Montegris Phyllite: Superb Performance, Competitive Prices

Montegris is a stunning Argentinian phyllite that can offer decades of superb performance for roofing, cladding and flooring – all while being priced more competitively than many other phyllite products on the market today.

Features & Benefits:
• Colour: Grey
• Material: Phyllite
• Extremely weather resistant
• Sourced from Argentina
• Non-combustible
• Denser than most stones
• 30-75 year weather tightness guarantee

Certification:
• BS EN 12326 – W1-T1-S1

The Montegris Guarantee

You should never have to bear any risk when you’re choosing what to put on your roof. If you can’t rely on the roof over your head, what can you rely on?

That’s why, at SSQ, we guarantee our Montegris roofs with a 30-75 year weather tightness – letting you sit back and enjoy a pristine slate for three-quarters of a century.

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Making excellence accessible

At SSQ, over decades, we’ve established Riverstone as one of the leading phyllite brands in the world.

We’re incredibly proud of that legacy of excellence, and the thousands of projects and developments it’s been used on around the world.

But for many years, we’ve also wanted to offer the many benefits of phyllite at a more accessible price point too.
With Montegris, that’s exactly what we’re now able to do.

Get a free quote

Why Choose Montegris?

Montegris offers the same exceptional performance that’s made phyllite one of the world’s most sought-after natural constructional materials.

In particular, it provides exceptional durability and extremely low water absorption.

What’s more, it achieves the highest possible classification in BS EN 12326 – W1-T1-S1.

Contact Us
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  • Discuss Your Project
  • Request a Sample
  • Booking a CPD
  • Resources
  • Discuss Your Project

    Discuss Your Project

    Just fill in the form below, and a member of our experienced team will be in touch. Please feel free to give as much detail as you need, and include any design or technical questions you have.

     

    Request a Sample

    Request a Sample

    The best way of judging the quality of slate and phyllite is to hold it in your hands, and examine it in detail for yourself.
    If you’d like a sample of any of the products we provide, don’t hesitate to fill in the form below.

    Check which samples you would like to receive:
     

    Booking a CPD

    Book a CPD

    At SSQ, we love sharing our decades of natural slate expertise with architects, and our CPDs are always extremely popular.
    On our RIBA-approved Why Specify Slate CPD, you’ll learn about:

    • How to guarantee a perfect slate roof
    • The secret to specifying
    • Unusual roof designs
    • How to avoid specifying defective slate
    • The difference between CE tested and true quality slate
    • The legal requirements when it comes to specifying slate
    • How to specify random coursed roofing slates
    • The difference between hook and nail fixing
    • The environmental benefits of natural slate
    • Specifying heritage roofing slates

    … and a whole lot more.

    If you’re interested in booking a place on our next CPD, simply fill in this form.

    Resources

    SSQ Professional Resource Centre

    When you work with SSQ, you get so much more than world-class slate and architectural stone.
    Over the last forty years, we’ve built up a huge amount of expertise covering natural slate, roofing, geology, specifications and so much more – and you can benefit from that, along with case studies, CAD drawings, technical PDFS and a wealth of other support, on our Professional Resources centre.

    Get free access
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    Testimonials

    It was an absolute pleasure to meet you today, and I just wanted to take a moment to thank you for your time and a wonderfully informative CPD.

    The whole team really enjoyed it, and you definitely conveyed your passion and knowledge of your products!

    I would say I will keep SSQ in mind for future projects, but they always have been. However, I have definitely left with a need to utilise more slate in my design work!

    Michael Clifton BSc ACIAT - Oakbridge Bespoke Homes Ltd

    Testimonials

    Everyone liked Sarria: the client was delighted with its appearance and its consistency made it easy to cut and lay.

    Gary Lambert, Complete Roofing Contractors

    Testimonials

    Working in a conservation area brings a special responsibility. SSQ Riverstone slate fits perfectly, its tone and texture blending seamlessly with its surroundings.

    Joan Kinane, Architect

    Testimonials

    We specified SSQ First Domiz Blue-grey roofing slate for both technical and aesthetic reasons:its strength and quality gives the performance needed and its cold, hard, colour provides a dramatic foil to the rich warmth of the western red cedar walls.

    Mark Webber, Architect, Nichols Brown Webber

    Testimonials

    SSQ Matacouta slate was chosen as the most sympathetic option. Its consistency and competitive price make it a clear winner over indigenous slates.

    Historic Scotland

    Testimonials

    Being both high quality and cost-effective, Matacouta slate from SSQ is proving very popular with specifiers and contractors alike for refurbishment as well as for new build projects.

    Mr Roy Clark, Baxter Clark and Paul

    Testimonials

    With the roofs being such a visible feature, the choice of roofing slate was a significant decision. We involved the roofing contractor at an early stage in the selection process and they recommended SSQ’s Del Carmen Blue-black slates. Although it’s not an indigenous slate, it is an excellent match for the originals and, having used Spanish slate on other projects, we know the quality is there.

    Richard Thorpe, Ridge and Partners LLP

    Testimonials

    We put forward Riverstone as a cost-effective, yet high quality alternative to Welsh Slate, and it was accepted on that basis. The refurbishment work has now been completed and both the owners and ourselves are very happy with the result.

    Keith Hicks Architect at Pave Hall

    Testimonials

    The quality and strength were there, the colour was similar to indigenous Welsh slate and its ‘traditional’ look was in keeping with the surrounding community. In fact, as I had used it on my own Edwardian house, I knew it was a good slate!

    Julian Bohling, OSP Architecture

    Testimonials

    It is a very attractive development and we needed something equally attractive and of equally high quality for the roofing material. SSQ Del Carmen slate is top quality, and we liked the colour and texture. What’s more, it is very good value. I’d have no hesitation choosing it again.

    Mr Keith Wills, Clancy's Building Manager

    Testimonials

    With so many ‘interested parties’ the local planners set their minds on a natural slate roof at a very early stage of the project and, from this starting point, we needed something that would satisfy a number of technical and aesthetic requirements – SSQ Domiz blue-grey, was the one chosen for use to compliment the local ‘Shere Green’ colour.

    Ben Hunt, Total Project Integration

    Testimonials

    SSQ Ultra Del Carmen slates come with a 75-year guarantee and that was important. Not only that, the on-site services promised – and delivered – by SSQ enabled a smooth and easy workflow.

    Stuart Howes, Architect

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    Case Study

    In with the new: SSQ’s Del Carmen restores Southampton University library

    Read more View all case studies

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    Millbridge Primary School

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    Christ’s College

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    Kresen Kernow

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    Case Study

    Broad Meadow

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