Untreated Timber General Information Risk Awareness
  • Kiln dried and untreated timber can be a significant concern if monolithic cladding develops leak issues, due to the lower levels of moisture content required to initiate decay and the accelerated rate of deterioration to the timber framing once decay has been established.
  • Damage to monolithic cladding is usually through a gradual deterioration over a number of years. There are three key elements that are required for decay to be initiated and sustained, Moisture, Temperature and Nutrients (timber). Aucklands weather means that if there is moisture ingress there is a probabilty that moisture damage could occur.�
  • Treated timber can take years for significant damage to occur as opposed to Untreated or Kiln dried timber which damage can occur in a matter of months, making timber treatment a serious consideration when purchasing monolithic clad properties.
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��Timber Treatment Cost includes:
• Collecting Samples
• Analysis of Samples
• Written Report with Certification
�POA (Price on application)
Specialist Inspections have an arrangement with a testing laboratory to have timber filings analysed to determine if the timber has any treatment. Results take approx 5 working days.
Timber Treatment General Information:
The NZS3602:1995 were changed on 11th September 1995 which allowed the use of untreated timber. Un-treated and Treated timber are both structurally sound under normal circumstances. The main difference between treated (normally H1 treatment) and untreated timber is if there are moisture ingress issues the initial moisture content to initiate decay is very low for untreated timber compared to framing with a timber treatment and the rate of decay for un-treated is significantly faster than treated timber framing. The time frame for the use of untreated timber for exterior wall framing was 11th September 1995 (NZS3602:1995) to 1 April 2004 (NZS3602:2004)
Sample collecting process:�
Timber filings are taken from the bottom plate of an external wall in at least two opposing locations. This requires two holes per level to be drilled through the skirting boards into the bottom plate. The hole size is smaller than a ten cent piece that is drilled into the bottom plate of the framing. Where possible Specialist Inspections will take samples from inside wardrobes or cupboards on external walls.
Note:Written permission is required from the owner of the property for SPPI to collect samples for anaylising. ���