Physical termite barriers are installed to new homes and can be either stainless steel mesh or graded material such as granite or chemically impregnated blanket. Physical termite barriers are designed to force termites out and help prevent concealed entry, for example, termites entering via plumbing penetrations, construction joints or through the cavity between the brick work and the slab. It is important to remember that physical barriers will not stop termites but force them into the open where regular inspections will detect termite activity.

 

Physical termite barriers are covered by warranty however it is important that annual termite inspections be conducted by a licenced termite inspector.  Additionally, in order to maintain the warranty it is important to maintain the integrity of the physical barrier and ensure it is not covered by paths or landscaping as termites may bypass the barrier and enter the building thus voiding any warranties.  It is also important to check with the manufacturer in regard to their recommended ground levels around the barrier.

 

 

Chemical barriers are normally installed to existing homes or buildings around the perimeter and involves trenching down to the foundations. Ideally concrete should be cut out and trenched, however the costs often makes this an unviable option for many home owners. Any clay or unsuitable soil should be removed and replaced with a high quality soil which will help the chemical bond better and giving a far superior job. It is also a good idea to rectify any poor drainage to help prevent chemical from getting washed out. Termidor appears to be the superior chemical at the moment.

 

These barriers also come with warranty and it is important to carry out annual termite inspections. 

 

 

 

This where the edge of the slab is used to help detect the entry of termites. This system requires regular inspections by the occupier of the building. The edge of the slab needs to be smooth with no honey combing or rough edges that may conceal termite entry. It is also vital that a 75mm visual be kept on the slab edge. Many people will paint or render the slab edge and this has the potential for concealed termite entry when the paint or render delaminates.

 

 

 

It can be the case that some builders will not install any physical barriers when building a house with treated frames or steel frames and this is not good enough. If you are building a new house or extension insist on a physical termite barrier.

 

Termites cannot read so whatever rules we try to make up for them they’ll find a way to break that rule.