Proper installation of weep vents is a key consideration in construction to safeguard buildings against water damage and ensure structural integrity. Weep vents are small openings integrated into masonry walls and facilitate drainage by allowing water to exit the wall system. The frequency at which weep vents should be installed is laid out by the National House Building Council.
How Often Should Weep Vents Be Installed in Masonry Walls?
In masonry walls, such as those constructed with brick or block, the placement of weep vents is a crucial aspect. It's essential that weep vents are placed at regular intervals along the base of the wall at the ground floor, below the DPC level, and must also be provided as part of any cavity tray run, including roof abutment trays, over lintels and continuous cavity tray systems, such as gas protection barrier systems.
Vents are required at 450mm intervals to comply with National House Building Council (NHBC) recommendations in the UK.
How Many Weep Vents Should Be Installed Around Windows and Doors?
Weep vents should be strategically placed around openings such as windows and doors. These areas are particularly susceptible to water infiltration, and installing weep vents around openings helps prevent water accumulation and potential damage to the building envelope.
Each opening, such as windows and doors, should have at least 2 weep holes to comply with National House Building Council (NHBC) recommendations in the UK.
Weep Vent Maintenance
Regular maintenance and inspection of weep vents are essential to their continued functionality. Over time, debris and other materials can obstruct the openings, hindering proper drainage. Check weep holes each year, especially before rainy seasons, to ensure they are not clogged. If they are blocked, simply use a tool like a screwdriver or even a toothpick to clear away leaves, dirt and other debris.
Properly spaced and maintained weep vents are instrumental in safeguarding buildings against water damage, promoting longevity, and maintaining the structural integrity of the building.
Which Weep Vents Do I Need?
There are a few different styles of weep vents for your construction.
- Wall Weep Vent - The multi-function 1143 cavity wall weep is designed for cavity ventilation and reliable discharge of water from inside cavity walls. This could be over external lintels or wherever a cavity tray system is installed.
- Tunnel Weep Vent - Used for discharging water from external walls in a range of situations, including at ground floor slab level, within cavity tray systems, over external lintels and on external masonry walls.
Our selection of weep vents at Fastbuild is available in a range of colours to suit brickwork.
