Concrete shrinks as it dries. About 50% of the shrinkage happens within the first 4 months after placing, but concrete will continue to shrink for at least 12 months, depending on drying conditions.
Materials used in construction need to be selected so that the performance of one will not be adversely affected by an adjacent material.
Two key actions are required before installing internal timber board linings or wood-based panelling.
Carports are defined as buildings without walls and as such are not covered by NZS 3604:2011 Timber-framed buildings.
The Hazardous Substances (Importers and Manufacturers Information) Notice 2015 came into effect on 19 November.
Module 5A of the Geotechnical Earthquake Engineering Practice series 'Specification of ground improvement for residential properties in the Canterbury region' has now been published (refer to the Technical guidance page(external link)).
The limitation on using the site hazard spectra using Z=0.3 minimum factor in the Canterbury earthquake region only for structures of 1.5 seconds and less has been removed.
A new standard presents criteria for evaluating the suitability of water and aggregate for use in concrete.