Intro: Berwyn Welsh Slate (N4)
Reference N4 NAME Berwyn (honed) TYPE Slate GEOLOGY Silurian. Ludlow Beds COUNTY Clywd COLOUR Deep blue TEXTURE Extremely fine grained. Finely cleaved BLOCK SIZE LXBXH (mm) 2500x1500x75mm SUITABILITY Roofing, cladding, paving, cills, copings and fireplaces USES (1) USES (2) USES (3) USES (4) Stone Names