What is roof slope? Does the slope of the roof limit the choke of shingle that can be used?
The slope of the roof is measured by the rise vs. the run, or the number of inches vertically by the number of feet horizontally Some roof slopes can limit the choice of shingles that can be used. For Instance: • A roof slope below 2/12 (2 inches per one foot) cannot use shingles. • Roof slope between 2/12 and 4/12 require low slope application techniques, including application of waterproofing underlayment as appropriate. • Roof slopes above 21/12 require steep-slope application techniques. Your roofing contractor should consult the application instructions found on each shingle bundle wrapper or installation instructions supplied separately for further details. 3. Is it always necessary to tear off existing shingles before reroofing? If they are torn off, who is responsible for the disposal of the old shingles? There are two options available for reroofing installations. One would be to tear off the old roof before applying the new one (tear off). The second would be to lay new shing
