Riverstone Ultra grade
Riverstone is the diamond of natural roofing slate. SSQ’s signature slate is not actually slate, it is phyllite. Harder, denser and stronger than slate, phyllite is a perfect stone for any design challenge or artistic feature.
SSQ Riverstone Ultra is a premium-quality roofing slate produced exclusively by SSQ. Riverstone is a phyllite - a rock similar to slate, sharing its essential characteristics but surpassing its qualities - taken from SSQ’s own quarry in the San Luis region of Central Argentina.
In addition to passing SSQ’s own, rigorous quality control tests, SSQ Riverstone Ultra grey roofing slate has been tested in accordance with EN 12326, carries the CE marking and is classified as ‘W1-T1-S1’.
SSQ Riverstone has been accepted by Historic England and Historic Scotland as an alternative to indigenous slates for use on restoration projects or within conservation areas.
Riverstone roofing slate has a medium-grey colour and is similar to indigenous slate found in South-West England and Norway. The colour is totally natural and will not fade, even in the strongest sunlight or harshest environments.
SSQ Riverstone Ultra roofing slate is covered by a 100-year guarantee.