US Patent 7510752 Rolled membrane with compression spacers

A rolled membrane includes a core member and a membrane having a width defined by a first edge and a second edge. The membrane can be rolled around the core member such that the first edge and the second edge are exposed. A pre-applied seam tape having a substantially uniform thickness is affixed along the first edge. A first and second compression spacer may be located substantially adjacent to the seam tape and the second edge, respectively. The compression spacers have a thickness at least 0.005 inches greater than the thickness of the seam tape. The compression spacers are configured to allow the seam tape to remain in a substantially uncompressed state when the membrane is rolled and, therefore, avoid damage. The compression spacers allow the membrane to be rolled uniformly on the core member without telescoping and with a uniform cross-sectional diameter along the width of the rolled membrane.