutter or awning) is more effective against overheating.

Yes — recent glazing often reduces noise from rain and traffic.

Comfort · 5 min · 2026-04-10

How a high-performance roof window and sun protection improve under-roof thermal comfort.

High-performance glazing limits heat loss. A closed roller shutter at night further boosts insulation.

Heat mainly enters through exposed glass. External awnings and shutters stop much radiation before it enters the room.

Older models often insulate poorly. A modern VELUX replacement transforms loft comfort without redoing the whole roof.

Is an interior blind enough against heat?: It helps, but external protection (shutter or awning) is more effective against overheating.
Does replacement also improve acoustics?: Yes — recent glazing often reduces noise from rain and traffic.

A roof window, lantern or shutter project?