Roof Asphalt Shingle Installation
While the asphalt shingles will be the primary water shedding roof layer there are many benefits to installing a roof underlayment.
Roof asphalt shingle installation. The felt is laid in horizontal courses overlapping the eave ice and water protector by 4 and the valley membrane flashing by 6. Use your chalk and tape measure to mark about 12 inches up on the roof for the first set of shingles. Although placing new roofing over old may be allowed by some codes roofovers tend to be inferior and won t last as long as a roof installed over stripped sheathing. Once you ve done that cut your shingles to size if they re not already.
To install asphalt shingles start by installing underlayment and new flashing on the roof. Below 40 f shingles are brittle and crack easily when hammered or bent. Above 85 f it is easy to tear the shingles or mar the granular coating. Starting at the bottom of the roof map out a guideline with chalk.
Installation temperature requirements for asphalt shingle roofs ideally shingles should be installed at temperatures ranging from 40 f to 85 f.