Capillary Suction – The Catch 22
One of the tell-tale signs of premature shingle failure is "capillary suction". Moisture can get into and behind the shingles because they sit tightly on top of one other. Water will literally appear to defy gravity as it is drawn backwards (wicking) into the overlapping above fiber cement shingle. The way to defeat capillary suction is to perfectly seal each and every shingle. Obviously, this would be impossible to do. That's why we are having problems today. Another method is to ventilate the space between each shingle by creating a gap. Unfortunately, shingles work best at shedding rain water when you eliminate or shrink the gaps. It seems to be a proverbial Catch 22! If your shingles are breaking and falling apart, pick up the phone and call me right now (817) 781-9982 or use the handy online contact me form. Michael D. Coday II (817) 781-9982 Contact MeRelated posts: Asbestos Fibers?