National Green Specification

About us

Green Building Calculator GBC Version 1 provided information regarding whole building Energy Consumption, Carbon in use, Cost of building and Cost of heating a building.

It is an impartial, easy to use, value for money product that can make a real difference to the world around us.

GBC V2 includes carbon footprint calculator for homes and non-domestic buildings
It is aimed at architects and interior designers but useful for all designer disciplines, self builders and constructors.

Different building shapes, methods of construction, materials choices and resultant energy demand and consumption can be compared easily.

With XR Extinction Rebellion, Greta Thunberg’s behaviour change campaign, Architects Declare and Architects Climate Action Network, as well as Government bodies declaring and becoming involved in environmental design in a bigger way, architects and other professionals now have a quick way of creating greener buildings or easing their way into the ‘New Normal’.

Moreover, they will understand why 50mm of stone wool insulation, shown in the ageing textbooks, is no longer enough and sometimes has the wrong properties for the application.