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Should You Choose Internal Or External Wall Insulation?

Should you choose Internal or External Wall Insulation?

One of the biggest problems that homeowners face is increasing energy bills as a result of not having the correct insulation installed in their home. While many might think that the walls and current structure will be enough to retain heat, this is not the case. Without insulation, your property could be listing vast amounts of heat and that means that you have to spend more to keep your property warm, leading to an increase in bills.

However, if your home has solid walls instead of cavity walls then it is going to be losing even more heat and costing you more money, therefore, it makes sense to have the walls insulated. It is more expensive to have solid walls insulated than cavity walls but there are grants available to take advantage of that can help to bring the cost down.

It’s possible to insulate solid walls by opting for internal insulation or external insulation and both methods will help you to reduce the amount of energy you use. Despite this, they will both come with their own advantages and disadvantages. Regardless of whether you choose internal or external insulation, you will need to make sure that any problems are sorted out beforehand. This can include the likes of rising or penetrating damp, however, how do you know which option is right for you?

Internal Wall Insulation

If you opt for internal wall insulation, this will involve having rigid boards fitted to the walls or having a separate stud wall put in place that can help to create a cavity that can be filled with mineral wool fibre.

The Advantages

This is commonly known to be cheaper than external insulation and that means that grant funding will cover more of the cost.

It will also mean that the external appearance of your property will remain unchanged and that is crucial for older, period properties. It is also suitable for those properties in Conservation Areas as there are strict rules in place that stipulate what can and cannot be done to the external appearance of your home.

It is a lot easier to install and will reduce the need for scaffolding, making it quicker, while it is also more suited for flats and maisonettes as it is not possible to use external insulation in one block.

The Disadvantages

If you opt for internal insulation then it will reduce the size of your rooms by as much as 4 inches which is a considerable amount.

Furthermore, it is disruptive to install as it will mean that all radiators, carpets, skirting boards, switches and sockets will need to be moved and refitted. Along with this, should you have any period features fitted in your home, they might be covered up during the installation.

External Wall Insulation

This will involve the installation of insulating material that is fixed to the wall using both adhesive and mechanical fixings. The insulation is then covered with protective layers of render or cladding such as brick effect, with cladding costing more than render.

The Advantages

This is the less disruptive of the two as the installers will carry out all of their work outside, leaving the inside of your property free.

You can opt to enhance the external appearance of your property by choosing a finish that you want. If you opt for cladding, which is more expensive then you will find that there are more options available.

Unlike internal insulation, you will not lose any space in any of your rooms while your home will benefit from being more weatherproof and soundproof.

The Disadvantages

In contrast to internal insulation, it is the more expensive option which means that grants are not likely to cover a large percentage of the cost, which means that you will need to pay more.

If you have a period property or a property with character then it will change the appearance of your home, although it might be unsuitable in the first place.

In some instances, you might be required to obtain planning permission which might not be possible in the case of listed buildings.

Final Thoughts

In the majority of cases, external insulation is the better choice because it is easier, less disruptive and means that you can save space. However, one is not better than the other as both can bring excellent savings and better energy efficiency. However, with space constraints taken into consideration, it is possible to achieve a higher level of thermal efficiency with external wall insulation.

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