Damp proofing diagnoses and treats damp in walls. Work covers rising damp via a new chemical damp-proof course (DPC injection), penetrating damp through defective walls or pointing, and condensation and mould control. Treatment typically includes installing the DPC, hacking off and re-plastering with salt-retardant render, and addressing the source of the moisture.
[link_suggest: Plastering & Rendering (#1019), Brickwork Repairs & Repointing (#1024)]