Permavent Easy Slate
This Permavent Easy Slate is a ‘side lap strip’ that works by sealing the perpendicular join on the slate and prevents the water from entering the layers of the slates.
Easy Slate extends the head lap from the tail of the upper slate to the head of the slate below. For example, a roof using 500 x 250mm slates with a 100mm lap, will now have a sealed perpendicular join and an effective head lap of 300mm.
On a regular slate roof there is often less than 0.5mm gap between the layers of the slates. Little or no gap between the slates means air pressure will draw the water between the slates via capillary action. This is one of the reasons that slates leak. When Easy Slate is used, slates are raised by 1mm and this allows the movement of air below the slates. This releases the air pressure thus eliminating the capillary action.
In addition this also eliminates wind slate rattle.
By increasing the head lap and removing the capillary action, the weather resistance of the roof is greatly improved. Slates can now be installed on many complicated, exposed or low pitched roofs where it was not previously possible.
Please note: 1 x strip is required per slate.