Hi
We use the Pyramid Luxor which is a very tight weave ground sheet. We have been using it for the past 5 years and its in as new condition and its used for 10 months a year. Its great on grass as its fully breathable and lets the grass grow but not through the weave, great on chippings the only problem I have come across is in Feb,March,Oct and November its a bit cold under foot when you go in the awning bare footed unlike the earlier softer open weave type. Has really took the toll of us, visitors and the husky
Hope this helps