DBRED DUETTO

LAMINATED UNDERLAY ROLL FOR IMPACT SOUND INSULATION

DBRED DUETTO is a laminated underlay in rolls for impact sound insulation: SBR rubber granules and fibers bound with MDI polyurethane resin, thermally bonded to a layer of cross-linked polyethylene. It combines the elasticity and long-term durability of rubber with the polyethylene's waterproofing and ease of taping.

Thanks to the polyethylene on top, no extra waterproofing layer is needed before casting the screed. Two versions: F3+3 (0.236 in (6 mm), ΔLw 29 dB) and F5+4 (11/32 in (9 mm), ΔLw 38 dB) for the highest acoustic requirements.

NOTE

ΔLw up to 38 dB
Rubber durability, PE waterproofing
No separate vapor layer needed

DUETTO F3+3: 0.118 in (3 mm) SBR + 0.118 in (3 mm) PE = 0.236 in (6 mm); rolls 59 × 276 in (150 × 700 cm) (113 ft² (10.5 m²)), 15 rolls per pallet (1,695 ft² (157.5 m²)); 0.45 lb/ft² (2.22 kg/m²); λD 0.34 BTU·in/(h·ft²·°F) (0.049 W/(m·K)); CP2; s' 195 lbf/in³ (53 MN/m³); ΔLw 29 dB; L'nw 59 / 57 / 56 dB with 1 5/8 / 2 3/8 / 3 1/8 in (4 / 6 / 8 cm) screed.
DUETTO F5+4: 0.197 in (5 mm) SBR + 5/32 in (4 mm) PE = 11/32 in (9 mm); rolls 47 1/4 × 591 in (120 × 1500 cm) (194 ft² (18 m²)), 6 rolls per pallet (1,163 ft² (108 m²)); 0.59 lb/ft² (2.88 kg/m²); λD 0.37 BTU·in/(h·ft²·°F) (0.054 W/(m·K)); CP2; s' 129 lbf/in³ (35 MN/m³); ΔLw 38 dB; L'nw 52 / 48 / 48 dB with 1 5/8 / 2 3/8 / 3 1/8 in (4 / 6 / 8 cm) screed.
Rubber service temperature -40 / 239 °F (-40 / +115 °C); fire class B2 (DIN 4102).

PACKAGING

Impact sound insulation under floating screeds in residential and commercial buildings.
Floors with high acoustic requirements (F5+4).
Joints sealed with dBred adhesive tapes.

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