1 2 4
1 2 З? 4 5 6 7 CONTENTS
page
1 Scope 1
2 Normative references 1
3 Definitions 2
4 Principle . 2
5 Sampling and preparation of test
specimens 2
6 Procedure 3
7 Test report 3
EN 1850-1:1999 - - - -
FLEXIBLE SHEETS FOR WATERPROOFING.DETERMINATION OF VISIBLE DEFECTS.
Part 1. Bitumen sheets for roof waterproofing
1 1 Scope
This European Standard specifies the determination of the visible defects of bitumen sheets for roofing, which could influence the functional behavior of these sheets.
2 prEN 13416 2 Normative references
This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies.
prEN 13416 Flexible sheets for waterpnoofing - Bitumen, plastic and rubber sheets for roof waterproofing - Rules for sampling 1 )
1 )
З? 3.1 3.2 3.3 3.4 4 For the purpose of this standard, the definitions indicated in 3.1 to 3.4 apply.
3.1 blister: An elevation of the surface of varied contour and dimensions, with a cavity beneath it.
3.2 crack: A fissure that penetrates the external surface of the material or its entire thickness, the bitumen material being completely separated between the walls of the fissure.
3.3 hole: An opening through the sheet which would allow the passage of water.
3.4 naked spots 2 >: A missing area of mineral surface exceeding 100 mm 2 .
4 Principle
A selected roll of bitumen sheet is unrolled on a flat surface and examined for visible defects.
5 5.1 5.2 5 Sampling and preparation of test specimens
5.1 Sampling
A complete undamaged roll of the bitumen sheet to be tested shall be selected in accordance with prEN 13416.
5.2 Conditioning of specimens
Generally no ageing or conditioning shall be carried out and examinations shall be made under ambient conditions.
In case of dispute, the examinations should be carried out at (23 + 2)
2> Only for mineralised cap sheets.
6 6 Procedure
The selected roll shall be laid on a flat surface. The sheet is carefully unrolled, top surface uppermost and examined over the whole surface, with the naked eye, for the presence of blisters, cracks, holes or naked spots or any other noticeable defect. The sheet is then carefully turned over and examined on the underside for visible defects.
7 а?) Ь?) 7 Test report
The test report shall include at least the following information:
a) all details necessary to identify the product tested;
b) a reference to this European Standard (EN 1850-1) and any deviation from it;
c) information on sampling and preparation of the test specimens in accordance with clause 5;
d) visible defects in accordance with clause 6;
e) the date of the test.