The screened porch has a fiberglass roof. It is cracked and has shifted position leaving open spaces in the roof, which is now leaking as a result of the heavy snow this winter. I need to repair the roof. I cannot find the fiberglass anywhere (not even Home Depo--I live in Haverstray, NY 10927). (1) Where can I find the fiberglass to repair the roof and the small insect screen? (2) How can I repair it since it is too light to walk on? (My guess is to lift the old ones from the inside on a ladder and insert new ones somehow? Do you glue them to keep the water from seeping between the cracks?) (3) There is also space between the house and the frame of the screened porch. I want to keep the bugs out as much as possible. Should I take screen and tack it to the vinyl siding of the house? Your response would be much appreciated --thanks.