Manthorpe G935 Cavity Wall Extension Sleeve 9 x 3" – Pack of 2
£7.99Inc. VAT
- Size
- For 9 × 3in air bricks
- Pack
- Pack of 2
Finish
Pack
- Real peopleStaffordshire team · 01889 441 404
- Secure checkoutEncrypted payment via Shopify
- Free UK deliveryOn orders over £75
What it does
Fitting notes
Delivery & returns
Free UK delivery on orders over £75. Packed and sent from our UK warehouse. Delivery policy Returns policy
- Free UK delivery over £75
- Packed in our UK warehouse
- Real help on 01889 441 404
- Secure checkout
- Trade-name manufacturers
- Free UK delivery over £75
- Packed in our UK warehouse
- Real help on 01889 441 404
- Secure checkout
- Trade-name manufacturers
In the home
Let the roof breathe.
Moving air stops winter condensation settling into timber and plaster. Small vents, fitted in minutes, keep a house dry for years.
Side by side
Good to know
Questions before you buy
Finish the job
Often bought for the same job
Manthorpe G935 Cavity Wall Extension Sleeve 9 x 3" – Pack of 2
Extension sleeves that fit the back of a G930 air brick to carry ventilation through a cavity wall. Each pair adds 120 to 280mm.
Key features
- Adds 120–280mm per pair
- Fits the back of a G930 air brick
- Extend further horizontally, or stack to form 9 x 6" or 9 x 9"
- Modular and simple to install
- Independently tested by BRE
Specification
- Part number: G935
- Size: 9 x 3"
- Equivalent area: Up to 6,600mm²
- Quantity: 2 sleeves
Uses
- Ventilation for heat-producing appliances
- Background room ventilation
- New build, refurbishment and remedial work
Standards
- BRE Digest 17 and 262
- Building Regulations C4
- NHBC Standards 5.2
- BS 5250:2011 control of condensation in buildings