Upon completion of framing, the next phase deals with the dry-in of your new home. Water intrusion cannot be regarded too lightly and roofing applied to your home as soon as possible helps maintain dry components, followed by the installation of windows and doors.
My preference has always been to complete the roofing before installing windows and doors. The “gravel” on roofing shingles can scratch window glass, and gravel from shingles gets rubbed off during installation. Making every effort to avoid accidents and breakage throughout the building process saves times and money.
Proper roofing installation includes layers of materials applied correctly. Think of these layers as a raincoat, each layer applied on top of the other and overlapping to allow water to shed off of your home. When you put on a raincoat, you allow it to overhang all of your clothing; you don’t tuck your raincoat into your pants. The same logic applies here.
Roofing layers should be applied to dry decking in this order…first, roofing felt to protect roof decking. Keep in mind that you want the felt to overlap the prior run starting at the lower edge of the roof and working your way up to the ridge. Nail roofing felt in place with plastic cap nails. Use a water shield product on areas with lower pitches, such as porch roofs, where roofs adjoin vertical walls, in valleys, at drip edges to prevent ice dams, around skylights and plumbing vents. Many roofs fail due to the lack of a proper starter strip being installed before the installation of shingles. Starter strip is installed on the roof edge and should overhang the eave. Shingles are then applied, taking care to properly install them in valleys and to use flashing where roofing edges meet vertical walls, vents for airflow and sleeves over plumbing vents. Ridge vents are often used in place of individual vents placed along the back side of the roof near the ridge. Ridge vents are more aesthetically pleasing to the eye.
Your general contractor monitors the workmanship of the trades that work on your home, and the presence of your general contractor on site during the process insures the correct application of materials.
There is one additional step to complete your roof following the application of exterior walls finishes…counterflashing. Counterflashing covers the joint where wall finishes such as brick meet roof edges.
Windows and exterior doors installed upon the completion of roofing complete the encapsulation of your home to keep it dry for the duration of the building process.