We use high tensile aluminium (70% stronger than normal aluminium), premium 3mm polycarbonate sheet, and stainless steel fasteners.
No, clear is too hot! We offer a medium grey sheet, cutting out:
- ~100% of UV radiation
- ~50% of visible light
- ~20% of heat
This is the best Goldilocks solution. Not too dark, not too light!
We only use polycarbonate sheet because it is 15x stronger than the cheaper acrylic or perspex alternative many other companies use.
Flexiroof shelters not only look great, but they are also designed to last for decades, even in New Zealand’s wildest weather situations.
Under snow load, some sag will occur, but as the melt occurs, our strong and elastic materials will return to their original forms.
Normal window aluminium has an ultimate tensile strength (UTS) of 150 MPa. Our rafters have internal bracing ribs are made from higher tensile 6016 T6 aluminium (UTS 235 MPa.) and all our other extrusions are made from the even stronger 6106 T6 aluminium (UTS 260 MPa.)
To ensure Flexiroof handles high-wind we:
- Use 3.00mm sheet and trap it with geometry video so there are no holes in the sheet (corrugated polycarbonate is only 0.9mm thick)
- Use polycarbonate sheet – 15x stronger than common acrylic or perspex alternatives
- Use 10mm stainless fasteners
In exposed places, during storms there may be sheet noise (in keeping with noises from the rest of the house!)
We had several shelters hit by the Auckland West tornado in early 2018 and they all survived well.
- 6061 T6 aluminium and polycarbonate sheet which are inherently very corrosion resistant
- Stainless steel fasteners – all steel will corrode over long periods of time when exposed to sea air
A note regarding galvanic corrosion: “battery corrosion effect” can occur with dissimilar metals (such as stainless and aluminium) but for it to occur it needs moisture, salt, and a lot of time. If you are putting aluminium windows (or a Flexiroof shelter) on a fishing trawler you will definitely have a problem. Otherwise, here at Flexiroof we are certain we are using the best system possible.
Delivery & Installation
In New Zealand you do not need a permit for any of our shelters that are less than 20m². We often put independent shelters adjacent to one another, that are all less than 20m² but combined over more than 20m² with no permit.
Our shelters are made to order so our normal delivery time of kits to your agent is:
- 6-8 weeks for the North Island
- 8-12 weeks for the South Island
If this is too long for your project, or you have a big family event approaching, please let your agent know, and we can see what we can do!
Please contact your nearest agent to learn more.
To insure the integrity of your Flexiroof we only allow our agents to install our shelters.