SIGA 150

SIGA 150 has been carefully selected from quarries in Vermont USA to provide additional green slate for the UK market. SIGA 150 achieves Grade 1 certification from the American Society for Testing and Materials (ASTM) with the highest prediction for service life so it will fulfil your technical as well as your aesthetic requirements. Like all Excellence slates it attracts a 75 year Warranty.

Region Used:

Scotland, London, North West, North East, East Midlands, West Midlands, East Anglia, South West

Product Types:

Heritage, Conversion/Refurbishment









Sizes Available:

500 x 250mm, 400 x 300mm, 500 x 380mm, 400 x 200mm *Other sizes may be available to special order. Please contact us for details.


75 Years

Product Specifications


Samples have been tested in accordance with, and comply with, the relevant sections of EN12326-1:2014.

  • Thermal Cycling T1
  • Exposure S02 S1
  • Water Absorption W1 (≤ 0,6%)
  • Meets the requirements of NHBC Standards

Additional Information

SIGA warranties are backed by SIG Roofing, the UK’s largest distributor of roofing materials. The performance of the slate is warranted for the stated period, subject to installation in accordance with prevailing British Standards and good roofing practice.

Registered Office: SIG Trading Limited, Adsetts House, 16 Europa View, Sheffield Business Park, Sheffield, S9 1XH. Registered in England No. 01451007 VAT No. GB 487 01733