Lab Test and Results

Experimental SetupWe have done an in-depth investigation on how damp masonry responds to artificially generated external electromagnetic fields. Using a commercial function generator we applied to our test wall a wide variety of regular and irregular wave forms and pulses…

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Step 2: Renovating After Rising Damp

The Main Challenge - SaltsAfter the installation of a damp proof course, renovation is the second major phase of handling rising damp.The main challenge in renovating after rising damp is the presence of GROUND SALTS.Walls affected by rising damp contain…

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Solving Rising Damp in Old Buildings

Solving rising damp requires very exact, specific steps. Let's recap first what the problem is, what we are trying to solve.The ProblemRising damp is the natural upward movement of water inside porous masonry.Rising damp is a STANDALONE phenomenon that can occur on…

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Rising Damp – What it is, What Causes it?

Rising damp is the natural upward movement of water inside porous masonry. A Standalone Phenomenon Rising damp is a STANDALONE phenomenon that can occur on its own on both internal or external walls, even in well-maintained buildings, independent of any other dampness problems…

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Solving Rising Damp in Churches

Interview with an old-timer conservation architectWe really enjoyed working with Mr John Dodson, old timer conservation architect, on solving damp problems in the St Peter's Church in Thornton.  We couldn't miss this opportunity of asking him about his life-long experience…

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Solving Dampness Problems in Old Buildings

Welcome to our "Dampness" section. Dampness is one of the main causes of decay of old buildings. Most common moisture sources affecting old buildings listed below.Rising damp: buildings are sitting on the damp ground. Over time, the porous building fabric can absorb…

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“Water in” vs. “Water out”

The amount of water inside damp walls - and weather a wall is getting damper or drier at any point - is determined by the balance of two factors: Water in: how much water being absorbed into the building fabric…

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Pressure Driven Flows, The Role of Heating

The Effect of HeatingIn addition to electrokinetic short-range forces, some external factors - such as temperature and pressure - also affect the movement of moisture inside capillaries.The positive effect of slow, steady heating in old buildings is well known. Heating…

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The Electrical Double Layer (EDL)

The Water Molecule Water (H2O) consists of two positive hydrogen and one negative oxygen atom. This combination overall is neutral as the opposite charges (H2 and O) balance each other out. Silicate and water molecules Capillary Wall  - Water Interaction…

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The Importance of Salts in Rising Damp

The Importance of Salts The importance of salts in rising damp can not be overstated. Salts are an extremely important but often much neglected aspect of rising damp. The rising water flow draws up diluted salts from the ground, depositing…

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