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Recent changes in building practice have led to an old danger appearing in a new place — soft rot in interior structural timber. In the early stages of soft rot, the timber may appear solid. But a sharp shock can shatter it. BRANZ Accredited Adviser Philip O’Sullivan describes several cases he has discovered and explains the causes.
Life cycle costing can be a very useful decision-making tool for many groups in the building industry. Here some formulas are explained and some applications described.
The Forest Research Institute was recently commissioned by BRANZ to carry out an extensive life cycle analysis study of timber to assess its environmental impact from the planting of the tree until it leaves the sawmill.
Most new houses are built on a concrete slab ground floor. Some surveys indicate that the national average is 80% of new houses built on concrete, although there is some regional variation. The main reason for the dominance of concrete is cost. But on some sloping sites, timber floors can be cheaper.
During April and early May, BRANZ ran a seminar series throughout New Zealand on domestic concrete floor and basement construction. Some of the subjects that kept cropping up during question time all around the country related to concrete basement waterproofing.
Beware soft rot
