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Termites and Concrete Slab Homes

Many home owners assume that a concrete slab and external brick walls prevents termites from accessing their home. This is untrue. Termites can gain access over the slab edge and can travel through brick mortar joints and weep holes in external brickwork. They also gain access through cracks in the slab and slab penetrations such as plumbing and electrical wiring. Often homes built on concrete slabs (slab on ground construction) are brick veneer with soft-wood timber wall frames. This timber is located close to ground level and is easily accessed and readily consumed by termites. It is therefore critical that a Pest Inspection is carried out for homes on concrete slabs.

If the concrete slab edge of the slab is concealed by concrete paths, patios, pavers, garden beds, lawns, foliage, etc then it is possible for termites to gain concealed access into wall frames. They can then cause extensive damage to concealed framing timbers. With a concrete slab home it is imperative that you expose the edge of the slab and ensure that foliage and garden beds do not cover the slab edge. Weep holes must be kept free of obstructions.

What are Weep holes?

Pest Inspection Hornsby - Weep holes can provide access for termites into a home

Not only do wood chips attract termites but the weep holes (gaps in brick work designed to drain water from the wall frames) are at ground level. Weep holes must be a minimum of 75mm clear of ground level to allow detection of termite entry. This example is taken from a Pest Inspection in Hornsby.