ARA - ParkaWrap
AOTEAROA HOME RETROFIT PILOT
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Cladding
Parka-Wrap has provided brackets and framing which go immediately behind the cladding. This creates essential drainage and drying capabilities that were not incorporated in the original wall system.
Fibrecement solutions contributed Eterpan sheets for the cladding. They were selected for their low maintenance and durability.
Fibre Cement Solutions
www.fibrecementsolutions.co.nz
10A Kaimahi Road Auckland 0627
09 900 0327
Frequently asked questions
Can you explain the stainless brackets?
Stainless brackets are the first prototype of a structural fixing that copes with different depths of insulation, and different angles of attachment due to the hinged arm. The next iteration of the product is both stronger and lower thermal conductivity due to material and improved design. The structural capacity is both vertical and horizontal due to the fixing to the external batten – two screw fixings locks the arm in place. Patent pending.
Is that a metal clip for the cavity batten? What effect did that have on the modelling?
The thermal conductivity of the banana clip through the insulation is expected to be less than the equivalent two screws when using other fixing systems. Thermal modelling not yet complete. Compared to other fixing systems this is a low-conductivity design.
The raptor clips were cost effective or just deemed easier to install consistently?
The Banana Clips allow for consistency of finish with wildly varying substrate (weatherboard, no weatherboard, varying angles). They use a self-sealing tape beneath the base plate to ensure weathertightness is maintained.
Are screws through insulation very long and structural?
Long screws through insulation is common practice in North America and rely on the density of the Rockwool to create a truss. Search RDH Canada ‘Long screws through insulation’. This is possible here and is how Jon tested the system however the Banana Clips are fixed on prior to insulation therefore the screw penetrations are sealed where they penetrate the weathertightness (ADHERO peel and stick).
What are those brackets holding the battens?
Banana Clips from Parka Wrap Ltd. They have other names, some of them rude.
Are the banana brackets designed to carry various loadings from various cladding types?
Yes, final engineering of the load capacity is underway. Like other systems, cladding gravity loads, wind loads, support rail capacity... all factor into how many clips are required.
Any thoughts on how you would accommodate vertical cladding?
We have used other systems for vertical cladding, Nuwall have an option for example.
Alternatively, an additional horizontal rail would be applied over the vertical battens. Similar to a good roof design.
Do those banana brackets have any insulation breaks? Are they metal?
At this stage we have not included additional thermal breaks but if required for particular performance it’s certainly possible. Considering the bridge itself fixes onto a low-conductive material (weatherboards) in this instance, there was no need for additional thermal break.
