Self adhering roofing membrane with an attached roofing underlayment
a technology of roofing membrane and roofing underlayment, which is applied in the direction of roof covering insulation, building components, construction materials, etc., can solve the problems of ice and water shield failure, damage to roof deck and interior of the structure,
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first embodiment
[0024]Referring now to the figures, FIG. 2 illustrates a weatherproof roofing underlayment product 10 for positioning between a roof support and a roof structure to provide a uniform waterproof barrier. The underlayment product 10 comprises a self-adhering ice and water roof barrier membrane 12, having a first outer layer 14, a second layer of protection material 16 and a third self-adhering adhesive layer 18. A roofing underlayment sheet 20 replaces the standard release liner Z3 on the ice and water barrier material Z1 of the prior art (FIG. 1). A release layer 22, typically of a silicone material, is positioned on the underlayment sheet 20.
[0025]As may best be seen in FIG. 3, in a preferred embodiment of the present invention, the underlayment sheet 20 is attached to and forms a seal 24 with either the first layer 14 or the second layer 16 (not shown). Optionally, as will be described later, a splittable adhesive could be used instead of the combination of a release liner and an a...
second embodiment
[0033]As shown in FIG. 3, in the present invention, the siliconized roofing underlayment layer 20 has a factory seal 24 to a top layer 14 on the ice and water barrier membrane 12. In order to apply the product 10, which comes in a rolled form, the roofer would reach under the product roll, and grasp one end of the roofing underlayment layer 20, pulling it away from the edge of the roof for application. This permits one-stage installation of both the roofing underlayment layer 20 and the ice and water barrier membrane layer 12.
third embodiment
[0034]FIG. 4 illustrates the present invention. While this embodiment also includes the factory seal 24 of the roofing underlayment 20 to the ice and water barrier membrane 12, it also includes use of a release liner 21, although at a significantly reduced size from that generally used in connection with typical ice and water barrier membranes. In this embodiment, as well as the embodiment of FIG. 2, an end 20a of the siliconized roofing underlayment layer overlaps with the release liner 21 (FIG. 4), or optionally, joins as a serrated edge with the release liner. When the product 10 is applied to the roof, the release liner 21 is placed nearer the roof edge. Removal of the release liner 21 provides a starting point for the roofer to unroll the roofing underlayment 20 away from the ice and water barrier membrane when installing the product. In contrast to the above embodiment, the roofer is not required to reach under the product to the same extent as in the above embodiment of FIG. ...
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Abstract
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