How and where to use guide

Typical applications and where to install

Earthwool Loft Roll 44 is primarily used for insulating cold loft spaces in domestic properties. It is most effective in lofts where you have adequate headroom and no restrictions on insulation thickness, allowing the full 200mm depth to be installed between or above joists. This product works well in standard pitched roof lofts, flat roof voids, and loft conversions where the space is not being used as a habitable room. The combi-cut format is particularly suited to lofts with standard joist spacings, as the pre-cut widths align with common UK timber dimensions, reducing on-site cutting and waste.

• Cold loft spaces in domestic properties
• Between joists or above existing insulation
• Lofts with unrestricted headroom and depth allowance
• Standard pitched and flat roof voids
• New build and retrofit insulation projects

Installation and on-site guidance

Begin by measuring your loft dimensions and joist spacing to confirm the combi-cut format suits your layout. Ensure the loft space is clear of debris and that any existing insulation is in good condition. Unroll the Earthwool Loft Roll 44 carefully across the joists, with the combi-cut edges aligned to your joist spacing. The pre-cut widths are designed to fit standard spacings, minimising trimming. Lay the roll perpendicular to the joists, ensuring it sits evenly without compression or gaps. If you need to cut the material to length, use a sharp utility knife or insulation saw on a clean, flat surface. Butt-join rolls end-to-end without overlapping, and ensure full coverage across the loft floor area. Always wear appropriate personal protective equipment including gloves, a dust mask, and eye protection when handling and installing mineral wool.

• Measure loft dimensions and joist spacing before installation
• Clear the loft space of debris and check existing insulation condition
• Lay rolls perpendicular to joists with combi-cut edges aligned
• Use sharp tools to cut material to length if required
• Butt-join rolls without overlapping; ensure full coverage
• Wear gloves, dust mask, and eye protection during installation

Limitations and important considerations

Earthwool Loft Roll 44 is designed for cold loft applications only and should not be installed in warm roof or habitable loft spaces without additional ventilation and vapour control measures. The 200mm thickness requires adequate headroom; if your loft has restricted depth, consider a thinner product. This product is not suitable for areas subject to moisture or condensation without proper ventilation. Do not compress the insulation during or after installation, as this reduces its thermal effectiveness. Ensure adequate ventilation is maintained in the loft space to prevent moisture accumulation. The product should not be used in areas exposed to direct water contact or in external applications.

• Cold loft applications only; not for warm roof or habitable spaces without additional measures
• Requires 200mm depth allowance; unsuitable for restricted headroom
• Maintain loft ventilation to prevent condensation and moisture issues
• Do not compress the material; compression reduces thermal performance
• Not suitable for areas with direct water exposure or external use

Maintenance and durability

Once installed, Earthwool Loft Roll 44 requires minimal maintenance. Periodically inspect the loft space to ensure the insulation remains in place and has not been disturbed or compressed by storage items. Avoid placing heavy loads directly on the insulation, as this will reduce its effectiveness. Check that loft ventilation remains clear and unobstructed to prevent moisture build-up. If the loft is to be used for storage, consider installing boarding or a platform above the insulation to protect it and distribute weight evenly. The product will maintain its thermal properties for the life of the building when kept dry and undisturbed. If any section becomes wet or damaged, it should be replaced to restore full insulation performance.