Installing Authentic Roof slates.
It is recommended that this material be installed on a sloped roof of no less than a 15 degree pitch. On a 45 degree pitch or less, sarking should be used. Authentic Roof can be installed on plywood or battons.
The line-up scales on the sides of the slates are intended as an approximate guide. To ensure straight lines and to maintain exact exposure in the rows, a chalk line or straight edge should be used. To cut to size or shape, score well on the front with a sharp utility knife and fold back, then trim. Slates can also be cut with a circular saw or jigsaw.
Important: Do not use a nail gun to install these slates. Nails should be placed in the divots provided and should not be driven in extremely tight.
Colour variations.
Authentic Roof is made from Recycled TPO that may have different amounts of carbon black in the material. Similar to natural slate, colour may fluctuate from pallet to pallet, so blending the product is very important. Select a bundle from each pallet and then a slate from each bundle to evenly spread any variation throught the roof, further improving the "natural" look of the roof.
Exposures
Exposures are 152mm, 165mm & 178mm (6", 6.5", 7") measured from the bottom of the slate. In extremely high-wind areas use only 152mm exposure. It is required that a 5mm gap be maintained between the slates (side-by-side) and this gap is achieved automatically during installation. Authentic Roof slates are totally impervious to moisture penetration but it is always important to ensure your roof has proper ventillation.
Storage
It is recommended that Authentic Roof slates be stored in temperatures above 0 degrees celcius. Extremely cold temperatures will not affect the slates themselves but may pose a problem during installation. It is not advisable to carry out installation in temperatures below 0 degrees, but if it is necessary, store the slates in a warm place before use.
Hip & Ridge
Hip and ridge slates are slightly different to the regular roof slates as they have a narrow channel on the back, runnning down the centre. A heat gun should be used to gently heat this channel allowing the slate to be bent easily to the desired angle. They should be trimmed along the top side edges so as to not protrude from under the next cap that is placed on top - this is for aesthetics only.
Warranty
This product can be installed by anyone with a good knowledge of proper roofing procedure and does not require any specialised equipment or training. Installation should be in accordance with all recommendations and local council or state building codes, as failure to comply may void warranty.
