How the Products were Invented
These products were developed in response to a problem that I had with my house.
The Retro-Fit Perimeter System
(patent pending)
Over time the gardens surrounding my weather board home have become higher and higher until they were within a few millimetres of the bottom of the boards. I could see that some of the boards were becoming rotten due to the continual moisture present.
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The solution I devised was to dig a trench to remove the soil. To keep the soil away from the foundation I had pressed up an aluminium channel. Version 1 of the retro fit perimeter drain was born. The results were patently obvious. The foundation was dry and the zone below the boards was dry. The rot stopped!
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This version is for retro fitting and does not require Council approval. It uses a self draining principle with drainage holes in the base so that any water that enters just drains out into the soil or out via the 80mm outlet to a sump or other drainage system
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The logic here was simple. If I did nothing all the water from the weatherboards fell to the ground and was absorbed by it. In my situation there was no runoff. Thus I theorised that all I had to do was allow the water to be absorbed into the soils by adding holes to the lower portion of the profile.
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In practical terms however not all soils have the ability to absorb the water so I have added a drainage connection which can be connected to a sump or other piped drainage system thus keeping the water well away from the bottom of the boards. The Perimeter System Product
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Level-Entry Threshold System
(patent pending)
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In order to solve the height difference between the door threshold and the bottom of the cladding a new product was required.
Key to this was reading the NZ Building code E2/AS1 which is External Moisture Acceptable Solutions.
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The main requirements here were dimension based with the aim or removing water from the door zone to a drainage system. One of the requirements is that there must be a 12mm gap between the drain and the door sill hardware.
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Considerable development ensued to comply with the legal requirements. The result is a cost effective system which is simple to install and looks good.
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A team consisting of a designer, 2D/3D draughting consultant, and production engineers have refined the product to ensure ease of use and improved the aesthetic qualities.
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The Level-Entry Door Threshold System
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Dereck D G Gray. B.Sc.
13 King St
Mosgiel 9024
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DryZone Systems Limited is a fully Dunedin owned and operated local company.
All our products are manufactured and assembled in Dunedin.
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As we specialise in a specific building product we are open to design changes which will enhance the product and facilitate ease of use.
If you have a specific requirement we are more than happy to discuss it and if possible produce it for you.
We are here to help....!
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Onsite advice and consultation is available at no extra cost.
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