Step 5: Preventing Problems During Landscaping, Paving and Site Works

Barriers can easily be rendered useless if hidden, damaged or bypassed by landscaping, paving or site works. This same construction can also hamper sub-floor ventilation. It is best to design landscaping, paving and site works at the same time as selecting the barrier system. Frequently asked questions associated with problematic issues are dealt with in this section.

For landscaping, use only treated or naturally termite resistant timbers

The plans call for exterior paving, planter boxes and garden beds next to the building. Does this pose a problem?

Do not let paving, planter boxes, mulch or garden beds cover physical barriers, weep holes or inspection zones such as slab edges. Barriers must be visually inspectable.

For chemical barriers be particularly careful not to disrupt treated soil during excavations. Also do not cover these barriers with garden beds as this will create a hidden pathway around the barrier.

Seek additional advice for paving in the Northern Territory and Queensland as paving is required to protect chemical soil barriers but must be positioned correctly.

Fig 11: Proper treatment of paving and planter boxes (left) :: Don't allow garden beds to cover chemical barriers (right)

What type of timber can I use for landscaping?

Use only treated timber or naturally termite resistant timber. Other timbers only encourage termite attack. For appropriate timbers refer to AS3660.1 or to Appendix A for a summarised list.

Fig 12: Decks should be isolated from the building

What do I need to look out for when adding a deck or balcony to the house?

Ensure the structure is either isolated from the main house or has a barrier system that integrates with the house barrier. It must not breach the existing system. Ensure that stairs, posts, landings and porches can be inspected for termites.

Does rendering or painting the exposed edge of a concrete slab pose a problem?

These treatments potentially allow hidden termite entry behind the paint film or render. It is best to avoid these practices if at all possible.