Just found this little debate on Glass v polycarb
Glass being clear allows the suns strength to enter the house which when passing thro the glass becomes weaker and so cant get out again - hence its higher temperature inside. More efficient than plastic.
Glass being clear allows better light to enter in the winter months when good light is at a premium.
Glass although more brittle than polycarb is stronger strucurally and once fitted combines with the ally frame to give flexible strength to the greenhouse.
Glass is cheaper much cheaper than polycarb [which would need to be th edouble wall type.
Glass doesnt scratch and its there for years and years. It doesnt expand like plastic and so doesnt 'pop out' on a hot day.
Both types of houses would need cooling down during high summer. Leaving open the door and vents. wetting with water. hanging shade netting is effective or newspaper works too.
Be it glass or plastic people tend to forget that it need sto be kept clean for maximum light and hygiene. Can be an unpleasant and time consuming job to wash and disinfect but I use a superspray sprayer from
Superspray The Best Hose Accessory you'll ever own it connects to a hosepipe and dilutes as you spray. perfect for stiky Jeyes fluid and you can get detergent up onto the roof without getting up a ladder or getting a soaking. Its cheap too. well worth a try. make sthe job easy and therefore I do it rather than put it off.
vegman