Injected damp proof course

In all cases the damp proof course should, as far as possible, be installed in accordance with the British Standard ‘Code of Practice for Installation of Chemical Damp Proof Courses’ BS6576 (1985). Usually we will install the injected DPC below the level of timber floors to prevent rising damp from affecting floor joists and other sub-floor timbers as well as preventing rising damp from travelling up the wall

10mm holes are drilled at approximate intervals of 100mm , usually two holes in every stretcher and one hole in every header of a normal 225mm wall built in Flemish Bond- which is the most common in London houses, and then a silicon based damp proofing fluid is injected under low –pressure until the brickwork is saturated.

Injected Damp Proof London
The chosen height for the new damp proof course DPC height should always be at least 150mm above external ground level to prevent rainwater splash back from causing low-level water ingress, brickwork below this level is coated with a silicon water repellent to prevent any penetrating damp. If the treated rooms have solid floors then we insert the DPC as close to floor level as possible. Vertical DPCs are also installed to connect horizontal DPCs where ground levels change and to isolate untreated wall areas (on adjoining properties, garden walls etc.)

For prices on the installation of an injected dpc please send the length and thickness of wall that needs treatment and we will provide you with a fixed price quote for a new injected damp proof course.


Alternatives to an injected damp proof course

We also offer two alternatives to an injected damp proof course.

Cost of Damp Proofing Treatments

Average cost of installing a new damp proof course by London Damp & Mould Control

3/4 bed semi/terrace-
Injected damp proof course to all external walls


4/5 bed detached-     
Injected damp proof course to all external walls


These are the cheapest damp proofing prices available in London. If you have a cheaper bona-fide quote offering a GPI insured guarantee please contact us and we will beat that price.

For a free survey and estimate for Injected Damp Proof in London, please call 020 7458 4195.


Damp-proofing can be undertaken by competent builders or DIY enthusiasts and providing damp-proofing materials are bought form us and manufacturers specifications are followed then we can issue twenty year guarantee against rising damp recurring.

D.P.C fluid 5 litres- dilutes to make 25 litres- will treat 10 linear metres of brickwork- £35.00

20 year guarantee – price on application


Our Reviews

"Thanks for the very prompt service in providing the estimate for the works and then arranging the damp proofing and plastering to be done so quickly. Your men did a great job and left the place spotless"
- J.A. Southfields Road, Chiswick , London W4 1AG January 2017

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