Damp proof membrane, or cavity drain membrane, is a quick and easy way to damp proof your home. It can be applied on the inside and outside of your house with little to no surface preparation, which cuts down on installation times.
It’s a great way to fully protect your property from damp, as it can be added after a damp proof course to isolate the new finish from walls that are already damaged by damp. Damp proof membranes could be the answer to your mould and condensation woes, so it’s vital that you find out all you need to know.
What can damp proof membrane be used for?
Damp proof membrane can be used to treat a wide range of problems:
- Prevent damp walls from spreading to other areas
- Prevent salt contamination from spreading
- Provide damp proofing under a new slab
If you’re unsure whether damp proof membrane is right for your property, you should ask your damp proofing professional for advice.
What is damp proofing membrane made of?
Damp proof wall membranes are made from a plastic called HPDE along with other types of plastic. They have a thickness of between 0.5mm and 1mm and have studs on them that can range from 1mm to 8mm in size. When the membrane is laid, it creates a cavity known as the ‘air gap’ which prevents damp from forming. Some damp proofing membranes have a plain finish so they can be used for a floor, or have a mesh welded on them so they can be rendered and plastered over.
Damp proof membrane is strong and durable, and you can expect it to last for over 30 years. It can deal with structural movement, which will increase the length of time that it lasts.
How is damp proofing membrane installed?
Damp proof membrane is easy to install, and if you’re a handy DIY-er you might even feel confident to do it yourself. There are just 5 steps to installing damp proofing membranes:
1. Cut the membrane to size
2. Put the membrane to the wall
3. Fold the damp proofing membrane around the corners
4. Drill and fit the membrane to the walls, making sure it fits tightly
5. Apply finish to the membrane
Your damp proof membrane will last longer if you get a professional to do it, and you’re less likely to have problems during its lifetime. To find up to 4 damp proofers in your area, just use our service.
Price
Approx. £70 - £100 per square metre
Depending on material
Installation time
Approx. 1-3 days
Depending on area size
Advantages and disadvantages
- Prevent damp walls from spreading to other areas
- Prevent salt contamination from spreading
- Provide damp proofing under a new slab