Les changements de conditions météorologiques peuvent-ils provoquer une infiltration d'eau dans mon bâtiment?
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Can changes in weather conditions cause water infiltration in my building?

Understanding the Impact of Weather Conditions on Water Infiltration in Masonry Structures

Maçonnerie Montréal is a top-tier masonry company serving the Greater Montréal area, Laval, Longueuil, the South Shore, and North Shore with exceptional masonry services. We have an established "Water Infiltration Repair Services" section on our website, offering dedicated solutions to tackle all your water infiltration problems. This article, specifically focusing on the connection between changing weather conditions and water infiltration in buildings, aims to provide a comprehensive understanding of this often overlooked issue.

The Nexus between Weather Changes and Water Infiltration

Water infiltration in buildings primarily refers to the unwanted penetration of water into the building envelope through various pathways like the foundation, roof, or walls. However, the susceptibility of a building to water infiltration isn't a static factor. It's subject to change with fluctuations in weather conditions.

Role of Rainfall in Water Infiltration

Rain is one of the most common sources of water infiltration. The driving rain against the building façade can exploit any existing cracks or voids, leading to water seeping into the structure. The severity of infiltration tends to increase during periods of heavy or continuous rainfall. The direction of the rain driven by the wind also impacts the extent of infiltration, with the windward side of the building usually experiencing more water penetration.

Temperature Fluctuations and its Effects

Freeze-thaw cycles can also significantly contribute to water infiltration. As the temperature falls below the freezing point, any water present within the pores or cracks of the masonry material can freeze and expand. This expansion exerts pressure on the surrounding material, often causing it to crack or spall. These new or widened openings further enhance the structure's vulnerability to water infiltration.

The Impact of Humidity and Condensation

High levels of humidity can lead to condensation within the building elements, which might lead to damp conditions and potential water infiltration issues. This is particularly prevalent in buildings without a properly installed or functioning vapour barrier. The difference in indoor and outdoor temperature, coupled with high humidity, can cause condensation within the walls, leading to dampness and potential water damage over time.

How Wind Drives Water Infiltration

Wind can exacerbate the issue of water infiltration in two ways. First, it can drive rain against the façade of the building, increasing the chances of water ingress. Second, high wind speeds can create a pressure differential across the building envelope. This pressure difference can drive moisture into the building, especially if there are any existing defects or breaches in the envelope.

Preparing Masonry Structures for Adverse Weather

Mitigating the risks associated with weather-induced water infiltration involves proactive steps in the design, construction, and maintenance phases. Ensuring the use of appropriate, high-quality materials can greatly enhance the structure's resistance to water penetration. For instance, the use of water-resistant mortar, adequately installed flashing, weep holes for drainage, and vapour barriers can all contribute to the reduction of water infiltration.

Moreover, regular professional inspections can help detect early signs of water infiltration, enabling timely repair and preventative measures. These could involve sealing cracks and openings, improving drainage systems, or installing additional waterproofing measures.


Changes in weather conditions can indeed lead to water infiltration in your building, emphasizing the need for a resilient building design and routine maintenance. As an established masonry company, Maçonnerie Montréal is committed to providing top-notch services, addressing not just the symptoms but the root causes of water infiltration, ultimately enhancing the lifespan and integrity of your masonry structures.