FHA 4900.1 Tests membrane's chemical resistance to highly alkaline solutions such as soapy water. Simulates dropping of sharp edged tools onto membrane. 24 o F for 24 hours, then membrane folded back on itself twice and then tested for cracks. FHA 4900.1 plus Sec. F Membrane is tested for lineal change after being heated, and also after being cooled.
Results give psi at which membrane ruptures.
ASTM D568-77 Measures rate and extent of burning of bare membrane. No crack, crazing or water penetration observed. ASTM D1434 Measures amount of methane gas that permeates membrane. ASTM D1203-89, Method A Measures weight loss and distortions after accelerated aging of membrane.