- Product Description
- Maintains water tightness even after exposure to water based preservatives
- Can be used as a temporary roof covering for up to three months before the roof covering is laid
- Excellent nail tear and tensile strength
- Easy to cut, clean and light to handle
- Unaffected by temperature changes
- Proven time saving over 1F Felt
- Unrestricted use for wind uplift in all exposure conditions in the UK and Ireland
Glidevale Protect A1 Roofing Underlay 45mtr x 1mtr
Glidevale Protect A1 Roofing Underlay is a third generation roofing underlay which has been developed specifically to overcome the disadvantages of traditional Type 1F felts and second-generation plastic sheet materials.
Protect A1 can be used for all pitched roof constructions (tiled and slated), whether the insulation is at ceiling joist level or at rafter level.
- Length: 45mtr
- Width: 1mtr
- Roll Size: 45 m/2
- Material: Twin-ply construction of polypropylene non-woven spunbond layer with UV stable PP film
- Roll weight: 7kg (including core)
- Has unrestricted use for wind uplift in all exposure conditions in the UK & ROI
- Dark grey upper surface reduces glare and takes a chalk line marking
- Surface printed with product branding for ease of identification
- To be laid in accordance BS 5534: Part 1 and manufacturer's instructions
- As with most underlay materials, do not lay in direct contact with any un-dried timber preservatives (whether water or solvent based).
- To prevent UV degradation of the underlay, & to avoid sagging and ponding of the underlay behind fascia and ensure correct water discharge into the gutter, underlay support eaves trays (available separately) should be used at all gutter details.
- Roof space ventilation should be provided at both low and high level as with all impermeable (type HR) roofing underlays irrespective of insulation type or position.
- A1 has unrestricted use from zones 1 to 5 at the maximum batten gauge of 345mm.
- No adhesive tapes are required to restrain the overlaps.
- Where insulation follows the rafters, there must be a ventilated air space at least 50mm deep above the insulation and beneath the underlay.