Subfloor bracing
In Build 131 (pages 29–30), we explained the information needed before starting bracing calculations for a building. This time, we work through a subfloor example.
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In Build 131 (pages 29–30), we explained the information needed before starting bracing calculations for a building. This time, we work through a subfloor example.
The 2005 BRANZ House Condition Survey found 38% of homes with suspended timber floors had less than half the subfloor ventilation required by the current building standards. This inadequate ventilation can cause some serious problems.
Ventilation is required to reduce moisture levels, but can too much subfloor ventilation reduce the effectiveness of underfloor insulation? BRANZ set out to find the answer.
Houses built on sloping sites have performed poorly in recent earthquakes. BRANZ experiments have shown how to retrofit pre-1960s timber house foundations to significantly improve seismic performance.
Renovating existing buildings is an ideal time to improve insulation to current standards from that required when the house was built. One common change is replacing subfloor foil with another product.
Here, we offer a solution to NZS 3604:2011 Timber-framed buildings clause 5.5.2, which has had callers to the BRANZ helpline scratching their heads.
Subfloor performance plays a big part in the comfort and health of our homes. BRANZ is modelling appropriate levels of subfloor ventilation to understand what makes a healthy building.
With continuing analysis at BRANZ since the article Ventilation and subfloors in Build 149, we’re now able to shine more light on moisture accumulation in subfloor spaces.
What can be done when joints are required in bearers over anchor or braced piles?