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How to Install Damp Proof Cream...

DIY Damp Proof Cream


This is a modern rising damp treatment whereby a Damp Proof Cream forms a horizontal barrier against rising damp when injected into the mortar bed joints of a wall. The Damp Proof Cream is most suited for Brick walls, Masonry Walls and Stone walls and can be applied from inside or out. 

 Drilling hole for Damp Proof Cream  Installing the Damp Proof Cream  Inserting Damp Proof Injection Plug

             Drill                                  Install                                        Plug

                                               Key Benefits

 - Easy to apply as does not need specialised high pressure equipment.

 - Fast, clean installation.

 - Virtually odourless.

 - Low hazard.

 - Tested to BBA Moat No. 39:1988

 - Economic consumption rates.

 - Ecologically safe.

Directions for Use


  1. Repair or install drains to carry away surface water.

  2. If internal floors are below external ground level form trenches along the external face of the walls at least 150mm below the proposed Damp Proof Course level (where foundation depth allows). If approach is not feasible the Damp Proof Course must be placed 150mm above external ground level and the internal walls tanked below the Damp Proof Course to prevent lateral migration of moisture/salts.

  3. Remove skirtings, fixings and render/plaster to expose the line of the proposed Damp Proof Course (mortar bed).

  4. Internal plaster which may be contaminated with hygroscopic salts should be ‘cut back’ a minimum of 1m above the Damp Proof Course line or 300mm above the highest signs of dampness/salts. 

  5. Check flooring timbers for signs of fungal decay and repair/replace as appropriate.

  6. Ensure wall cavities are cleared of debris.

    Application of the DIY Damp Proof Cream:

    Placement and Depth of Drilled Holes

  7. Walls vary in thickness and type of construction so it is essential these factors are taken into account before deciding on an appropriate drilling pattern.

  8. Older properties may consist of several different styles of construction and the specification of drilling and injection should be carried out accordingly.

  9. Damp Proof Course height should always be at least 150mm above the external ground level.

  10. Vertical Damp Proof Courses should be provided to connect horizontal Damp Proof Courses where ground levels change and to isolate untreated wall areas (adjoining properties, garden walls etc.)

  11. In most cases solid brick walls may be drilled/injected from one side only.

  12. For cavity walls each leaf may be dealt with as separate 155mm thick wall. Alternatively, if preferred, drill through the selected mortar course, across the cavity, then drill the other leaf of brickwork to a depth of 90-100mm and inject in one continuous process (the physical properties of Damp Proof Course ensure the Damp Proof Cream remains in contact with the surrounding mortar bed).

  13. Always ensure the cavity is clear before treatment.

  14. In random stone and rubble infill walls, as far as practically possible, follow the mortar course at the appropriate level. However, if the stone is of a porous type, it may be possible to vary the drilling location (mortar/stone) as long as the mortar bed perpends are treated.

  15. In the walls of greater than 350mm thickness it is recommended that drilling is undertaken from both sides at corresponding height.

  16. In the case of drill holes becoming blocked these should be re-drilled just prior to injection or a new hole drilled nearby to ensure than an adequate volume of Damp Proof Cream is introduced

  17. Drill 12mm diameter holes horizontally in the mortar bed at centres no greater than 120mm. The depth of hole required for various sizes of wall is shown in the table. For walls of intermediate thickness the depth of holes should be pro rata. Where the masonry is irregular, ensure the horizontal drilling pattern targets the base of all perpends of the course selected. 

    Hole depth required for walls of various thickness:


     Wall Thickness            









     Depth of hole    

         100mm      210mm      320mm     430mm

    Injecting the Damp Proof Cream:

  18. If wall is dry you MUST pre-treat the wall with water. A couple of hours before application fill the holes with water.

  19. To inject the Damp Proof Cream use either a caulking gun or hand pump.

  20. Use the gun/pump to establish a positive pressure. Insert the lance of the Damp Proof Cream application gun into the full depth of the pre-drilled hole. Squeeze the gun trigger and back fill each hole fully with DPC to within one centimetre of the surface. When treating cavity walls from one side make certain that the holes in each leaf are filled.



    Wall Thickness 













     DPC per 10m

      1 Litre

     2 Litre

     3 Litre


     4 Litre



    Finishing the Job:

  21. On external faces of walls drill holes can be re-pointed using a matched mortar or plugged with plastic caps of a suitable size and colour.

  22. On internal faces holes can be left open and plaster stopped short of the Damp Proof Course or covered with skirting boards.


  23. The removal and replacement of internal salt contaminated plaster is an important part of effective damp proofing work (salts left by rising damp are hygroscopic and cause future staining independent of structural dampness). It is essential, therefore, to follow specific guidelines drawn up for dealing with the particular challenges posed by damp/salt affected surfaces. It is advisable to leave walls injected with Damp Proof Cream to dry for as long as possible, and for at least 14 days, before removing excess salts and commencing re-plastering.

  24. An integral waterproofing additive should form part of the re-plastering specification. 



           Damp Proof Cream     

  Damp Proof Cream 400ml    

               1L Damp Proof Cream             

          Damp Proof Cream 1L 

       Damp Proof Cream DIY Kit  




Damp Proof Cream DIY Kit   





 Important Information

SkilledBuild is committed to development and supply of quality products and may substitute or change product branding or specification or technical data without notice.  Always check for latest information.

All information provided is based on practical tests & published data and is intended to guide a competent DIY user or contractor in the typical use of products for minor works but is without guarantee.  If a failure of the works will be  costly to repair or hazardous then design & execution must be undertaken by competent persons.   Further advice should be sort from a suitably qualified advisor.  SkilledBuild may be able to answer simple product enquiries. 

Since application and working and user competence is beyond our control, no liability of the supplier can be derived from the contents of information sheets or other general information provided.  Any statements made beyond the contents of SkilledBuild’s website or product labels must be confirmed in writing by the supplier.