Installation Instructions

19
T-JOINTS
A T-Joint is formed when two layers of RoofKit Rubber
Roong Membrane form a seam that travels under, or over,
a third layer of membrane. The center of the “T”is where the
middle layer ends and the top layer bridges over the middle
layer. This T-Joint can provide an opportunity for water to seep
under the membrane. To avoid problems at this area, a T-Joint
patch should be installed as follows:
1. Clean the membrane with Seam Primer at least four inches
(4") in all directions from the T-Joint and allow to dry.
2. Cut a piece of Tape Flashing three inches (3") larger than the
T-Joint and round all corners. A single T-Joint patch can be
made large enough to accommodate more than one T-Joint,
as shown in Figure 17D (see page 21).
3. Remove the backing, place over the T-Joint and roll with a
steel or hard rubber roller.
4. Use Rubber Caulk to seal all edges of T-Joint patches.
Where T-Joint Patches Are Required
Rubber
Caulk