Hi Charly
buy it from the uk and get it shipped over will still be cheaper even after you pay the import tax and shipping.
I got 25mm for my roof, 5 layers 4 channels, and the cost per m2 was a third of the cost here, i spent 15,000 on the roof, (that was poly carb and all the fittings) and the tax and shipping to my house from the uk. i saved about 10,000 compared to buying it here, and that was only 40m2 of the stuff.
its very good though, don't loose any heat through it, snow stays on top until the sun melts it off.
Carl
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