What Is Slate?

Slate is a fine-grained homogeneous sedimentary rock composed of clay or volcanic ash which has been metamorphosed (foliated) in layers (bedded deposits). Slate can be made into roofing shingles ('roofing slates' in the UK) because it has two lines of breakability: cleavage and grain. This makes it possible to split slate into thin sheets.

When choosing roofing materials, one must take into consideration the longevity of the roofing material, as well as the installation cost. Slate roofs have been known to last hundreds of years in comparison to the synthetic roof which typically lasts 10-20 years. Synthetic and manufactured roofing materials may initially save money at the time of installation, but the slate roof will last many lifetimes, making it the more permanent, economical choice.

Why Choose Slate?

Natural slate is still the best and most desirable type of roofing ever known. Even with the advances made in modern building products, roofing slate, when it is properly selected, worked, fashioned and installed, may prove to be the most permanent part of any building.

Slate is a fine grained metamorphic stone formed from clay mud; composed of sediments of decomposed stone and organic matter that has been hardened by heat and pressure. Since the geological process varies greatly, slates range quite a bit in hardness and porosity. Slate characteristics vary with it's country of origin. Slate can be black, green or mottled and is very robust. Many imported slates are available today with wide ranging physical characteristics and overall suitability. The slate differs in density, strength, water resustance and abrasion resistance,which are all factors when deciding on which type of slate you choose for your property.

There are literally hundreds of types of slate to choose from,the most popular slate types originate from Wales (Penrhyn), Canada (Trinity), England (Burlington), Spain (Del Carmen) and China (Duchesses).