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Proctor Air® is an air and vapour-permeable, highly water-resistant roofing underlay. Its characteristics allow even very complex pitched roofs to breathe, without the need for air gaps or secondary venting.

The high-performance meltblown core at the heart of Proctor Air allows natural air movement to ‘supercharge’ the passage of moisture vapour from the roofspace, making the formation of condensation in the roofspace virtually impossible.

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[[start key]]

Vapour permeable

Fully air permeable

Highly water resistant

More uniform airflow than vents

Wind Uplift Resistance Complies with BS5534

No VCL required

15 year warranty

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[[start spec]]

Length: 50 m
Width: 1 m or 1.5 m
Water Vapour Resistance SD Value: 0.02 m
Vapour Resistance: 0.1 MNs/g
Mass per unit area: 170 g/m²
Tensile Strength: 
- MD: 420 N
- CD: 336 N
Elongation:
- MD: 95%
- CD: 94%
Tear Resistance:
- MD: 188 N
- CD: 172 N
Watertightness: W1
Hydrostatic Head of Water: 101.6 cm
Fire Rating: Class F

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[[start app]]

Wind Zone:

Zones 1 to 5
No tapes required in zones 1 - 4.

Batten Guage
<= 345mm - Zones t to 4
<= 250 mm - Zones 1 to 5

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