Owens Corning - Deckseal SA SBS Cap

Step 4

Lay the material flat on the roof aligned with the eaves edge at the lowest point on the roof.

One method to remove the release liner from the sheet of DeckSeal SA SBS Cap is as follows: 

Step 5

Fold the aligned sheet back half way, exposing the split release liner. See Fig. 1.

Step 6

Remove release liner at a 45° angle in a constant motion, while firmly holding the half of the sheet that is in contact with the roof in place as the liner is removed. See Fig. 1.

Now that the release liner is removed, roll the sheet and press firmly into place.

Now roll the opposite half of the sheet back and remove the release liner using the same method as above.

If additional pieces are needed to complete the starter course, the end lap to be overlapped must be cut at 45° angles on the top and bottom corners. See Fig. 2.

The top corner on the piece that is overlapping the previous piece must also be cut on the top corner at a 45° angle. See Fig. 2.

The overlap is to be 6 inches. Remove the release liner and adhere as with the previous sheet.

Remove the side lap selvage edge release film on the area to be overlapped.

Do not remove the remaining release film covering the side lap selvage edge at this time.

Step 7

The end of each roll of DeckSeal SA SBS Cap has a factory end lap selvage edge covered with a release film. Remove the end lap release film and press the overlapping sheet into place. See Fig. 3.

If necessary, during cool weather, hot air weld or apply modified asphalt flashing cement at all 45° cuts or at end lap seams and T-joints.

Where there is no factory selvage edge for end laps, the following methods can be used.

HOT AIR WELDING

The area between the granular surface and self-adhesive backing can be heated with a hot air welding tool and rolled with a hand roller. This will ensure a water tight seal to the end laps. See Fig. 4.

MODIFIED ROOF CEMENT

In lieu of hot air welding, the top layer can be set in a thin layer of modified asphalt flashing cement that is at least 6 inches wide and approximately 1/8 inch thick. Take care to prevent roof cement from oozing onto exposed area. If this should occur, sprinkle loose granules on the exposed asphalt immediately. See Fig. 5.

End laps must be a 6 inch minimum and fully adhered.

Step 8

Press each sheet into place with firm, even pressure.

Step 9

Roll edges and all lap seams firmly with a hand roller to ensure full adhesion. After each course is completed roll the course with an 80 pound linoleum roller. Start at the center and work outward to remove trapped air.

Step 10

Blind back-nailing of self-adhered cap sheet membrane every twelve (12) inches at lap location is required on all slopes greater than 1 inch per foot (1:12). Use galvanized steel, stainless steeel or aluminum nails with a min. 12 guage shank and 3/8 inch diameter head. Owens Corning recommends that fasteners comply with ASTM F1667.

For the succeeding course, position the next sheet by completely overlapping the selvage edge of the previous sheet. See Fig. 6.

Be sure to offset end laps on each subsequent course a minimum of 36 inches.

Only remove enough of the selvage edge release film on the preceding roll to complete each section of the install. Removing more film than is necessary may cause the exposed adhesive to stick to the release liner of subsequent sheets during alignment. See Fig. 7.

Remove release liner on succeeding course as previously described.

Step 11

After adhering rolls, it is required that uniform pressure be applied to the entire deck area using a 80 pound linoleum roller. Care must be taken to prevent injury when rolling, especially on sloped surfaces.