The versatility and durability of slate as a material for roofing was established nearly 1000 years ago. Slate as a building material is mentioned in the Doomsday Book of 1086. Slate was quarried in Scotland from the 15th century and the industry reached it's high in 1900 at 45 million slates per annum. By 1966, the last documentation from the indigenous quarries reported a return of 5 tonnes.
Spanish slate has been entering the Scottish market from the late 1800s. Due to the demise of the Scottish quarries, Spain has taken over as principal supplier and is currently the undisputed market leader in the production of natural slate; accounting for 80% of the slate sold worldwide. BARLOSA is extracted using the environmentally friendly technique of diamond wire. This virtually eliminates the necessity for destructive explosive, thus giving far more usable material.
The BARLOSA quarry is situated in Marrubio in La Cabrera, one of the best and more prestigious areas for natural slate in Spain. It is the original site of the La Baña quarry, which is very highly regarded within the UK and was re-opened in 2008 by Pizarras barreda Lopez e hijos S.L. who are supplying the market with slate under the commercial name of BARLOSA.
Natural slate is the most durable roofing material available. It is unaffected by weather, acid rain or extremes in temperature. It is unaffected by UV radiation, is non combustible, is resistant to acid or alkali attack and impermeable to water.
BARLOSA is characteristically a beautiful blue/black, pyrite free, heavy slate. It is smooth on the back, with a rough surface that is typical to indigenous, Scottish Ballachulish slate which has not been produced for over 50 years. BARLOSA will produce a roof that gives your project a beautiful and permanent finish that will remain unchanged for many years to come.
BARLOSA slate is tested to and has passed the most stringent of tests in Europe. It carries the European Standard BS EN12326 CE mark; the British Standard BS680 Part 2; the French NF228-02/01/01; the Belgian ATG H571 and the CE-marking where it got the highest achievable results of T1 (for Durability to Thermal Cycling) , A1 (for low Water Absorption)and S1 (Durability to Sulphur Dioxide Exposure).
BARLOSA carries a 100 year quarry backed guarantee, for additional peace of mind for roofing contractors, developers, specifiers and home owners. The product is used widely across Scotland and is available in a variety of sizes from 350mm x 200mm (14 x 8) to 500mm x 250mm (20 x 10).