Protect VP400 Plus
Features & Benefits
- Highly vapour permeable roof underlay, but completely airtight
- Lowest vapour resistance of any Type LR roof underlay in its class
- Completely watertight >7.0 water resistance
- UV & Heat resistance
- Unrestricted use for wind uplift in all exposed conditions in Ireland
- Can be used as temporary roof covering for up to 3 months
- Helps avoid condensation risk in roof space in accordance with BS5250
Installation
- VP400 Plus LR vapour permeable underlay can be used for cold roof with ventilation or unventilated loft spaces. It can also be used for warm roofs with insulation between and or above the rafters.
- In accordance with good practice the membrane should be covered as soon as possible after installation.
- Do not lay membrane in contact with any un-dried timber preservative.
- Fix Protect VP400 with extra large clout nails of copper, aluminium alloy or galvanised steel, 20mm x 3.5mm
- Lay VP400 with minimum laps. 12.5°-14° = 225mm Horizontal & 100mm Vertical. ≥15° = 150mm Horizontal & 100mm Vertical
Product Codes
| Size | Width | Length | Area |
| 1 | 1.0m | 50m | 50m² |
| 2 | 1.5m | 50m | 75m² |
Specifications
| Material | Triple ply construction with royal blue upper and lower surface. 170gsm with waterproof and vapour permeable core laminated and protected between two layers of non-woven spun bonded polypropylene. |
| Nail Tear Strength (N) | 248 MD, 294 CD |
| Tensile Strength (N/50mm) | 325 MD, 305 CD |
| Water Vapour Resistance (MNs/g) 0 | 0.08MNs/g /0.016Sd |
| Watertightness | W1 |
| Hydrostatic Head of Water (cm) | 770 |
| Weight (g/m²) | 170 |
| Wind up lift resistance (600 rafter centres, 345mm batten gauge | Zones 1-5 |
