Saving serious money on your energy bills doesn’t just depend on having an efficient heating system – it means making sure your insulation works hard too. Whatever the age of your home, whatever type of insulation you need, 2 RED can help.


On average, 25% of domestic heat escapes through the loft – yet insulation is a simple, effective way to keep your house warm and reduce your bills.

The process involves lining the space between the roof joists with either a glass mineral wool insulation rolled out in layers or by loose material blown directly into the roof space to a depth of 270mm. Loft insulation is effective for at least 42 years, so will pay for itself over and over again.

How much could you save?

Reducing heat loss by up to 25% through insulation can also help reduce heating bills by up to £240 per year. And using less fuel to heat up your home also reduces your CO2 emissions.

  Loft Insulation (0 to 270mm) Loft Insulation (100 to 270mm)
Approximate savings per year (£/year) Up to £240 Up to £25
Typical Installation Cost Around £395 Up to £310
Carbon Dioxide saving per year Around 990kg Around 95kg

These are estimates based on insulating a gas-heated home with either a totally un-insulated loft, or topping up existing insulation from 100mm to 270mm. (The recommended depth for mineral wool insulation is 270mm but other materials need different depths.) 31/03/15

Loft insulation benefits

  • Gives your home a high level of thermal insulation.
  • Helps reduce fuel bills by up to £240 per year.
  • Reduces heat loss through the roof by up to 25%.
  • Reduces the level of CO2 released into the atmosphere by up to 990kg.
  • Quick and easy to install.
  • A cost-effective way of insulating your home.
  • No maintenance needed.
  • All products BBA (British Board of Agrément) approved.


If your home was built after 1920, chances are its external walls have two layers of masonry with a gap or cavity between them. Cavity Wall Insulation injects an insulating material into the space between the outer and inner brick/block work.

Around 35% of domestic heat is lost through the walls, and cavity wall insulation is an effective way to keep the warmth in – and can help reduce condensation inside the house.

How much could you save?

According to The Energy Saving Trust, home heating bills can be cut by around £275 per year by installing cavity wall insulation, with around 1100kg less CO2 being emitted into the atmosphere.

These are estimated figures based on insulating a gas heated home. Source 31/03/15

Cavity Wall Insulation benefits

  • Makes your home warmer in winter and cooler in summer.
  • Helps reduce fuel bills by up to £275 per year.
  • Can help reduce condensation and black mould growth.
  • Reduces the level of CO2 emitted into the atmosphere.
  • No disruption inside your house during installation.
  • No maintenance needed.
  • All systems BBA (British Board of Agrément) approved.
  • A range of different systems available.


If your house was built before 1920, its external walls are most likely solid rather than cavity. Over seven million homes in the UK have solid walls, and while they may have a distinctive character and charm they’re less thermally efficient than modern houses proving very costly to heat during winter.

While insulating solid walls is more costly than cavity walls, the savings are also bigger.

How much could you save?

  Internal Wall Insulation External Wall Insulation
Approximate savings per year (£/year) £455 £455
Installation Cost* £3,000 - £14,000 £5,000 - £18,000
Carbon Dioxide saving per year Around 1900kg Around 1900kg

Estimates based on insulating a gas-heated home. Source 31/03/15
*Costs may vary significantly depending on level of work required.

Internal Wall Insulation

This usually involves fixing timber or metal studding filled with insulation material and lining the facing with a vapour control layer and plasterboard. Alternatives include thermal laminate plasterboards fixed to the wall.

Insulating internally will improve the thermal efficiency of the wall without affecting the external appearance of your home.

External Wall Insulation

This is a layer of insulation material fixed to the wall, covered with a special render or cladding. The finish can be smooth, textured, painted, tiled, paneled, pebble dashed or finished with brick slips.

External insulation systems not only effectively improve the thermal performance but can also radically improve a property’s appearance.

Solid Wall Insulation benefits
This is one of the most effective home improvements to reduce your heating bills and make your home a lot warmer.

  • A high level of thermal insulation.
  • Can reduce heat loss by up to 35%.
  • Can reduce fuel bills.
  • Can reduce condensation and black mould growth.
  • Improves sound insulation.
  • Long term durability and virtually maintenance-free.
  • BBA (British Board of Agrément) approved.


Insulating suspended timber floors provide an effective means of insulating your home in addition to walls and the loft. Very often ground floors are above an unheated space and so through providing effective insulation will help minimize heat loss through the floor.

Generally older homes are more likely to have suspended timber floors. These can be insulated by lifting the floorboards or a section of boards to gain access and laying mineral wool insulation between the joists supported by netting underneath.

How much could you save?

Insulating your floor can be a cost-effective energy saving measure to do to your home. This simple method of improving the thermal efficiency of your home and reducing heat loss can help reduce your heating bills by up to £95 per year. Furthermore, by using less fuel to heat up your home it is also reducing the amount of CO2 emissions into the atmosphere.

  Detached Semi detached Bungalow
Approximate annual saving £75 - £95 £45 - £55 £65 - £85
Carbon dioxide (CO2) saving per year 320kg - 380kg 190kg - 230kg 280kg - 340kg
Approximate Installation cost* £300 - £750 £300 - £750 £300 - £750

The savings presented are for typical gas heated homes. *Costs are illustrative and will vary significantly depending on the level of work needed.Source 31/03/15

Benefits of Insulated your Floor

  • Provides a high level of thermal insulation to your home.
  • Can help reduce fuel bills by up to £95 per year.
  • Helps improve the environment by reducing the level of CO2 into the atmosphere by up to 380kg.
  • Can be quick and simple to install.
  • A cost effective means of thermally insulating your home.
  • Requires no maintenance after being installed.
  • All products are BBA (British Board of Agrément) approved.