Sympathetic damp solutions are necessary on a property like this. This is promoted in the new joint damp methodology by RICS, Historic England, SPAB, PCA & in my opinion in the below video you can see the solutions to deal with the root cause of damp, that were not noted by the previous free damp survey. The survey takes you from enquiry, survey, right through to the repairs.

Its really important to make sure you ask the damp specialist prior to booking a survey the questions to ensure the surveyor is competent, and most importantly give you the correct damp diagnosis.

1. First of all you need to make sure your damp surveyor is suitably experienced, and qualified. 

2. You must ask for an invasive / intrusive survey if it’s anything to do with damp at the base of the wall, and possibly bridging of the dpc, like rising damp. Non invasive surveys will simply not be good enough. 

3. An averagely competent surveyor will follow the guidance in BS 6576, as per what I have spoke about in this video.

4. They will also need to follow the methodology in BRE DIGEST 245. This is basically the only quantitative methodology to confirm rising damp, by using a carbide meter / speedy meter or better still gravimetrics. 

5. Make sure all of the below are eliminated as a potential cause by your damp surveyor, as per guidance in BS 6576 

1. Condensation 

2. Lateral penetration associated with ground and floor level 

3. Leaks from roofs gutters, and downpipes 

4. Faulty drains 

5. Internal plumbing leaks 

6. Water penetration through external walls 

7. Water penetration around windows and doors 

8. Mortar droppings in the cavity 

9. History of flooding 

I do find that if a physical damp proof course is present and there is damp on internal walls, there is a high possibility there could be drain issues, or a possible leak.

Posted by Complete Preservation


  1. Without sounding rude a PCA surveyor will not carry out this type of survey. The PCA training doesn’t cover traditional building repair, according to the chap in our office who recently did the online training.


    1. Hi Brian im a PCA member and it is me who carried out this survey. You will probably find many MRICS surveyors don’t carry out this type of survey also. Most surveys are sold to unsuspecting clients as non invasive or non intrusive, which are in my opinion a complete waste of time (for this particular survey). Some people say, that you might find something obvious and that type of survey is acceptable, however if you ask the client the correct questions and get images pre survey, it will be pretty obvious what type of survey is needed.
      Best practice in my opinion is to follow guidance from BRE DIGEST 245, and the elimination recommendations as per BS 65776.


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