Granite Installation and Planning Information
Edging - Internal profile edges on all edge details other than bevel edge must have a radius of at least 60mm.
End Panels - The normal joint for these materials will be a butt joint with a 5mm overhang. Also available as extra are flush fitting butt joints and a flush fitted mitre joint. In all instances the panel will be manufactured to the correct height as this material is not easily scribed to the floor.
Joints - Granite joints are finished with a small ariss to the top edge. Silicone sealant is applied to prevent water ingression.
Thermal Expansion - Granite can expand up to 1mm per metre. A gap of at least 3mm should be left at each end of the worktop when fitted and filled with decorators caulk. When Granite is joined to other materials (such as glass, steel or wood) an elastic type of adhesive, for example polyurethane, is required for expansion.
Overhangs and Supports - Any overhang which extends more than 300mm should be supported.
Hobs - There is no warranty on recessed hobs and finished edges on recessed hobs may be serrated and chipped. There must be a minimum of 200mm between two hob cut-outs A minimum of 100mm is required between hob and sink cut-outs.
Sink cut-outs - A minimum of 70mm is required between two sink cut-outs. Sink cut-outs must be placed a minimum of 80mm from the worktop from edge. This is required under terms of the product warranty. If a waste disposal unit is fitted to an under mounted sink after installation, additional support will be required, otherwise you warranty may be invalidated. All sinks being attached to granite must be supported by the customer. Please ask the fitter for advice at template stage.
Upstands - Upstands should ideally be 100mm high, as material less than this height is extremely fragile. Upstands are not cut from the same slab as the worktop, therefore there may be a slight colour variation.
Scratching - Granite is scratch resistant but not scratch-proof. Small scratched less than 25mm in length are considered within tolerance by the manufacturer and are considered acceptable.
Handling - For installation you will need to supply additional labour on order which have worktops weighing above 150kg. Every additional 75kg requires an extra person to help with lifting.
Colour Variation - Drainer grooves and recessed drainers may be duller than the rest of the polished surface. Colour matching is not always possible as granite can vary dramatically throughout each scant. Samples should be used as a guide only.
Pitting & Veining - As granite is a natural stone, pitting and veining will occur in random distribution of swirls. Subtle variations in shade or areas of contrast will also appear within the body of the worksurface.
Fissures, Blemishes & Natural Flaws - Some level of what could be referred to as spots or blotches are inherent in the material. Small fissures are a common feature in any granite and these natural flaws were present at the rock formation.
Stainless Steel Sinks - Please specify the preferred undermounting of stainless steel sinks. Silicone sealant may be rendered ineffective when plumbing the sink in, it is important that the sink is resealed by the plumber, or the 12 months warranty will be invalidated. If a waste disposal unit is fitted to an undermounted sink after installation, additional support will be required, otherwise your warranty could also be invalidated.
Points of Note - The molecular structure renders granite very stable and rigid. It will not bend or flex, therefore granite is not suitable in long span applications. Limiting factors like access, stairs, service lift size and the fragile nature of the worktops should also be taken into consideration. Due to the nature of granite, thickness of worktops can vary slightly. Sheridan endeavour to keep this variation within a tolerance of +2mm.
