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Frequent masonry problems

Cracked sill

CAUSES

The window sill role is to push water away from the wall. Over time, the sill becomes more porous and lets more and more water penetrate during bad weather.

Moisture is trapped, which causes rust to form on the steel rod, located inside the sill.

Rusty steel swells and creates pressure on the sill which then results in a crack in the latter.

CONSEQUENCES

When there is a shattering and crumbling of the surface of a sill or a crack, water seeps under the window, damaging the wall and the other windows on the lower floors.

SOLUTION

Replace the cracked sill with a new cement or natural stone sill, protruding 4 inches on each side and fitted with a drip tray.

TYPES OF SILLS

  • Cement: The cement sill with a galvanized frame has the advantage of being less expensive.
  • Natural stone: The natural stone sill has the advantage of being more solid and durable. It is possible to lengthen and reduce the thickness without the risk of cracking.
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Lexique

Allège: Pièce de ciment ou de pierre située au bas d’une fenêtre ou d’un vitrage.

Acier galvanisé: Acier recouvert d’une couche de zinc dans le but de le protéger contre la corrosion.

Chantepleure: Fente verticale pratiquée dans un mur pour l’écoulement des eaux et la ventilation de l’arrière du mur.

Crépi: Enduit de plâtre ou de mortier, non lissé, dont on revêt un mur ou une fondation.

Fer angle: Profilé en métal dont la section forme un L situé au haut d’une fenêtre ou d’un vitrage servant à supporter la charge de maçonnerie supérieure.

Joints: Espace entre les briques ou les pierres lié par du mortier.

Larmier: Rainure située sous une allège ou un chapeau de cheminée, qui a pour fonction d’éloigner l’eau de la surface du mur.

Linteau: Pièce de ciment,de pierre ou d’acier située au haut d’une fenêtre ou d’un vitrage servant à supporter la charge de maçonnerie supérieure.

Calfeutrant: Scellant pour les portes, fenêtres et tout autre revêtement.

Lexicon

Sill: Piece of cement or stone located at the bottom of a window or glazing.

Galvanized steel: Steel coated with a layer of zinc to protect it from corrosion.

Weeping: Vertical slit in a wall for drainage and ventilation of the back of the wall.

Plaster: Plaster or mortar plaster, not smoothed, with which one covers a wall or a foundation.

Angle iron: Metal profile with an L-shaped section located at the top of a window or glazing used to support the load of upper masonry.

Joints: Space between bricks or stones linked by mortar.

Drip edge: Groove located under a sill or a chimney cap, which has the function of moving water away from the wall surface.

Lintel: Piece of cement, stone or steel located at the top of a window or glazing used to support the load of upper masonry.

Caulking: Sealant for doors, windows and any other coating.