EN 14891 : 2017 - norms for liquid applied waterproofing membrane

EN 14891 : 2017  - norms for liquid applied waterproofing membrane (single or multiple components) which can be used under / beneath ceramic tiles with tile adhesives.

 

Let us see what are the requirements put by EN 14891:

Basic characteristics that liquid applied waterproofing membrane absolutely has to have.

Optional characteristics for specific service condition where enhanced levels of performances or which provide further information about its general performance for liquid applied waterproofing membrane  

1 a              BASIC CHARACTERISTICS (CM – DM – RM)
Characteristic	Requirement		Test method
Initial tensile adhesion strength	≥ 0,5 N/mm2		A.6.2
Tensile adhesion strength after water contact	≥ 0,5 N/mm2		A.6.3 or A.6.4
Tensile adhesion strength after heat ageing	≥ 0,5 N/mm2		A.6.5
Tensile adhesion strength after freeze–thaw cycles	≥ 0,5 N/mm2		A.6.6
Tensile adhesion strength after contact with lime water	≥ 0,5 N/mm2		A.6.9
Waterproofing	No penetration and ≤ 20 g weight gain		A.7
Crack bridging ability under standard conditions	≥ 0,75 mm		A.8.2
1 b              OPTIONAL CHARACTERISTICS
Characteristic		Requirement	Test method
Tensile adhesion strength after contact with chlorinated water (P)		≥ 0,5 N/mm2	A.6.7 or A.6.8
Crack bridging ability at low temperature (- 5°C) (O1)		≥ 0,75 mm	A.8.3
Crack bridging ability at very low temperature (- 20°C) (O2)		≥ 0,75 mm	A.8.3

 

Table 4 — Classification and designation of liquid-applied water impermeable products

SYMBOL		DESCRIPTION
TYPE	CLASS
CM		Normal cementitious liquid-applied water impermeable product
DM		Normal dispersion liquid-applied water impermeable product
RM		Normal reaction resin liquid-applied water impermeable product
CM	O1	Cementitious  liquid-applied  water  impermeable  product  with  improved crack bridging ability at low temperature (−5°C)
CM	O2	Cementitious  liquid-applied  water  impermeable  product  with  improved crack bridging ability at very low temperature (−20°C)
DM	O1	Dispersion  liquid-applied  water  impermeable  product  with  improved  crack bridging ability at low temperature (−5°C)
DM	O2	Dispersion  liquid-applied  water  impermeable  product  with  improved  crack bridging ability at low temperature (−20°C)
RM	O1	Reaction resin liquid-applied water impermeable product with improved crack bridging ability at low temperature (−5°C)
RM	O2	Reaction resin liquid-applied water impermeable product with improved crack bridging ability at very low temperature (−20°C)
CM	P	Cementitious liquid-applied water impermeable product resistant to contact with chlorinated water
DM	P	Dispersion liquid-applied water impermeable product resistant to contact with chlorinated water
RM	P	Reaction  resin  liquid-applied water impermeable  product resistant  to  contact with chlorinated water
CM	O1P	Cementitious  liquid-applied  water  impermeable  product  with  improved crack bridging ability at low temperature (−5°C) and resistant to contact with chlorinated water
CM	O2P	Cementitious  liquid-applied  water  impermeable  product  with  improved crack bridging ability at very low temperature (−20°C) and resistant to contact with chlorinated water
DM	O1P	Dispersion liquid-applied water impermeable product with improved crack bridging ability at low temperature (−5°C) and resistant to contact with chlorinated water
DM	O2P	Dispersion liquid-applied water impermeable product with improved crack bridging ability at very low temperature (−20°C) and resistant to contact with chlorinated water
RM	O1P	Reaction resin liquid-applied water impermeable product with improved crack bridging ability at low temperature (−5°C) and resistant to contact with chlorinated water
RM	O2P	Reaction resin liquid-applied water impermeable product with improved crack bridging ability at very low temperature (−20°C) and resistant to contact with chlorinated water

 

Whereas,

CM         cementitious liquid-applied water impermeable products;

DM         dispersion liquid-applied water impermeable products;

RM         reaction resin liquid-applied water impermeable products.

O1          with improved crack bridging ability at low temperature (−5°C);

O2          with improved crack bridging ability at very low temperature (−20°C);

P             resistant to contact with chlorinated water (i.e. for use in swimming pools).