Weep Vents for Lintels

Weep Vents

Weep Vents create weep holes which are required over lintels to discharge collected water that may form at the window/door head. Each vent sits in the masonry perp end.

Keystone Weep vents are positioned within the perp joints between masonry. Their function is two-fold:

  1. They act as a weep to discharge water from DPCs, cavity trays and lintels.
  2. They also act as ventilators to encourage the cavity to breathe

Keystone Weep-vents also satisfy UK NHBC and Building Regulation requirements.

The compact Keystone Weep-vent can be accommodated within perp joints even when the external skin is constructed from masonry units of minimal height. They are therefore suitable for use within a wider range of walling styles.

The Keystone Weep-vent performs efficiently and, being available in several colours, merges and harmonises within masonry in which it is incorporated. Keystone Weep-vents have full height, baffle-protected water discharge routes and are not susceptible to blocking.

49mm x 87mm x 9mm.
Free airflow approximately 300mm per unit

Weep Vents
BS Polypropylene

Installation Sitework
Vents are required at 450mm intervals and each opening
should have at least 2 weep holes.

Technical requirements
BS5628- 3 2005 advises “Proprietary devices may be installed to form weepholes. They may be designed to drain the cavity but prevent the ingress of wind-driven rain. The Keystone Weep-vent provides all functions and can also be used as a perp ventilator. Vents are required at 450mm intervals and each opening should have at least to weep holes.