Property Repair Systems

Damp Proof Injection - Guide Covering How To Inject a New Damp Proof Course in Your Home to Prevent Damp Damage

This project is sponsored by Property Repair Systems

Summary: Damp proof injection of all types of buildings. In this guide we show you how to inject a new damp proof course in your home using a DPC cream. Find out about what the correct spacing for drilling your holes should be, how deep they should be, what products and tools you will need and how to check damp levels using a damp meter.

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Until recently the cost of inserting many metres of damp proof course has been prohibitive for large projects, or thick walls, because of the technical difficulties of high pressure injection. The injection equipment is expensive, the technique is hit and miss, with even the ‘professionals’ struggling with blow backs, loss of fluid via fissures and the difficulty of getting a seal in crumbling masonry. The only option was to pay for a damp proofing company to carry out the work, including expensive replastering.

If you need any help with any type of DIY damp proof course or DIY damp proof injection or indeed any other damp problems Property Repair Systems staff will be pleased to give you completely free, (with no obligation), unbiased technical and practical advice on 01626 336180. The information you need may be in the project below. If not, call them for free help.

Chemical and Cream Damp Proof Courses

Now the second generation DIY damp proofing injection kits including DPC Creams have appeared and for the first time private individuals and developers, builders and DIY enthusiasts can reliably and cheaply inject their own chemical DPC.

Large jobs are no longer a problem – the small, hand pumped pressure pot dispenses the cream via a 10mm diameter aluminium tube, complete with on/off tap. Nothing could be easier!

DPC 3 litre pump

UltraCure DPC Cream Injection pump and rod – next to 3 litre UltraCure container

Main Features and Benefits of Cream DPC Damp Proof Injection

  • Quick and Easy to Install – Drill the required number of holes and the correct spacings and blow out dust. Once the hole is clear and free of debris inject the cream
  • No Wastage of Cartridges – Purchasing the required amount of cream in a bulk pack allows you to pour it straight into the inexpensive hand pump pictured above
  • Low Hazard – Many creams available are environmentally safe and carry no health warnings. The DPC Quick Cream available from PRS is not even rated as irritant!
  • No Spillage or Mess – Due to the nature of a cream and that fact that it can be pumped there are no liquids to leak or stain
  • Simple Hand Pressure Pump – If using a hand pump then simple hand pressure is all you need. Electrical pumps are available but involve either plugging in to a mains source (cables to get in your way) or batteries/recharging that can obviously run flat. Hand pressure for a DPC pump also allows you a lot more control over how much chemical dpc is pumped
  • 2nd Generation Technology – advanced emulsion uses active ingredient economically

If you would like to find out a little more about chemical DIY damp proof course cream or purchase them then check out Property Repair Systems here.

Check Levels of Damp With a Damp Meter

You may also find a damp meter useful, for checking the location, extent and pattern of dampness.

These factors can affect the remedial work that is necessary – with your own meter and some technical advice you can minimise any costs involved in successfully injecting a new dpc. Click on the images below to find out more about damp meters.

Property Repair Systems Damp Meter

Property Repair Systems Damp Meter

Property Repair Systems Hygrometer

Property Repair Systems Hygrometer

The Hygrometer pictured above shows the air temperature and the percentage of moisture in the air (relative humidity). This information is essential if you are suffering from condensation and black mould issues.

The damp meter measures the amount of moisture in a given materials. Simply stick the prongs on the top into the materials that you need to measure moisture levels and leave for the required time. The display will then give you a reading for "relative" dampness.

Damp Proof Course Injection Required Tools and Products

As mentioned, with the advanced in technology today it is now possible to buy all the items you need for your diy damp proof course injection. Some can be bought as kits or in individual quantities as required to complete the job. The essential items are as follows:

  • Chemical or cream damp proof course
  • Hand operated pump
  • Drilling template
  • 12mm diameter masonry drill bit
  • Suitable drill for drilling injection holes (length will need to be checked as it will depend on the thickness of walls)
DPC Ultra Cure Cream

DPC Ultra Cure cream with quick hand pump – no special tools required

PRS Drilling Template

DPC Injection made easy with the PRS Drilling Template – the correct level every time

As mentioned above, the spacing required for drilling holes to inject your cream damp proof course is vital. If they are spaced too far apart then you may not get the coverage of dpc cream required in order to provide an effective damp proof course. The correct spacing's and info are as follows:

  • Holes should be spaced 4.5 inches apart
  • Holes should be drilled 3 inches deep
  • Drill all required holes before you start to inject your dpc cream
Drilling a 12mm diameter hole

Drilling a 12mm diameter hole

Important note: Depending on the type of wall and manufactures specified coverage, you should drill and inject your cream dpc on both the inside and outside of your property. If you have a cavity then you will need to inject on both the inner cavity wall and outer cavity wall. If you have a solid wall then depending on it's thinkness you may only need to inject from the inside.

If you are in any doubt about how you should inject dpc cream for an effective damp proof course then you should consult a specialist damp proofing company such as Property Repair Systems.

As mentioned, a masonry bit, 12mm in diameter (or the required diameter for the size of injection nozzle you have), is required and the length of the bit will depend on the thickness of the wall so you will need to find out how think your walls are. Property Repair Systems can also supply you with the required drilling template so that you can ensure that any holes you drill will be spaced at the correct widths.

To find out more about this and what products are available and also if you require additional help and advice visit the Property Repair Systems site or give them a call on 01626 336180.

You might like to check out our video sections relating to damp proof injection and rising damp to watch videos on "damp proof cream installation" and "treating rising damp".

Don't fancy doing this project yourself? We work with Checkatrade to ensure that we recommend only reliable and trustworthy tradesmen.

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