Bridging of the damp proof course, or bridging of the dpc, is such a common cause of rising damp to internal walls, and also external walls. BS 6576, and BRE DIGEST 245 is the standards that all damp surveyors should be following.
As per the video you need to ask your damp surveyor some vital questions.
If you don’t ask these questions you might fall into the trap, and perhaps your root cause of rising damp will not be diagnosed correctly, that could result in expensive treatment and repairs.
By getting the correct survey initially, it will add value long term.
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 / destructive 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., but will be pushed by damp surveyors as these are cheap and quick.
3. An averagely competent surveyor will follow the guidance in BS 6576, as per what I have spoke about in the 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 gravimetric analysis.
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.
BRE DIGEST 245.
Click the link to my website to give you a better understanding about carbide meters / speedy meters
www.completepreservation.co.u...
Click the link to my website to get a better understanding of the carbide meter / speedy meter
www.completepreservation.co.u...
The latest damp methodology by RICS, SPAB, HISTORIC ENGLAND, HISTORIC SCOTLAND, PCA, CADW
www.completepreservation.co.u...
0:00 Introduction
1:10 DPC bridged by debris within cavity
1:45 DPC bridged by mortar
2:08 DPC bridged by external render
2:32 DPC bridged by high ground levels
3:01 DPC bridged by the solid floor
3:26 DPC bridged by plaster
3:47 BS 6576 2005 BRITISH STANDARD
5:42 What needs to be eliminated ?
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2 авг 2024