Energy Efficiency Factsheets

Our factsheets are here to increase your knowledge on energy efficiency, advising you on the costs and annual savings of home improvements, whilst demonstrating the annual carbon savings. We also aim to simplify the process of retrofit by offering helpful advice on making home improvements.

A line drawing of two people in safety gear installing solar panels on a roof.

Photovoltaic (PV) panels convert energy from the sun into electricity by means of PV cells. If your roof is suitable you may be able to generate your own electricity to use in your home and sell back to the grid.

Download Factsheet
Line art illustration of a person wearing a helmet and face mask, kneeling and rolling out a roll of insulation.

Homes with a room-in-roof (RiR) can be very cold in winter and can overheat in summer. Insulating will make the space more comfortable year-round.

Download Factsheet
Drawing of a person wearing glasses and a cap installing insulation.

Insulating your loft is one of the most cost-effective ways to keep your household heat in. Without it, your roof is letting up to 25% of household heat escape.

Download Factsheet
Line drawing of two people kneeling on the ground installing an air source heat pump.

Replacing your electric or solid fuel boiler with a Heat Pump can be one of the most effective ways to de-carbonise your heating system. The savings you could make depend on your home and your current heating system.

Download Factsheet
An outline drawing of a person wearing a mask installing underfloor or loft insulation.

Floor insulation is effective, but the type of insulation varies from home to home. Find out whether your property is suited to solid floor insulation or suspended floor insulation.

Download Factsheet
Line drawing of somebody installing cavity wall insulation.

Cavity walls are made of two layers of brick or blockwork with a gap in between. Blowing insulation into this gap can reduce heat loss through the walls.

Download Factsheet
Solid Wall Insulation

A lot of heat escapes through uninsulated solid walls - generally around half of the heat is lost from the house! Solid Wall Insulation mitigates this.

Download Factsheet