Sample Specification for two types of Roofing Work found in Housing Rehabilitation Projects |
Why: Evidence of Internal Water Damage, Physical and/or Structural Damage, Age
When: March-November (Northeastern)
Who: Roofing Company, General Contractor
For example, if there is evidence of water infiltration water stains or damage on any ceiling, a complete tear off including shingles and underlayment should be part of the specification.
The type of shingle selected for the new installation should have a 30 year guarantee. It is important for the owner to see samples of the new shingle before making a selection.
Also included in the installation of a new roof will be building paper on top of the new plywood underlayment. In cold weather climates, there needs to be a 3 foot wide rubberized ice and snow shield three feet from the roof edge installed to prevent ice dams from forming in the wintertime.
If there is no sign of interior water infiltration of the roof project becomes less complex.
Mineral roll roofing with 18" overlapping on the flat roof, complete with lap cement underneath each course. Build up drainage slope where needed.
Supply and install new aluminum flashing between exterior house walls and the flat roof, complete with seal to the existing roof with flashing cement.
This type of roof should have a 10 to 12 year guarantee.