Defogging in Montréal

Defogging in Montréal

Montréal possède un parc immobilier parmi les plus anciens au Québec, avec des milliers de triplex et duplex centenaires sur le Plateau, à Rosemont et dans Verdun. Les fenêtres à guillotine d'époque et les vitres thermos des années 80-90 arrivent massivement en fin de vie, causant buée, infiltrations et pertes énergétiques importantes durant nos hivers rigoureux.

Vosthermos offers a complete defogging service to Montréal residents. We serve all neighborhoods including Le Plateau-Mont-Royal, Rosemont-La Petite-Patrie, Verdun, Notre-Dame-de-Grâce, Villeray.

Common problems in Montréal

Understanding the three types of fog in a sealed unit

Not all fog is identical, and the type of fog determines whether defogging is the appropriate solution. Dry fog (or halo) appears as a permanent whitish haze between the panes, often more visible around the edges. It is caused by mineral deposits left by repeated evaporation of moisture that has infiltrated and dried out over time. This type of fog is the most common and generally responds well to defogging.

Wet fog appears as visible droplets or condensation between the two glass panels. It indicates active moisture infiltration through the broken sealant. If the wet fog is recent and the sealant is not too deteriorated, defogging can be effective. In cases where the infiltration is severe and long-standing, sealed unit replacement is often preferable.

Misty fog presents as a diffuse, uniform haze between the panes. It often results from a combination of mineral deposits and residual moisture. This type of fog can be more difficult to treat by defogging, and our technician will honestly assess the chances of success before proceeding.

Frequently asked questions — Montréal