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BUNDESANSTALT FÜR MATERIALFORSCHUNG UND - PRÜFUNG (BAM)

German Federal Institute for Materials Research and Testing

Digest from : TEST CERTIFICATE A.Z. 2.41/23 467

 

Content of application
Testing a roof for resistance to flying brands and radiant heat in accordance with DIN 4102 Part 7, as well as normal inflammability (Construction class B2) in accordance with DIN 4102 Part 1

 

Classification Resistance to flying brands and radiant heat for a roof slope of up to 30 degrees as well as construktion class B2.

Test material
Seamless roof skin made of "aluminized single-component polyurethane" termed "EVERLAST Roof Skin" by the applicant. See document 2 for details.
  • Delivered on: 29-7- 1991 by the applicant
  • Sampling : official
  • Markings: none

1 Description of the test roof
1.1 Test material

a) Base for roof construction:

For the base, boarding made of approx. 20 mm thick spruce boards were used in accordance with DIN 4102 Part 7, unplaned, straightened at the long edges and butted up tightly against each other.

b) Two layers of glas fleece bitumen roof strips , V 13 , to DIN 52 143, were nailed onto the base of the roof.

c) Roofing coating sytem, consisting of a liquid "aluminized single-component polyurethane" .

1.2 Production of the test roof

The test roof required for the roof test was made of the test materials listed in detail in Section 1.. on July 15, 1991 in the factory of the applicant, and stored in a factory shed at a temperature of between 20 and 22 degrees Celsius up till the time of the test on July 29 1991. Due to the lack of space, it was not possible to store in a standard climate 23/50 to DIN 50 015.

The applicant supplied the following information on the roof coating system mentioned under (c):

The liquid "aluminized single-component polyurethane" combines directly and irreversibel with the base and is a permanently elastic seamless seal for permanent sealing of roof surfaces.

Thickness of cured coating: approx. 2 mm

Coverage of liquid plastic approx. 1,5 kg /m2

Density in accordance with DIN 53 479 : 1,2 to 1,24 g/cm3

Colour : silver grey


2 Conducting the test
2.1 Testing for normal inflammability

The test was conducted at the BAM and in accordance with DIN 4102 Part 1 , Section 6.2 (flaming edges)

2.2 Testing for resistance to flying brands and radiant heat

The test was conducted at the Fire Service Training School at Müggenburger Strasse, belonging to the Hamburg Fire Brigade.It was conducted in accordance with DIN 4102 Part 7 with a roof pitch of 15 degrees and of 30 degrees.

In the test series, the wire basket was hung three times over the centre of a free area (A, B and C at 15 degrees pitch) and twice over the centre of a free area (D and E at 30 degrees pitch) (see. Picture 2 ). The behaviour of the roofing surface was observed during the tests.


3 Test results
3.1 Normal inflammability

It was ascertained during the test for normal inflammability (Construction Materials Class B2) that seamless roof skin made of "aluminized single-component polyurethane" complies with the requirements for normally inflammable construction materials.

3.2 Resistance to flying brands and radiant heat.

The observations and measured readings from the tests carried out on 15 degrees and 30 degrees pitched roofs are summarized in Table 1 and in Table 2 . Picture 1 shows the test roof before the test.

There was no evidence in any of the tests of the undersurface catching fire.Neither were any burning or glowing particles seen to fall through.

After the test it was established that the seamless roof skin made of aluminized single-component polyurethane (see Section 1.1c ) had been destroyed in the area of the fire surface.The glass fleece bitumen roofing strips V13 (see Section 1. 1b) were not destroyed.

The measurements of the destroyed areas of the roof superstructure and the maximum destroyed depth of the sub-construction can be seen from Table 1 and from Table 2 . Picture 3 shows the test roof after the tests.


4 Conclusions
The roof having the construction stated in Section 1 can be classed as resistant to flying brands and radiant heat in accordance with DIN 4102 Part 7 for a roof pitch up to 30 degrees.(Table 3)

5 Special note This test certificate will cease to be valid 5 years after its issue, should the testing regulations and assessment criteria being technologically updated, do not prematurely change. The validity of the application can be extended on request.
  • first extension granted on 14. March 1996
  • second extension granted on 22. May 2001

Pictures
Picture 1: Test roof: seamless roof skin made of aluminiumized single-component polyurethan "EVERLAST" prior to testing.
Picture 2: Testing arrangement: Placement of basket with roof pitch of 15 degrees and 30 degrees
Picture 3: Test roof: seamless roof skin made of aluminized single-component polyurethane "EVERLAST" 15 degree and 30 degree roof pitch after the tests

Tables
Table 1: Observations and measurements on test roof with 15 degrees roof pitch
Table 2: Observations and measurements on test roof with 30 degrees roof pitch.
Table 3: Summary of main test results .

References Bundesanstalt für Materialforschung und -prüfung BAM
Unter den Eichen 87
12205 Berlin
Germany