Mini Piling Contractors Middlesex

Many soils contain significant proportions of clay, and because of the very small particle sizes, they are affected by changes in the soil's moisture content. Seasonal drying of the soil results in a reduction in soil volume and a lowering of the soil surface. If a buildings foundations are above the level to which the seasonal drying reaches, then they will move and this can result in damage to the building in the form of tapering cracks.

Trees and other vegetation can also have a significant local effect on soils. Over a number of years a cumulative drying occurs as the trees grow, this can lead to the opposite of subsidence, known as heave or swelling of the soil. As the cumulative moisture deficit is reversed, over a period which can last as many as 25 years, the surface level around the tree will rise and expand laterally. This is often very damaging to buildings unless the foundations have been strengthened or designed to cope with this effect.

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Steel Retaining Walls | Timber Retaining Walls | Knuckle Piles

Northcroft Rd, Ealing, Middlesex W13 9SS

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