As building regulations are becoming more stringent, Thermal Block is being used more frequently. It is likely to be found in post 1960’s buildings making up the inner skin of the walls. The block's thermal and acoustic properties derive from the mix of (power station) ash, sand and cement. Due to its "crumbly" nature, anchors have been developed specifically for Thermal Block and are designed to grip the material much more efficiently than standard wall plugs. Thermal Block can easily be drilled into using a HSS drill bit, making it easy to distinguish from solid concrete block ("breezeblock") which requires a masonry drill bit. Unique & Innovative Anchors The problem: "how do I know I have Thermal Block & what anchor should I use" The Solution: 1.Drill a pilot hole with HSS bit provided Tip: If it doesn't penetrate the wall it's concrete or brick & not Thermal Block 2.Insert Plasplugs Thermal Block anchor using Power-Driver     THERMAL BLOCK ANCHORS This plug cuts its own thread in Thermal Block. To give a superior grip within the “crumbly” material.       SCREW = No.8 (1/8") DRILL =3/8"       HOLLOW BLOCK ANCHORS Universal anchor for all types of solid and hollow blocks, it twists into a knot to form a secure anchor.       SCREW = No.8 (1/8") DRILL = 3/8"