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Guardian Synthetic Slate Roof Tiles 445mm x 294mm - Pack of 22

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£52.20 Incl. VAT
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Available in five natural colours, Guardian synthetic slate is a lightweight natural slate alternative with no risk of cracking and breaking. The colours have been tested to high UV exposure and exhibit virtually no fade and with no trace of cracking or splitting.

Guardian slate is 100% recyclable at end of use and is 60% lighter and manufactured at a lower cost than traditional slate. With consistent high quality and dimensional accuracy, these tiles are pre-marked with fixing guides to make installation quick and easy.


  • Costs less than original slate.
  • Spacers on tile for perfect alignment.
  • Pre-marked with fixing guides for quick and easy installation.
  • Up to 60% lighter than traditional slate.
  • Superior life expectancy.
  • Will not crack or break.
  • Idea for new or replacement roofing projects.
  • 100% recyclable at end of use.
  • A Grade fire rated on a standard membrane.
  • Fine-toothed handsaw, jigsaw, circular saw, or sharp utility blade
  • Consistent high quality and dimensional accuracy.


  • Construction: Manufactured from resin bonded crushed limestone
  • Size (slate): 445 x 294mm
  • (ridgecap): 150 x 445mm
  • Weight (slate): 0.675 kgs (nominal)
  • (ridge cap): 0.620 kgs (nominal)
  • Ridge: 5.5 per linear metre
  • Hip: 5.5 to 6.5 per linear metre
  • (depending on gauge)
  • Packaging: 22 slates per bundle (14.85 kg) / 1584 slates per pallet (1.04 tonne)
  • Roofing board: 12mm or standard roofing batten
  • Fixing: Two 30mm x 4mm head stainless steel screws
  • Maximum pitch: 90°
  • Minimum pitch: 14°
  • Storage: Must be stored above 7°C for 24 hours before use
  • Can be installed at 0°C but must be hand fastened
  • Limited lifetime

Roof Pitch Gauge Slates per m2

  • 14 to 22.5 degrees (boarded only) 152mm 22
  • 22.5 to 25 degrees (boarded or battens) 152mm 22
  • 25 to 27.5 degrees (boarded or battens) 165mm 20
  • 27.5 to 30 degrees (boarded or battens) 178mm 19
  • Above 30 degrees (boarded or battens) 191mm 18

Delivery Notes - Our slates are typically delivered on a six-wheeled lorry (11m long & 2.4m wide) with a tail-lift facility to offload on solid, level ground with a pump truck.
Non-compliance to delivery restrictions may result in additional delivery charges. Should you specifically require a crane or small vehicle offload, please notify us at the time of placing the order, as an additional charge may be incurred. Please allow 5% extra in the ordered quantity to cover acceptable breakage in transporting natural slate products


Length 445mm Width 294mm


Colour Black
Material Limestone Slate Minimum Pitch 14 Degrees Maximum Pitch 90 Degrees


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Questions & Answers


Can you tell me the weight per tile grams or Kgs


  • Weight (slate): 0.675 kgs (nominal)
  • Packaging: 22 slates per bundle (14.85 kg) / 1584 slates per pallet (1.04 tonne)


How many box’s do I need for 17m2


The coverage does vary depening on the pitch. 

  • 14 to 22.5 degrees (boarded only) x 22
  • 22.5 to 25 degrees (boarded or battens) x 22
  • 25 to 27.5 degrees (boarded or battens) x 20
  • 27.5 to 30 degrees (boarded or battens) x 19
  • Above 30 degrees (boarded or battens) x 18


Do I need a tile and halve with these tiles?


They do not provide slate and half with these man made ones so you need to cut ones down on site to create the broken bond effect when installing.

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4 / 5 1 reviews
Reviewing Guardian Grey Synthetic Slate Roof Tiles 445mm x 294mm - Pack of 22
30th May 2020
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Guardian Synthetic Slate Roof Tiles 445mm x 294mm - Pack of 22

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