| All
preliminary steps for restoration are to be done, as specified,
prior to the application of Karnak's P-21 System.
ROOF PREPARATION
- Remove all loose aggregate as well as all
dirt, dust and other foreign material from the roof surface.
This may be done by power vacuum, brooming, high pressure air
or water or any combination that assures a clean surface.
Note: If water is used, caution should be exercised to assure
the water does not enter the insulation or decking through surface
breaks in the roof mat. Caution should also be exercised so
the amount of air or water pressure used does not damage the
roof surface.
- Trim all raised and/or standing seams flush
with the roof mat and, if necessary, restore or reinforce as
necessary.
- Apply Karnak #108 Primer at a rate of 1 to
2 gallons per 100 square feet extending the primer a few feet
beyond the area that will receive coating (this should seal
all loose dirt below the gravel surface and block moisture penetration
from the sides).
DRAINS AND PROJECTIONS
- Spud and scrape off the remaining gravel to
as smooth a surface as possible around each drain or projection,
approximately to the flashing-shield line. Care should be taken
not to damage the roofing felts.
- Thoroughly clean the area free of all dust
and dirt.
- Apply Karnak #108 Asphalt Primer at a rate
of 1 to 2 gallons per 100 square feet, covering all surfaces
that will receive flashing cement or coating.
- Apply Karnak #19 or #19AF Flashing Cement
at the rate of 4 to 6 gallons per 100 square feet (on drains,
up to the flange but being careful not to cover weep holes).
- Embed Karnak #31 Fiberglass Membrane into
the freshly applied Flashing Cement, smoothing out any voids,
wrinkles or fishmouths.
- Apply a second coat over the mat with Karnak
No. 19 Flashing Cement.
SYSTEM APPLICATION
- Apply Karnak #78AF Cold Process Cement at
a rate of 6 gallons per 100 square feet.
- Embed Karnak #5540 Resat-Mat into the wet
coating carefully pressing the mat into the coating to displace
all trapped air.
- Apply a second coat of Karnak #78AF Cold Process
Cement at a rate of 4-5 gallons per 100 square feet.
Dated:
October 30, 1997 |
