Façade Solutions & Their Functions In The Through-Wall Construction
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Breather Membranes Class A & Class B
Interface Sealing Membranes (ISM’s) Class A, Class B & EPDM
Score ‘N’ Snap Sheathing Board Class A
Vapour Control Layer (VCL) Class A & Class B
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Breather Membranes
What is it? A Breather Membrane is a fire-classified, microporous membrane that provides a vapour- permeable protective layer around buildings. Where is it used? Breather Membranes are secured horizontally or vertically to the sheathing board using double-sided tape, and sealed at joints/ overlaps/edges using UV Facade Tape. Why do we use it? The Breather Membrane provides a weather resistive layer, whilst at the same time, allowing vapour to escape from the cavity, and thus reducing the risk of condensation and vapour build-up.
BREATHER MEMBRANES Harmonised Standard
MIN. REQUIREMENT
OBEX CORTEX 0521FR
OBEX CORTEX 0520FR
OBEX CORTEX 0220FR
OBEX CORTEX 0221FR
OBEX CORTEX 0223FR
STANDARD
EN 13859-2 Compliance
Compliant
Compliant
Compliant
Compliant
Compliant
Fire Classification EN 13501-1 B-s3,d0 minimum B-s1,d0
B-s3,d0
A1
A2-s1,d0
A2-s1,d0
Water Penetration
EN 1928
W1/W2
W1
W1
W2
W2
W1
Airtightness
EN 12114
<0.1m³ leakage
0 m³/h/m²
<0.1m³
84m³
84m³
<0.1m³
Water Vapour Transmission
EN ISO 12572 Set C
<0.12m
0.1m
0.1m
0.03m
0.03m
0.08m
> 100N/50mm (MD, CD)
Tensile Strength EN 12311-2
255 / 180
255 / 180 3828 / 1992 3828 / 1992 2968 / 3253
Tear Strength
EN 12310-2 > 80 N (MD, CD)
100 / 106
100 / 106
356 / 424
356 / 424
577 / 453
Cold Temperature Flexibility
EN 495-5, EN 1109
-40°C
Pass
Pass
Pass
Pass
Pass
UV & Heat Ageing EN 1296/1297 Pass - watertight
Pass
Pass
Pass
Pass
Pass
Service Temperature
-40°C to >+70°C
Yes
Yes
Yes
Yes
Yes
UV resistance
6 months
Yes
Yes
Yes
Yes
Yes
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What is it? An Interface Sealing Membrane is a fire-classified material that’s bonded to window and façade interfaces to provide a watertight and airtight seal. Where is it used? Using fire-classified Paste Adhesive, Interface Sealing Membranes are used specifically to provide watertight & airtight seal around windows, doors, curtain walling and board/slab-edge interfaces and many other applications Why do we use it? We use Interface Sealing Membranes at these specific locations because they meet the demanding weathering performance requirements at high risk locations, and they also meet the fire classifications required by Regulation 7 and Approved Document B. ISM’s (Interface Sealing Membranes)
What ageing testing is required? 90-day 70°C heat age (EN 1296) – Tested to EN 1931 (WVT) and/or EN 1928 watertightness (2kPa for 24 hours)
OBEX CORTEX 0200FR
OBEX CORTEX 0500FR
OBEX CORTEX 0560FR
OBEX CORTEX EPDM
ISM’S & EPDM STANDARD
MIN. REQUIREMENT
Harmonised Standard
EN 13984
Compliance
Compliant
Compliant
Compliant
Compliant
Class E, combustible
Fire Classification EN 13501-1
B-s3,d0 minimum
A2-s1,d0
B-s3,d0
B-s3,d0
Water Penetration EN 1928
Pass, 2kPa for 24 hours
Pass
Pass
Pass
Pass
Airtightness
EN 12114
<0.1m³ leakage
<0.1m³
<0.1m³
<0.1m³
<0.1m³
Water Vapour Transmission
EN 1931
>5m
>50m
12m
12m
37.5m
Tensile Strength EN 12311-2
> 250N/50mm (MD, CD)
7767 / 3973
2490 / 2079
2490 / 2079
> 7Mpa
Tear Strength
EN 12310-2
> 10 N (MD, CD)
519 / 436
230/230
429/452
10
Cold Temperature Flexibility
EN 495-5, EN 1109
-40°C
Pass
Pass
Pass
Pass
UV & Heat Ageing EN 1296/1297 Pass - watertight
Pass
Pass
Pass
Pass
Service Temperature
-40°C to >+70°C
Yes
Yes
Yes
Yes
Flexibility
Flexible
Yes
Yes
Yes
Yes
Class E, combustible Class E, combustible
Paste adhesive
Class B minimum
Yes, A2-s1,d0
Yes, B-s1,d0
Yes, B-s1,d0
Primer
Class B minimum
Yes, B-s1,d0
Yes, B-s1,d0
Yes, B-s1,d0
Ease of Installation
Good
Very Good
Good
Very Good
Good
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What is it? A Vapour Control Layer is an air/vapour- tight membrane that is installed internally to increase airtightness, improve moisture management and energy efficiency. VCL (Vapour Control Layer) Where is it used? The VCL is fixed to the internal side of the Steel Framing System using double-sided tape, and sealed at the edges with UV Façade Tape. Why do we use it? A VCL provides an airtight layer which minimises the amount of warm/moist air that enters the fabric of the building and to protect the structure from degradation due to condensation and vapour build up.
OBEX CORTEX 0230FR
OBEX CORTEX 0530FR
VCL’S
STANDARD
MIN. REQUIREMENT
Harmonised Standard
EN 13984
Compliance
Compliant
Compliant
Fire Classification
EN 13501-1
B-s3,d0 minimum
Class A2-s1,d0
B-s1,d0
Water Penetration
EN 1928
Pass, 2kPa for 24 hours
Pass
Pass
Airtightness
EN 12114
<0.1m³ leakage
<0.1m³
0m³/h/m² (+/- 100 Pa)
Water Vapour Transmission EN 1931
>1500m
2575.35m
100m
Vapour resistance
EN 1931
12,874 MNs/g
500 MNs/g
Tensile Strength
EN 12311-2
> 1000/50mm (MD, CD)
1362 / 1349
160 / 155
Tear Strength
EN 12310-2
> 100 N (MD, CD)
150 / 150 N
142 N
Heat Ageing
EN 1296
Pass
Pass
Pass
Service Temperature
-40°C to >+70°C
Yes
Yes
Ease of Installation
Good
Good
Good
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Sheathing Board
What is it? An external sheathing board is a fire-classified cement-based board which is highly resistant to weathering and provides a surface for mounting items such as breather membranes and facade systems. Where is it used? The sheathing board is usually fixed to the outside of the Steel Framing System using self-drilling screws. Why do we use it? A sheathing board is installed onto the SFS frame to make a building weather-tight as quickly as possible so that internal trades can start earlier in the construction process. Sheathing boards also provide thermal, acoustic and fire resistance properties which contribute to the performance of the building.
MIN. REQUIREMENT
OBEX CORTEX 0270FR
SHEATHING BOARD
STANDARD
Harmonised Standard
EN 12467
Category B
Category B - pass
Fire Classification
EN 13501-1
A2-s1,d0 minimum
Class A1
Modulus of Rupture
EN 12467
Class 1
Class 1
Water Impermeability
EN 12467
No drops
Pass, no drops
Durability - Freeze-thaw
EN 12467
Pass
Pass
Durability - Heat-rain
EN 12467
Pass
Pass
Durability - Warm water
EN 12467
Pass
Pass
Durability - Soak-dry
EN 12467
Pass
Pass
Density
EN 12467
≥625kg/m³
1000kg/m³
Weight
Less than 40kg
36kg
Health & Safety
Good
Excellent
Ease of Installation
Good
Excellent
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