Cavity Wall Insulation Problems in UK Homes
The purpose of cavity wall insulation is to keep the house warm. It makes the building comfortable and lowers the energy expenses. In some cases, it’s the opposite. It does not fix the problem but creates issues, such as damp, mould, or cold spots.
Are you facing cavity wall insulation problems? If yes, cavity wall insulation problems can be solved with expert inspection, safe removal, and proper reinstallation for long-lasting comfort. We will provide you with the solution to all the problems with cavity wall insulation. You can also approach us when you need assistance. Scroll down to see the detailed information.
Here, we will define cavity wall insulation. Also, review the various types of cavity wall insulation and common problems with their warning signs.
If damp, mould, or cold spots are affecting your home, you may qualify for a cavity wall insulation grant with S6 Energy to fix the problem affordably.
cavity wall insulation problems
What is Cavity Wall Insulation?
Cavity walls are observed in most houses built after 1920 in the UK. These walls are composed of two brick layers. These are separated by a small hole. This is called a hollow wall between them.
This hole will prevent rainwater from getting inside the wall. Cavity wall insulation refers to filling this gap with insulation. This is foam, mineral wool, or cavity wall insulating bead. It helps to retain warmth in the cold. It enhances energy saving in the home. In this way, your energy bills also decrease.
It also enhances the comfort of the house throughout the year. A cavity wall is effective when properly installed. A problem can arise when the installation is not done well. The walls are not appropriate, or when the wrong material is being used. These problems include structural decay, fungi, and dampness.
Cavity Wall Insulation issues
Cavity Wall Insulation Types
A variety of cavity wall insulation types is applied in UK houses. Every type has its advantages and disadvantages.
Polystyrene Beads
The wall cavity is pumped with little spherical polystyrene cavity wall insulation beads. They can reduce the risk of dampness.
It’s due to their light weight, good insulation, and allowing air to move freely. On the other hand, a wrong installation may lead to holes in the insulation.
Mineral Wool
Mineral wool is a substance that looks like fibres and is blown into the cavity. It is very popular and affordable.
Mineral wool can trap water in areas of high rainfall. The weak external walls bring damp conditions and wet insulation.
Spray Foam
Foam is sprayed directly into the cavity, where it expands to fill it up. It is sometimes seen as inappropriate. But it can be advantageous in cavity wall insulation.
Other Materials
The other insulations include an expanded foam board and a hybrid. They are not as common in standard UK homes.
Cavity Wall Insulation Problems
Problems often occur very rapidly when insulation is placed on the wrong kind of building. Or when the insulating contractor does not work well.
These issues can affect comfort, health, and even the structure of the house. The most frequent issues that cavity wall insulation causes are:
Damp and Dampness
Dampness is one of the most frequent issues around cavity wall insulation. Damp happens when water enters the hole in the outer wall. Instead of being dry, the insulation absorbs the moisture.
Water can seep through the internal wall. Walls may become wet soon, especially in windows, corners, and skirt boards.
Moisture is a big issue. It makes plaster crumble, paint bubble, and wallpaper peel as time passes. What is worse is that it supports the growth of mould very well.
Cold Spots
Another problem is cold areas. They occur when the insulation of the wall cavity is not evenly spread. Gaps are sometimes left during installation. In other instances, the insulation settles slowly or shifts.
The house will grow hot at random places due to this. Certain parts of the wall are hot and cold. Some rooms are never comfy, even when they have the heat turned on.
Also, low temperatures encourage condensation. This increases mould and moisture.
Wet Insulation
Cavity wall insulation must be dry. But the insulation becomes wet because water enters the hollow. This often happens when the house is placed in an open, windy, and rainy location.
Or when exterior walls are damaged or cracked. When insulation is wet, it also becomes ineffective. This means that higher energy bills because wet insulation cannot trap heat in the house.
It also starts to break down and fall apart. Wet insulation is most often removed by hand to prevent additional damage.
Mould Growth
Mould can easily grow on wet walls. Moulds are hazardous to health. It can spread on all windows, walls, and ceilings.
Besides destroying wallpaper and paint, mould has an unpleasant smell. More importantly, the mould may affect your health. It causes asthma, allergies, respiratory disorders, and other diseases.
The most prominent sign that something is wrong is mould and damp in cavity wall insulation.
Structural Damage
Large damage can be caused to the structure if the problem is not fixed soon. Bricks may collapse, plaster may deteriorate. This makes the wall weak after some time and costs more to restore.
The most damaging aspect of improper cavity wall insulation is the structural damage. Besides the appearance, it affects the safety of the home.
Failed Cavity Wall Insulation
Certain forms of insulation naturally weaken with time. Especially in houses located in open sights and exposed to plenty of rain.
It implies that the house is no longer insulated. An improved material should often be installed to replace failed cavity wall insulation.
Cavity damp problem
Suppose you want to install cavity wall insulation or wish to renew your old insulation. Also, with the need for grants for it, you can contact S6Energy. We will provide you with every kind of support and facility you need.
Read More: Cavity wall insulation pros and cons
Signs of Cavity Wall Insulation Issues
Being aware of cavity wall insulation issues is an important step to take. Some of them are:
- Wet walls on the inside of the house
- Bubble in the paint or the cracked wallpaper
- Damp or mouldy smells
- Black moulds
- Cold spots in some rooms
- Unexpectedly very high energy costs
- Cracks within the outside wall or damaged bricks
Consult a professional in case you notice any of the following signs..
Cavity Wall Insulation Removal
The most effective thing you can do is to have insulation removed from your cavity wall. In case it is causing problems. This is called the cavity wall insulation extraction.
Works
First, walls are inspected by a professional. They inspect mould, humidity, etc. Then they use machinery to suck out the old insulation. Once the cavity is filled, you can choose between installing new insulation that suits your home.
Cost of Removal
The price is influenced by a number of factors. It will depend on how big your property is. It also has an impact on the type of insulation used. The cost may rise when there is more damage. It may be hundreds or several thousands, depending on the condition.
Grants for cavity wall
You may get financial help. Government schemes like the Energy Company Obligation (ECO) can help you. This scheme helps with funding. It can reduce the replacement or removal cost.
Cavity Wall Insulation reasons
Final Words
The insulation of cavity walls can be beneficial. It saves energy and keeps the house warm. Yet, wrong installation can cause severe problems. Typical issues are cold spots, mould, and dampness.
In some cases, it can actually damage the structural foundation of the house. If you see danger signs, then react quickly. In some cases, it is better to take out the old insulation. There are also grants that you can use to cover the cost.
You can solve the problems and bring comfort back to your house when you take the right steps.
FAQs
How long does cavity wall insulation last?
An insulation on cavity walls can last 20-25 years. When fitted properly, it may last as long as the house.
Does cavity wall insulation cause dampness?
When properly installed, it should not lead to moisture. Moisture or mould problems might be caused by faulty or improperly installed insulation.
Is cavity wall insulation bad?
Cavity wall insulation is not a bad idea. It saves energy and keeps the house warm.
Is cavity wall insulation worth it?
Yes, it is worthwhile in most homes. It may not only make the house warmer. But it also reduces heating expenses.
How do I know if I have cavity wall insulation?
You can look at the walls. If your house was built after the 1990s, it probably already has it. Otherwise, an installer can drill a small hole in the wall to survey.
How much does cavity wall insulation cost?
It will vary with the size of the house.
