Page 22 - SureCav Design Handbook 2018

Page | 22 Quick Facts

Air Vents ● Cut a slot in the SureCav panel for the vent

Perp Vents ● Ensure the slot is of adequate size
● Adhere to regulations on venting cavity

1. Installing a Cavity Wall Vent In Traditional Construction
(As required by Building Control)

Block Insulation SureCav25 Air vent DPC or tray Timber-frame option

Cut a slot in the SureCav sheet 10mm wide and 65mm high to
match the profile of the ventilator.

If the intended slot (as shown in the white circle above) does
not coincide with the edge of the SureCav sheet then simply
drill a 10mm diameter hole at the top and bottom and cut the
material away.
Compliance

The Building (Scotland) Regulations 2004 Drill the 10mm holes, as
Vent wall cavities with a masonry outer leaf by installing shown above, to match
ventilators with at least 300mm2 free opening area at 1.2m your ventilator and then
maximum centres. (If required) cut out the material
between them to
NHBC Standards produce the slot needed
The cavity ventilation should conform to the requirements of for the vent.
the timber frame manufacturer.

SureCav recommend Cavity Trays for all your ventilation requirements. The Type W may be
used to provide the balanced air conditions demanded within the cavity in traditional
construction. Cavity Trays Ltd., Yeovil www.cavitytrays.com