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  2. AIRTIGHTNESS AND WATERPROOFING
  3. MEMBRANES
  4. BYTUM
  5. BYTUM BASE 2500

SELF-ADHESIVE BITUMINOUS MEMBRANE

BYTUM BASE 2500

The BYTUM BASE 2500 self-adhesive bituminous membrane is the ideal solution on flat roofs in combination with the BYTUM SLATE 3500 slated membrane as the final visible layer. The polymer-modified bituminous compound ensures flexibility and workability even at low temperatures, and allows installation without the use of naked flames or heat.

BYTUM BASE 2500, the self-adhesive bituminous membrane that simplifies installation.

The screen-printed film makes installation extremely easy. The adhesive compound and the polyester surface finish allow perfect self-sealing of the membrane. Used on slopes up to 5° as an underlay, this adhesive bituminous membrane guarantees excellent water tightness.

Documents

Technical data sheets
Declaration of performance (DOP) Download
Recommendations for installation

BYTUM BASE 2500

CODE description liner H
[m]
L
[m]
A
[m²]
H
[ft]
L
[ft]
A
[sft]
pcs./pallet
BYTBASE2500 BYTUM BASE 2500 LINER 500/500 1 10 10 3.29 33 108 29

Technical Data
EN 13707
national-classifications AT Önorm B4119 E-do nsk
national-classifications CH SIA 232 V.v.o. H > 90mm UD (fu)
national-classifications DE ZVDH USB-B UDB-C
national-classifications FR DTU 31.2 E1 Sd3 TR1
national-classifications IT UNI 11564 P SR1 A
BITUMEN B A SED

Mass per unit area EN 1849-1 ca. 2550 g/m² ca. 8.36 oz/ft²
Thickness EN 1849-1 2 mm 79 mil
Water vapour transmission (Sd) EN 1931 ca. 200 m ca. 0.017 PERM
MD/CD tensile strength EN 12311-1 400 / 300 N/50mm 46 / 34 lb/in
Elongation MD/CD EN 12311-1 35 / 35 % -
Resistance to nail tearing MD/CD EN 12310-1 120 / 120 N 27 / 27 lbf
Watertightness EN 1928 60 kPa -
Thermal resistance - -40 / 100 °C -40 / 212 °F
Reaction to fire EN 13501-1 class E -
Thermal conductivity (λ) - 0,17 W/(m·K) 1.18 (BTU·in)/(h·ft²·°F)
Specific heat - 170 J/(kg·K) -
Density - ca. 1250 kg/m³ -
Water vapour resistance factor (μ) - ca. 100000 -
Joint strength EN 12317-2 300 / 200 N/50mm 34.260883 / 22.840589 lb/in
Joint detachment resistance EN 12316-1 - -
UV stability EN 13859-2 3 months -
Exposure to weather - 3 weeks -
After artificial ageing - watertightness EN 1297 / EN 1928 class W1 -
After artificial ageing - maximum tensile force MD/CD EN 1297 / EN 12311-1 300 / 200 N/50mm 34 / 23 lb/in
After artificial ageing - elongation EN 1297 / EN 12311-1 35 / 35 % -
Flexibility at low temperatures EN 1109 -20 / °C -4 / °F
Hot sliding EN 1110 100 °C 212 °F
Application temperature - 10 / °C 50 / °F
- Resistance to detachment at 90° (adhesion) ASTM D 2979 50 N 11.240451 lbf

Specifications

Supply and installation of self-adhesive bituminous membrane, type BYTUM BASE 2500
CE marking according to : EN 13707

Property:
–Mass per unit area : 2550
–Water vapour trasmission (Sd) (m) : 200
–Maximum tensile force MD/CD (N/50mm) : 400/300
–Elongation MD/CD (%) : 35/35
–Resistance to tearing MD/CD (N) : 120/120
–Watertightness (class) : 60kPa
–VOC emission (COV) (%(class A+)) : 0
–Temperature resistance (°C) : -40/+100
–Reaction to fire (class) : classe E

Indicazioni di posa per: PARETE

BYTUM BASE 2500 is laid parallel to the dock beam or the floor if laid on a wall. The second layer must be overlapped by at least 15 centimetres. Each layer must be fixed to the substrate with a mechanical fastener. (ex: HAMMER STAPLER, HAND STAPLER o PNEU STAPLER). It is also advisable to overlap the sheets by at least 30 centimetres at the butt joints. In order to achieve correct air and water sealing, we recommend the use of ALU BAND, SEAL BAND, EASY BAND, SPEEDY BAND, SOLID BAND, FLEXY BAND, SMART BAND, PLASTER BAND, DOUBLE BAND, SUPRA BAND, BUTYL BAND, MEMBRANE GLUE, SUPERB GLUE, ECO GLUE, FIRE SEALING, FIRE FOAM, FIRE STRIPE, FRONT BAND UV 234 or in the case of rough surfaces (such as rough OSB) FLEXI BAND, PRIMER SPAY, PRIMER .

Indicazioni di posa per: TETTO

BYTUM BASE 2500 is placed parallel to the eaves line, starting from the lower edge of the roof. The second layer must be overlapped by at least 10-20 centimetres to the previous one (depending on the slope of the roof), as indicated on the layout according to UNI 11470:2013. The sheet must be applied on a continuous support with a mechanical fastening device. (ex: HAMMER STAPLER, HAND STAPLER o PNEU STAPLER). Once at the top of the roof, it is advisable for the membrane to protrude beyond the ridge line by at least 30 centimetres to ensure a perfect overlap with the strips of sheet that will overlap on the other side of the roof. It is also recommended that the sheets overlap by at least 30 cm even at the end joints. To achieve correct air and water sealing, we recommend the use of ALU BAND, SEAL BAND, EASY BAND, SPEEDY BAND, SOLID BAND, FLEXY BAND, SMART BAND, PLASTER BAND, DOUBLE BAND, SUPRA BAND, BUTYL BAND, MEMBRANE GLUE, SUPERB GLUE, ECO GLUE, FIRE SEALING, FIRE FOAM, FIRE STRIPE, FRONT BAND UV 234.If there is an integrated double adhesive strip, it can replace the correct air and water sealing.

Composition

top layer PL film
compound elastoplastic polymeric distilled bitumen
REINFORCING LAYER PL stabilised with fibreglass
compound elastoplastic polymeric distilled bitumen
Adhesive layer distilled bitumen modified with self-adhesive polymer
release liner removable plastic film

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