Revolutionary Low Pitch Slate Roof System for 12° Pitches

The Permavent Easy Slate low-pitch slate roof system rips up the rule book when it comes to roof pitch and slate laps. A unique patented system in the form of a strip that fits under each slate joint, prevents water from creeping sideways.

Easy Slate roof system vastly improves the performance of the slates, enabling roof pitches as low as 12 degrees. The slates are still installed in a double lapped pattern, so there is no discernible difference in appearance on the roof.

Key Benefits of Permavent Low Pitch Slate Roof System

The Permavent Easy Slate system combines 100’s of years old double lap reliability with innovative low pitch performance. How does this Easy Slate solution deliver superior weatherproofing and longevity on roofs as shallow as 12°?

Ultra-Low Roof Pitch Solution

• Patented under-slate strips break capillary action, so water can’t creep sideways, even at 12° (vs. standard 22° minimum).

BS 5534-Compliant Weatherproofing

• The low pitch roofing system is engineered to meet the British Standard rules for minimum headlap, side lap and roof pitch for UK conditions.

Traditional Double Lap Appearance

• The roof pitch slates are still installed in the traditional double-lap pattern, preserving your roof’s classic aesthetic.

Roof Water Management

• Permavent’s low pitch slate roof channels rainwater safely from course to course, minimising water leakage risk and protecting battens, fixings and sub-structure.

Improved Roofing Ventilation & Condensation Control

• The increased spacing between each slate promotes better ventilation of the vapour permeable underlay.

Wind Uplift Resistance

• By channelling wind pressure into the underlay, the slates remain firmly anchored even on exposed windy roofs.

Minimise Leakage in Low Pitch Slate Roofs

To minimise leakage through the slating, there must be limitations, dependent on the size of slates, on roof pitch and rafter length. But even so, during a roof’s service life, which can be 40 to 60+ years, there will be weather events in which water will penetrate the slating. If this happens with any frequency, there is a risk of long-term damage to the roof sub-structure, battens and fixings. .

Capillary Action & Airflow Technology Advantages

Easy Slate increases the gap slightly between each slate, not only making water creep through capillary action far less likely, but also encouraging better air flow between the outside atmosphere and the batten cavity. This improves the efficiency of the vapour or air-permeable underlay in removing unwanted condensation from the roof structure, something particularly important for slates that have smooth surfaces, for example, fibre cement slates.

Wind Uplift Resistance Through Ventilated Design

Also, the higher airflow through the slating increases the security of the slates against wind uplift as a larger proportion of the wind load is then borne by the underlay.

Guaranteed Performance with Easy Roof System

Easy Slate not only revolutionises double lapped slating, when installed as part of the Permavent Easy Roof System it comes with a 40-year guarantee.