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Our Services

Rising Damp



Combined Building has been specialising in rising damp for approximately 27 years now. We complete over 100 jobs a year and have seen pretty much all the issues there are out there.


Please see our other web site for more information on Rising Damp


Our preferred method in chemical silicone injection which involves drilling a series of 10mm holes along the bottom brick course of a wall. The wall is then injected at around 100-150psi (your car tires run around 35psi) with liquid silicone until the brick is saturated. We then move onto the next brick until the entire brick course has been silicone injected. 


Once this is complete, all salt and damp effected render is replaced with salt retarded render mixed at a specific ratio to prevent any remaining salts in the wall from leeching through. 









Lateral damp occurs when below ground walls have not been built with sufficient drainage or non at all. Our general rule of thumb is, if the water pressure is active, ie- there is actual pooling of water inside the wall, then drainage is definately required. Preferably on the external side of the wall, and if this is not possible, then internal concealed drains. 


If the internal wall surface is only damp and causing issues to paint, plaster and render, then epoxy negative tanking membranes provide a good permanent cheaper option. We use them in combination with renders and silicone injection systems to achieve strong long lasting solutions.