wi-fi dish mesh size?

Hello
I'm building a wi-fi dish, I'm covering it with netting, I've looked at white bait netting but it gives too much wind resistance, what is the largest mesh size I can use at that frequency 2.5 GHz .
I know I can buy a Antenna, but fun is there in that.

Thanks

chicken wire or finer should work.

I have look at this design, http://www.usbwifi.orconhosting.net.nz/beachumb.jpg , but even it says that iron bird netting is just on the limit for 2.4GHz 0.1 wavelenght limit, netting has a grid of 13mm and white bait netting is just to small.
Can anyone tell me the numbers I need to go shopping for some netting.

Thanks

I found this info
http://homepages.inspire.net.nz/~gla...ions/Dspcs.pdf

Wire meshing in windows is also an important obstruction to note as depending on the mesh gaps, the attenuation will vary greatly. A 2.4 GHz signal wavelength is approximately 125mm, if a mesh gap was to be 1/10th the wavelength thus 12.5mm approximately ½ inch it would behave like a basic faraday cage (are usually designed so that the largest mesh openings have a diameter of 1/10 of the shortest wavelength). Therefore in this case the degree of attenuation would be extremely high as it would effectively be screening out 2.4 GHz frequencies.

so from this info I can see that any mesh I buy must not have a gap of more than 12.5 mm, or the signal will not be Reflected.
just what I needed to know.

I would value any more help?