Business energy just got easier

Use the slider below to find your annual spend and we'll take you to the right part of the site for your business. Or, maybe you're interested in generating energy?

Go I don't know my annual spend

Ok, so you don't know your annual spend, which business is most like yours?

Finding your account number

Your account number is the 9 digit number on the left of your bill.

How do I find out?

Lofts and converted lofts are excluded – they are considered as roof space. Basements and ground floors built into a slope are included if they have an entire wall exposed to the air.

Brick Cavity Wall

Homes where the bricks are all laid in the same direction (see image 1) tend to have cavity walls. Cavity walls tend to be at least 280mm wide (see image 2) and are unlikely to be less than 250mm. The age of a house is another cavity wall clue. If it was built after 1920 (indicated by windows which are wider than they are tall - see image3), it probably has a cavity wall.

Solid Walls

Solid walls will either be constructed of bricks or regular stone blocks (rather than randomly shaped stone cladding – see Random Stone). In a solid brick wall, some of the bricks are laid across the wall, to give it strength. Consequently the ends of the cross laid bricks are visible (see images 4 to 5) and not just the long side of the brick. Measured at the door or window (see Image 2), solid brick walls tend to be about 230mm thick. Solid Stone walls tend to be over 300mm thick.

Random Stone and Concrete Panel Cavity Walls

Random Stone walls (see image 6) are cavity walls where the outer layer is constructed from randomly shaped stone cladding rather than bricks. Cement is largely absent from Concrete Panel walls which are constructed from preformed concrete sections (see image 7).

How do I find out?

The Cavity Insulation Guarantee Agency (CIGA) has insured cavity wall insulation work since 1995. Phone CIGA on 01525 853 300 to find out if your home has guaranteed cavity wall insulation or use an alternative provider. Another way to tell if you have cavity wall insulation is to look for a regular pattern of drill holes in your cavity wall.