Hi Further to Kwicky, Agree totally. At the very least you should have either Bronze or Opal Triple Wall PolyCarbonate sheeting. Ideally Anti Sun Glass is best but that will put the price of the roof up by nearly �1,000.
The only real advantage of a glass roof is the decrease in sound when it is raining. Also if you go for a glass roof dont get conned into buying the self cleaning glass. Expensive and not really worth the extra money. Al
The price I quoted for the roof is top of range, either Ultra Frame, Global or K2. These will use the better polycarb.