





💨 Breathe New Life Into Your Roof — Stop Condensation Before It Starts!
The Manthorpe Pack 20 G630 Felt Lap Vent Stops are a retrofit ventilation solution designed to increase airflow in roof spaces with lapped felt or membrane construction. Each vent provides 3,000mm² of free airflow and fits joist centres between 400mm and 600mm. Easy to install with a tapered lead-in and secure felt clips, these vents help prevent condensation buildup caused by additional loft insulation. While not a standalone ventilation system, they are essential for improving attic airflow and maintaining roof integrity when upgrading insulation.
| Manufacturer | Manthorpe |
| Part number | G630 |
| Item Weight | 1.63 Kilograms |
| Package Dimensions | 30.1 x 23.4 x 12.3 cm; 1.63 kg |
| Manufacturer reference | G630 |
| Item Package Quantity | 20 |
| Batteries Included? | No |
| Batteries Required? | No |
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