Solar Limpets Advantages
Natural/Artificial Slate & 10 x 6 Tile Installations
Traditional Metal Hooks
|Tile and especially slate installs can be very time consuming.||Tile or slate, once trained 3-4 hours for a 4kwp install will be the norm.|
|On Rosemary type tiles, numerous tile breakages can occur below the roof hooks during and following installation of the PV system.||Installing Solar Limpets as per training reduces such breakages by 90 - 100%.|
|Numerous slate removal required.||No slate removals necessary. Not even to find the rafters.|
|Spare slate required to replace breakages.||No Breakages. Even when the Limpet roof hook is stood on!|
|Slate or tile cutting & notching required.||No cutting or notching required.|
|Spare tiles possibly required.||Each Limpet fitted produces 1 -2 spare tiles.|
|Flashings required.||No additional flashings required.|
|Packing of rafter tops required.||Packing not required.|
|Damage to slates caused by slate ripping etc.||No slate removals required.|
|Battens splitting when ripping original slates out (time consuming to repair!).||No slate removal/refitting required.|
|Not easy to install for a non- experienced roofer and often difficult, even for an experienced roofer.||Simple to install correctly for any tradesman.|
|Cable entry requires special flashing kits or imaginative options.||Limpets can be simply adapted to provide a weatherproof 4 & 6mm cable entry, for both slate and tile applications.|
|Limited/no adjustment to suit varying roof conditions, often causing additional stress to rails/fitted panels.||Automatic 360-degree adjustment available.|
|Loading is placed on individual rafters. To spread this load requires staggering the roof hook fixing positions onto alternate rafters.||Fixed into the rafters but over the battens, Limpets automatically spread any vertical loading via the battens to adjacent rafters.|
|Unsuitable or difficult for:
Foam sprayed or insulated slate roof coverings.
Modern interlocking type tile/slate coverings.
Warm roof type constructions.
Cross battened roofs and roofs where an overlay of insulation has been applied onto the rafters.
|No problem to install Solar Limpets.|
Health & Safety
Traditional Metal Hooks
|Possibility of hand and ear injury increased to installer using Slate ripper and lump hammer to remove galvanised and iron slate fixings.||Slate removals not required.|
|Specialist cutting tools required.||No tile or slate cutting required.|
|Dust hazard created by tile and slate cutting (e.g. asbestos dust in old cement fibre type slate).||Minimal risk when drilling for slate application. See: HSE Instructions.|
|Roof access ladders required. Access to the roof with ladders is often difficult, damaging or simply not possible.||No ladders required, Limpet base plates can be used to support timber rails during install avoiding damage to slate and tiles.|
|Removal of array at end of life or for roof works etc will involve major slate replacement and the clipping and strapping of the replacement slates.||No slate removal/replacements necessary.|