Cost of injecting walls

Want to stop rising damp? Then having your walls injected is one of the best solutions. Injecting walls has proven itself over the years to such an extent that specialists give a guarantee of up to 10 years or even longer. Renoca has listed all the options and costs for you.

What does it cost to have your walls injected?

For about 8 metres of wall, the cost of having your wall injected is around £800 to £1,500, depending on whether it is internal or external walls. In addition, having a wall injected often also goes hand in hand with repairing the wall, for example the grouting. Jointing repair costs on average £20 per m2. Check out the cost overview below for all price information:

Price examples

A damp-proofing specialist charges an average of £100 per linear metre. Measure how many metres of wall you want to have injected to estimate the average cost in your situation. In the examples below you can read what you can expect for the various jobs.

Minimum

If the damp is only on the outside of your wall and the wall is otherwise in good condition (no broken joints or mould)? Then having your wall injected will cost you around £800.

Average

If you have a cavity wall with rising damp on the outside and inside, you will need to have both sides injected. On average, this project costs £1,500. If you have your inner wall injected, it is useful to know that it must first dry properly before you can paint or wallpaper the walls, for example.

Extended

Are your walls damaged, e.g. broken joints? Then your walls need to be repaired before injecting begins. If you don’t do this, moisture will still be able to find its way inside via the damage. Having your wall repaired and injected against damp will cost an average of £2,200.

How are the costs for injecting walls structured?

Injecting a wall is craftsmanship and is done with professional materials and tools, such as a compressor to inject the gel into the walls under high pressure. It is therefore advisable to have your walls injected by a specialist for the very best results.

Choices that affect the price of wall injection

The price will be determined by the following choices, which are partly in your own hands.

Choice 1: Have a moisture measurement done

Please have a moisture measurement done beforehand to check whether it is really necessary to inject your walls. Also have this moisture measurement done afterwards to check if your walls are completely moisture-free. Many specialists offer this service free of charge, others charge a small fee; on average £50. Ask your specialist about the possibilities. A moisture measurement also allows a specialist to determine more precisely what the estimated cost of injecting your walls will be.

Choice 2: Remove mould

Did the moisture in your wall cause mould to develop? Light superficial mould you can remove yourself. A bottle of pesticide will cost you around £15. For persistent mould, it is advisable to have a professional look at it. It is important to remove mould properly as it is bad for your health and the indoor climate of your home.

Choice 3: Repair your walls

Is the pointing of your walls in bad shape? Then make sure you have it repaired before injecting begins. This is for the injection to work optimally. This is because moisture easily manages to find its way through cracks and crevices in the grouting. The costs for jointing are on average between £ 18 – £ 23 per m2.

Choice 4: The finish

It is important to let your wall dry properly after injecting, which takes 6 to 12 months on average. A mnemonic to determine the drying time is to divide the thickness of your wall by 2. When your interior wall has been injected, only after this period do you start finishing your walls, such as painting or wallpapering. Do you want to have this done properly? Then opt for a professional; a painter costs an average of £35 an hour.

Don’t feel like looking at an unfinished wall for 6 to 12 months? Then have a salt and moisture-resistant membrane placed between the wall and the finish. This will cost you around £20 per m2 and then you can start finishing immediately.