Pozzolans

What Are Pozzolans?Pozzolans (or in Italian: pozzolana) are various glassy materials (e.g. specific natural sands, ashes or powders) mixed into lime that can make lime plasters hydraulic, which is water resistant or even completely waterproof. The name originates from the town…

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Lime Thermal Insulation

Thermal Insulation of Solid Walls

The ProblemEnergy efficiency of old buildings is a hot topic nowadays. Unlike new buildings which are designed and built with adequate insulation in mind, the retrofit insulation of old buildings – especially the ones with solid walls – poses significant…

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Rainwater Splashback

Rainwater bouncing back from the ground or the plinth is another source of moisture that affects all buildings, especially older buildings built of more porous, water-absorbent materials.This can be recognized by a green discoloration occurring towards at the base of…

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Rerendering Old Buildings

As mentioned earlier, the ideal solution to the problem of driving rain in older buildings is a rendering system that is both waterproof and breathable.The technology of a traditional rendering system that fulfills both of these criteria originates from ancient…

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Wind Driven Rain

Wind driven rain is a major problem especially in coastal areas, as it can saturate the building fabric, leading to staining, spoiling of internal decorations, even to structural damages long-term.Salts dislodged by driving rain from the fabric can be deposited…

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How Salts Damage Old Buildings?

The problem of moisture movement in old buildings are accompanied by the migration of salts, the moisture problem becoming a dual problem of water and salts.What are Salts?Salts are minerals made up of two electro-chemical parts called ions. The electrically positive…

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