Thermaflex insulation THERMAWOOL 35/50 mineral wool roll 1 m (DWZ)

THERMAFLEX THERMAWOOL 35/50 mineral wool roll 1 m (DWZ) is a flexible insulation roll designed for thermal and acoustic performance in building envelopes and services. The roll format allows straightforward cutting and fitting into cavities, between studs, across ceilings and floors, and around ducts or pipes. It is intended for both renovation and new-build projects where a compressible, easy-to-install mineral wool product is required.

Advantages

THERMAWOOL 35/50 provides combined thermal insulation and sound absorption properties in a single material, helping to reduce heat loss and dampen airborne noise. The flexible roll form ensures efficient filling of irregular spaces and fast installation, reducing labor time on site. Being mineral wool, the product is non-combustible and dimensionally stable, maintaining performance over time under normal building conditions.

Suitable for

• Insulation of stud walls and partition walls
• Ceiling and loft insulation to improve thermal and acoustic comfort
• Underfloor and between-joist insulation in residential and commercial buildings
• Insulation around ductwork and service pipes where flexible mineral wool is needed

Key specifications

• Material: mineral wool (glass/rock wool family)
• Form: roll, 1 m length for convenient handling and cutting
• Thickness range suitability: intended for typical wall, floor and ceiling cavities (check cavity depth before installation)
• Performance: thermal insulation and sound absorption properties suitable for building envelope and internal partitions
• Fire behavior: non-combustible material (inherent to mineral wool)
• Compatibility: can be compressed slightly to fit between framing and ducts without losing insulating properties

How to use

Measure the cavity or area to be insulated and cut the roll to the required length using a sharp knife or insulation saw. Fit the mineral wool roll into the cavity ensuring a snug but not overly compressed placement so that the material fills the space and contacts surrounding surfaces. For ceilings and horizontal installations, support the roll as required until the finishing layer (plasterboard or decking) is fixed. Seal gaps at joints and around services to maintain thermal continuity.

Usage recommendations

Use appropriate personal protective equipment such as gloves, long sleeves and eye protection during cutting and installation to avoid skin and eye irritation. Follow local building regulations and guidelines for insulation thickness and fire safety. Store rolls in a dry place prior to installation to preserve thermal and acoustic performance.