Injection moulded polypropylene weep vents, generally used to drain lintels trays, cavity trays and to provide ventilation in cavity walls.

The vents have a baffled grill to prevent the ingress of driving wind and rain and incorporate an insect grill and drip lip.

It provides 220 mm² free airflow and is used in high drainage applications.

Available in a range of eight colours and designed for fitting into open perpendicular joints spaced at no greater than 900 mm centres.

NHBC guidelines recommend 450 mm maximum centres, with at least two weep vents above all windows and doors.

Standard product features

Size (l x h x t):

100 mm long x 65 mm high x 9 mm thick.



G951 Extended Peep Weep - For use in conjunction with type G950 Peep Weep to provide an extended weep vent where required.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-80-50/384 Perpend joint plastics weep holes

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Manthorpe Building Products Ltd


+44 (0)1773 303000

Product reference




Manufacturer details

Manthorpe House,
Brittain Drive,
Codnor Gate Business Park,
Derbyshire, DE5 3ND
Tel +44 (0)1773 303000
Fax +44 (0)1773 303300
NBS Plus