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HOME AIRTIGHTNESS AND WATERPROOFING MEMBRANES BYTUM BYTUM 400

BYTUM 400

BITUMINOUS UNDERLAY CONTROL LAYER

BYTUM 400 bituminous underlay control layer is the lightest bitumen-based membrane in our range. Despite its limited thickness, it ensures great mechanical strength and durability thanks to the reinforcing layer.

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EN 13859-1
national-classifications AT Önorm B4119 E-do nsk
national-classifications CH SIA 232 V.v.o. H > 90mm UD (g)
national-classifications DE ZVDH USB-A UDB-A
national-classifications FR DTU 31.2 E1 Sd3 TR2
national-classifications IT UNI 11564 P SR2 A
national-classifications AUS AS/NZS 4200.1 Class 2
national-classifications USA IRC Class 2
BITUMEN B A SED

Description

BYTUM 400, the bituminous underlay control layer that ensures manageability and flexibility.

This bituminous underlay control layer is designed for installation on the outer side of the roof. It can also be used as a vapour control membrane, especially on uneven surfaces such as concrete floors and similar.

Documents

BYTUM 400

CODE description tape H
[m]
 L
[m]
 A
[m²]
 H
[ft]
 L
[ft]
 A
[sft]
 pcs./pallet
DOP
BYT400 BYTUM 400 - 1 50 50 3' 3 3/8'' 164 538 20

Technical Data

EN 13859-1
national-classifications AT Önorm B4119 E-do nsk
national-classifications CH SIA 232 V.v.o. H > 90mm UD (g)
national-classifications DE ZVDH USB-A UDB-A
national-classifications FR DTU 31.2 E1 Sd3 TR2
national-classifications IT UNI 11564 P SR2 A
national-classifications AUS AS/NZS 4200.1 Class 2
national-classifications USA IRC Class 2
BITUMEN B A SED
Property Standard Tested Values USC Conversion
Mass per unit area EN 1849-1 400 g/m² 1.31 oz/ft²
Thickness EN 1849-2 0,6 mm 24 mil
Water vapour transmission (Sd) EN 1931 22 m 0.159 US perm
Tensile strength MD/CD EN 12311-1 500 / 400 N/50mm 57 / 46 lbf/in
Elongation MD/CD EN 12311-1 45 / 50 % -
Resistance to nail tearing MD/CD EN 12310-1 200 / 200 N 45 / 45 lbf
Watertightness EN 1928 compliant -
Resistance to temperature - -45 / 100 °C -49 / 212 °F
Reaction to fire EN 13501-1 class E -
Resistance to penetration of air EN 12114 < 0,02 m³/(m²·h·50Pa) < 0.001 cfm/ft² at 50Pa
Thermal conductivity (λ) - 0,2 W/(m·K) 0.12 BTU/(h·ft·°F)
Specific heat - 120 J/(kg·K) -
Density - ca. 600 kg/m³ -
Water vapour resistance factor (μ) - ca. 36000 -
UV stability (1 ) - 336h (3 months) -
Exposure to weather - 3 weeks -
Watertightness after artificial ageing EN 1297 / EN 1928 compliant -
After artificial ageing - Tensile strength MD/CD EN 1297 / EN 12311-1 450 / 350 N/50mm 51 / 40 lb/in
After artificial ageing - elongation EN 1297 / EN 12311-1 35 / 40 % -
Flexibility at low temperatures EN 1109 -45 °C -49 °F
1.

Composition

TOP LAYER non-woven PP fabric
compound bituminous mixture
REINFORCING LAYER PL fabric
compound bituminous mixture
BOTTOM LAYER non-woven PP fabric

Specifications

BYTUM 400
Supply and installation of bituminous underlay membrane for roof tiles, type BYTUM 400.

Composition

From top layer to bottom layer:

  • non-woven PP fabric;

  • bituminous mixture;

  • PL fabric;

  • bituminous mixture;

  • non-woven PP fabric.

Properties

  • Mass per unit area [g/m²]: 400

  • Thickness [mm]: 0,6

  • Water vapour transmission (Sd)[m]: 22

  • Tensile strength MD/CD [N/50 mm]: 500/400

  • Elongation MD/CD [%]: 45/50

  • Resistance to nail tearing MD/CD [N]: 200/200

  • Watertightness (2 kPa): comply with (EN 1928)

  • Resistance to temperature [C°]: -45/100

  • Reaction to fire: class E (EN 13501-1)

  • UV stability: 336h (3 months)

Standards and certifications

  • CE marked in accordance with EN 13859-1

  • AUS 4200.1 Class 2

Description

The application surface must be dry, free of dust and grease. Surface elements must be removed so that the membrane is not damaged during application.

Recommended use: The membrane is designed for applications on the exterior side of the roof.

It can also be used as a vapour control membrane on uneven surfaces such as concrete floors.

Installation: Unroll the membrane and fasten each layer to the substrate using a mechanical fastener to ensure installation stability.

Proceed by sealing using tape such as: FLEXY BAND, FLEXY BAND UV, SPEEDY BAND, or EASY BAND.