A well-ventilated cavity wall is important for the quality and durability of a facade. Moisture can develop in the cavity due to wind-driven rain or residual construction moisture. Ventilation and drainage of cavity walls are necessary to remove vapour and moisture that have entered the cavity as a result of penetration or condensation. This is of great importance for preserving the structural integrity of the building. To enable this ventilation and drainage, openings are created in facades.
Traditionally, perpend joints are left open at certain locations during construction to ventilate and drain the cavity. These open perpend joints allow air and water to pass through but also permit pests, leaves, and other debris to enter. In addition, the often irregular black openings are not visually attractive in the facade. As a result, open perpend joints are used less and less in modern construction.
Nowadays, cavity wall weep vents are usually installed during bricklaying. These vents combine ventilation and drainage with protection and a neat facade appearance. Tilmar cavity wall weep vents provide a solution for cavity ventilation in which functionality and appearance come together. Perpend vents are available for both new construction and retrofit installation. Tilmar even offers cavity ventilation vents for rendered facades.
Would you like to know where and in what quantities weep vents should be installed in a facade? Clear masonry guidelines and standards are available for this purpose. Our blog on installation guidelines for weep hole ventilation explains how these can be applied in practice.
Cavity wall weep vents are installed in masonry instead of open perpend joints. Weep hole vents prevent vermin and dirt from entering and also improve the appearance of the facade. Weep hole vents ensure optimal ventilation of the cavity wall and create a neat and uniform facade appearance. They also contribute to keeping external moisture out and enable controlled ventilation of the cavity.
In addition to vents that are built into the masonry during construction, there are also solutions for existing facades. These vents are installed afterwards in open perpend joints and are intended to improve the facade appearance and protect the cavity against vermin and dirt.
Advantages of Tilmar cavity wall weep vents include:
• Protection against moisture and driving rain
A weep hole vent provides an effective contribution to preventing external moisture penetration. The vents are designed to limit wind-driven rain while maintaining ventilation capacity.
• Protection against dirt and pests
In addition to moisture, pests also pose a risk to open cavity constructions. An external separating structure must not contain openings wider than 1 cm (Dutch building regulations). Cavity wall weep hole vents prevent mice from entering and stop unwanted animals from penetrating the cavity.
• Dimensional accuracy and higher bricklaying speed
Cavity wall weep vents ensure dimensional accuracy during bricklaying and are easy to install. Notches and grip edges provide good anchoring in the facade. The use of weep vents eliminates the need for joint raking, resulting in faster bricklaying and less repair work.
Tilmar offers various cavity wall weep hole vents for new construction and renovation that ensure optimal cavity ventilation:
The SpouwSafe stainless steel retrofit weep vent is the solution for renovation and installation in open perpend joints. The vent is easy to install without special tools and fits joints between 5 and 25 mm wide. SpouwSafe adapts to uneven joints and clamps into place so that it cannot be removed by hand.
For cavity ventilation in rendered facades, wall tubes can also be used in addition to weep vents. The TS wall tube is a perfect solution for cavity ventilation in rendered facades. Suitable for installation in the plaster layer or during renovation, including insulation.
The T110, T110 ECO and T120 are plastic perpend weep vents for new construction. The plastic design makes the vents lightweight and resistant to moisture. The material requires little maintenance and retains its shape and function throughout the lifespan of the facade.
The T110 plastic cavity wall weep vent ensures optimal ventilation of the cavity wall and a neat, uniform facade appearance. This vent is the most commonly used solution for new construction. The T110 ECO is specifically developed for sustainable facades with slim facade bricks. The T120 provides an attractive facade appearance because the blades align directly with the brick. The difference compared to the T110 is mainly in facade appearance and price.
The T140 is a stainless steel cavity wall weep hole vent for new construction. The stainless steel vent creates an exclusive façade detail and is attractive, durable, and vandal-resistant. This stainless steel weep vent enhances the appearance of the facade and retains its quality and finish throughout the lifespan of the façade. In addition, any colour can be supplied to match the facade.
Within the cavity ventilation range, cavity wall weep vents can be combined with other Tilmar products to coordinate ventilation provisions.
In addition to ventilating the cavity, attention should also be paid to crawl space ventilation. T110 and T120 cavity wall weep vents can be combined with the FlexVent-HV floor ventilation duct.
The T140 stainless steel weep vent can be combined with the T172 stainless steel built-in tray, creating a clean and durable detail even in high-end façades.
The SpouwSafe stainless steel retrofit weep vent can be combined with the RenoFix stainless steel renovation vent, allowing open perpend joints in existing façades to be functionally closed while improving the façade appearance.
Tilmar cavity wall weep hole vents provide:
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