Cavity wall insulation.
Enjoy a warmer home this winter
Which style of brick do you have?
A cavity wall has an air gap or cavity between two brick layers.
Cavity walls are normally suitable for insulation.
Insulating this is the best way to reduce your homes heat loss.
Heat loss through the walls.
The majority of your homes heat is lost through the walls, 35% is lost through uninsulated cavities.
This wasted heat means you are spending more on energy than you need.
You save between £100-£350 off your energy bills.
Your home carbon footprint is reduced.
Not only will your home be warmer in winter, it will stay cooler in summer.
Installation of cavity wall insulation is a simple process. Small holes are drilled in between the mortar joints and a material is blown into the walls. The holes are repaired afterwards and all mess cleared away.
The process takes less than a day and the benefits can be enjoyed immediately.
Cavity wall insulation
A third of all of a homes heat loss is through uninsulated cavity walls. Heat will always want to flow from a warm area to a cold one. During the cold months your homes heat flows to the colder outside, meaning you are heating your home more than you need to.
Most houses built from 1995 onwards should have cavity wall insulation and in 2006 it became UK construction regulation. If your house is older than 1995 it may not have any wall insulation. If this is the case then you are heating your home and excess heat is escaping to the outside rather than just heating your home. If you have a typical house with cavity walls massive energy savings can be realised by insulting your walls.
The first thing to do is establish what type of walls you have.
A cavity wall is built of two walls with a gap in between, known as the cavity.
A solid wall has no cavity.
Working out your wall type.
If your house was built after 1900 it is likely to have cavity walls. Houses built prior to 1900 are likely to have solid walls.
Cavity wall - houses built after 1900 with a brick pattern like shown above would normally be a cavity wall.
Typical solid wall - houses build pre 1900 with a brick pattern like shown above will probably be solid wall.
If the brickwork has been covered by render measuring the width of the wall, between a door or window, can reveal your construction type. If a brick wall is more than 260mm thick then it probably is of cavity wall construction.
Alternative construction, system built properties.
Some homes have a steel or timber frame. These properties would not be suitable for cavity wall insulation. Alternative insulation techniques are available and we can advise you on these.
Cavity wall insulation
If your home was built after 1900, the chances are your home is of cavity construction.
Cavity wall insulation fills that gap and by doing this, keeps the warmth in to save energy. It can also help reduce condensation inside the house if this is a problem.
Is Cavity wall insulation suitable for your home?
Your home will usually be suitable for cavity wall insulation if it meets these criteria:
Its external walls are unfilled cavity walls.
Your cavity is at least 49mm wide and with a maximum of 100mm.
The brickwork of your property is in good condition.
The walls are not exposed to driving rain. (West country)
How is my insulation installed?
Cavity wall insulation is blown into the cavity normally from the outside of a home. Every part of the wall is filled with insulation.
What if your house is damp?
If you have any major damp on your internal walls then we advise speaking to a builder who specialises in damp prevention prior to installation. Minor damp/surface damp should not pose an issue.
How is insulation installed?
To insulate your cavity walls small holes are drilled at intervals of around 1.5m in the outside wall of your home. Insulation is then blown into the cavity using special equipment. Once all the insulation is installed making good is performed so you'll barely notice the holes.
What is the insulation made of?
Cavity wall insulation can be made from two types of material: mineral wool or therma bead.
Both are manufactured according to British standards. All materials used are British Board of Agrément approved and all works carry a CIGA (cavity insulation guarantee agency) 25-year guarantee. We mainly recommend the mineral wool, knauf supafill, a technical specification is available upon request.