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
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| Declaration of performance (DOP) | Download |
Recommendations for installation
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BYTUM BASE 2500
| CODE | description | liner | H
[m]
|
L
[m]
|
A
[m²]
|
H
[ft]
|
L
[ft]
|
A
[sft]
|
pcs./pallet |
|---|---|---|---|---|---|---|---|---|---|
| BYTBASE2500 | BYTUM BASE 2500 | 500/500 | 1 | 10 | 10 | 3' 3 3/8'' | 33 | 108 | 29 |
Technical Data
| Property | Standard | Tested Values | USC Conversion |
|---|---|---|---|
| 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 |
| Tensile strength MD/CD | 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 - tensile strength 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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