Locking mechanism or how the products join together
The benefits of these grids are that they lock firmly together and do not come apart. If grids come apart by hand then they will certainly come apart with light vehicle use then they will lift and break and the surface will become unsafe and unusable, resulting in the lifting of the area and re-installing creating huge end costs.
EcoGrid/Ecoraster carries a world patent for its locking system, developed over 21 years of production.
Polyethylene is widely accepted as the best material to manufacture this type of product from, it is highly durable and resistant to all extremes of temperatures and chemicals found in general use. LDPE is the best version of this (low density polyethylene). This material is suitably flexible for the use with vehicular traffic, in short it bends with use and expands and contracts appropriately with temperature variations. EcoGrid/Ecoraster is made from recycled LDPE.
UV is sunlight, however the agent (carbon black) to provide UV stability is an added material. This costs, if one is looking to sell a product cheaply then there is a temptation not to put it in, ensuring that the product will break down within a very short period of time.
EcoGrid/Ecoraster is fully UV stable.
Plastic either as a virgin material (not recycled) or recycled material at the end of the day costs about the same throughout the world and production costs thereof are approximately the same also. Therefore one way to make the product cheaper is to make it lighter, thinner or a mixture of good and bad plastics. If a grid offered is half the weight of EcoGrid, then ask yourself why? Thin walled products will easily break under the weight of even the lightest of vehicles making the surface unusable EcoGrid/Ecoraster E50 is 9.55 KG per square metre and 7mm wall thickness, the heaviest on the market. We don’t make it this heavy for economical production reasons but to produce the best quality product possible.
All ground conditions vary, no matter how you prepare them, they are subject to heave, settlement and many other factors. Grids should be small enough to take on variations in levels, the smaller the better. Larger sized grids (most offered are 500mm x 500mm) ‘bridge’ voids and produce a springy surface, making it far easier for the grids to flex upwards and allow the surface material to ingress under the grids and make the surface once again unsafe and unusable.