Damp-proof course DPC
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Please note that retrofitting damp proof courses does not work in solid walled constructed buildings and can cause more harm than good. Simply direct water away from the building by having lower external ground levels than internal floor levels where possible and install free flowing land drains around the building.
Can you explain why you think it doesn't work?
Solid walled structures are designed to operate differently from modern buildings. Solid walled structures are designed to allow moisture to freely flow within the brickwork and evaporate naturally. The application of a modern material/ damp proofing will prohibit this transfer of moisture and lead to interstitial condensation.
I have retrofitted a DPC to a Georgian house, and it did work with no condensation problems.
Good injected DPC companies give a ten year guarantee for their work.
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