Why is it unique?

Low Pitch

Lightweight slate roof

Natural slate

Modern slate roof

Lowest pitch for slate roof
As low as 10° pitch

Excellent kerbside appeal
Low pitch slate roof with the appearance of a traditional slate 

Extremely high performance
Weather tested to natural slate minimum pitch of 10°
(5-7mm slate thickness)

Lightweight slate roof tiles 
ArmouredSlate roof 20kg/m²
Average slate roof 36kg/m²

Fire tested slate roof
Confirms to  Broof(t4) fire test classification

Easy to install
Using tried and tested materials

Fully tested at the BRE

✓ Achieves Broof(t4) classification 

✓ Weather resistance tested with high performance - learn more

Outstanding weatherproofing performance as low as 7.5° pitch on wind driven rain tests. When tested against BS PD CEN/TR 15601 it was shown that the ArmouredSlate far outperformed any other natural slate roofing system available. 

Read the full case study on our testing with the BRE here:

Mayan Case Study 

How does it work?

Specially formed, patented GRP plate replaces the double lap normally required in standard slating. The ArmouredSlate GRP plate is easily placed over the batten to enable resilient and completely weatherproof single lap slating for low pitch.

The design incorporates a weather seal to prevent rain blowing under the slates, the weathering bar then prevents any wind or capillary driven rain from tracking up the slate. The GRP plate fits perfectly below the slates, offering total protection against the very worst of the elements.
See the full installation guide here:  Installation guide
*ArmouredSlate is colour matched to the slates in Squirrel Grey, the white in the illustration is only to show how it works.

ArmouredSlate can be purchased as a full system, or separately.

Slate Size - 220 x 320mm and 330 x 320mm

The Armouredslate GRP plate is provided in 1500 mm lengths with pre-applied lap tape for super-easy installation. 

18.88 slates / m² @ 240mm batten gauge
4.54 linear m of ArmouredSlate per m²

Fixing options

Slatefix Screws


To secure the slates at the head, verge and ridge when using the ArmouredSlate system.

Stainless steel low profile screw

Size: 30mm x 4mm

Slate Hook

Slate Hooks

Stainless steel spike 

Size: 80mm x 2.75mm

Copper Disc Rivet

Copper Disc rivets

Optional fixing for securing ArmouredSlate system


ArmouredSlate Installation Guide

ArmouredSlate Data Sheet

Our technology - Single lap slate system

Our modern slate roof system was developed utilising our wealth of over 40+ years of knowledge and experience in roofing. 

ArmouredSlate is made from well-known, tried and tested GRP, that has been used for over 40 years in roofing applications with consistent high-performance, long life and stability.

The GRP plate is positioned just below the slates to provide a resilient and completely waterproof layer, offering total protection against the very worst of the elements.

Armouredslate Closeup

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