Bricks & blocks are very bad for construction as they weight a lot and has too much heat transfer

Not sure there is a specific instrument to measure thermal properties of blocks or bricks etc. Usually one measures the heat conductivity of non-metallic solids by enclosing the specimen in a thermally insulated housing and them heating one end and measuring the rise in temperature of the cold end. When both ends reach the same temperature there is now a steady state between the two ends and the time 't' for the steady state to be reached gives the material its thermal conductivity. Clearly different materials have different thermal conductivities.

Barrie Charles Blake-Coleman Thank you so much