CEN/TC 254/SC 1/WG 4 - General aspects

This European Standard specifies a method for the determination of the length, width and straightness of bitumen sheets for roofing.

This European Standard specifies a methods for the determination of "overall thickness" (method A) and "overall or component thickness" (method B) and "mass per unit area" of bitumen sheets for roofing. The determination of overall thickness by method A is only applicable to unembossed sheets. The determination of overall thickness by method B is applicable to embossed and unembossed sheets and can also be used for composite thickness measurements.

This European Standard specifies the determination of the visible defects of bitumen sheets for roofing, which could influence the functional behaviour of these sheets.

This European Standard specifies the general rules how to select the samples of bitumen, plastic or rubber sheets for roof waterpoofing from which the test pieces are taken. lt also specifies the conditioning procedures to be followed before the test piece is cut from the sample.
This standard is appliable in conjunction with product charateristics on bitumen, plastic and rubber sheets for roof waterproofing from which the test specimens are taken.