Knauf Insulation Loft Roll 44 Combi-Cut Insulation - 100mm
This glass mineral wool loft insulation is supplied in combi-cut rolls for easy installation betwe...This glass mineral wool loft insulation is supplied in combi-cut rolls for easy installation between or over joists, and is suitable for pitched roof insulation. Supplied as a pallet of 24 rolls (333.24m²). Experience unparalleled thermal performance with the Knauf Loft Roll 44 Combi Cut Insulation. Perfectly designed for cold lofts with pitched roofs, this glass mineral wool roll ensures that the rising heat stays inside, offering you a cozy and warm environment. Benefit from the peace of mind knowing this product boasts the best possible Euroclass A1 reaction to fire classification, making it a safe and reliable choice for your home insulation needs. Additionally, it's lightweight, easy to install and can be adjusted to fit various widths, enhancing on-site efficiency. Manufactured using Knauf Insulation's innovative bio-based ECOSE® Technology, it's not only efficient but also environmentally friendly. The roll is also resistant to mould and bacteria growth, ensuring a healthier living space with zero ozone depletion potential (ODP) and zero global warming potential (GWP). Features & Benefits: Made with ECOSE® Technology: no added phenol or formaldehyde. Soft to touch with low dust and low VOCs. Uses recycled glass in production. Lightweight and easy to install for ceiling level pitched roofs and suspended timber floors. Resistant to mould and bacteria growth. Zero Ozone Depletion Potential (ODP) and zero Global Warming Potential (GWP). Fully compliant with BS EN 13501-1. Excellent thermal performance with 0.044W/mK thermal conductivity. Non-combustible with Euroclass A1 Reaction to Fire rating. Odourless and rot-proof. Combi-cut rolls provide flexibility for multiple roll widths: 2 x 570mm or 3 x 380mm Total Width: 1140mm Length: 12.18mtrs Thickness: 100mm Coverage: 13.89m2
Best current price£37.49from Materials Market Trading UK Ltd
The Knauf Insulation Loft Roll 44 Combi Cut (100mm) is designed for homeowners and contractors seeking effective thermal insulation for cold lofts and pitched roofs. Its key benefit is providing excellent thermal performance to keep homes warm and reduce energy costs, all while offering superior fire safety. A potential consideration is that it is supplied in a pallet of 24 rolls, which may be more than needed for smaller projects.
All features
Model Part Number
2404154
Brand
Knauf Insulation
Extended Product Information
FAQs
What is the R-value of the Knauf Loft Roll 44 (100mm)?
The R-value is approximately 2.27 m²K/W (for the material itself). Building regulations often specify total U-values for roof constructions which this product contributes to achieving.
Can this insulation be used in floors?
Yes, it is suitable for insulating suspended timber floors above unheated spaces.
Is this product safe to handle?
While generally safe when installed correctly, it is made of glass mineral wool. Always wear gloves, eye protection, and a dust mask during installation to avoid skin and respiratory irritation.
What does ECOSE® Technology mean for the user?
ECOSE® Technology means the insulation uses a bio-based binder with no added formaldehyde or phenol. This results in a product that is softer to touch, has less dust during handling, and releases lower levels of VOCs, contributing to a healthier indoor air quality.
How do I achieve a higher thermal performance?
You can achieve higher thermal performance by installing a second layer of insulation over the top of the joists, perpendicular to the first layer. This increases the total thickness and thus the R-value of the insulation system.
What are the dimensions of the combi-cut rolls?
Each pallet contains 24 rolls. Each individual roll has a thickness of 100mm, a length of 12.18 meters, and a total width of 1140mm. The combi-cut feature allows it to be split into two 570mm wide sections or three 380mm wide sections.
Does this insulation need a vapor barrier?
A vapor control layer may be required depending on the specific roof construction and climate. It is generally installed on the warm side of the insulation (i.e., the side facing the interior of the building) to prevent moisture buildup within the insulation. Consult relevant building regulations or a professional for specific requirements.
Troubleshooting
Rolls are difficult to cut.
Use a sharp, long-bladed insulation knife or a serrated knife for cleaner cuts. Ensure the insulation is laid flat on a stable surface before cutting.
Skin irritation after handling.
Always wear gloves and long sleeves when handling glass mineral wool. If irritation occurs, wash the affected area thoroughly with soap and water. Avoid scratching.
Insulation appears damp.
Ensure the insulation is stored in a dry environment. If installed in a damp area, investigate the source of moisture (e.g., roof leaks, condensation) and address it before or after installation.
Poor fit, leaving gaps.
Ensure the correct width of combi-cut rolls is used for the joist spacing. If custom cuts are needed, measure carefully and cut precisely to avoid gaps. Aim for a snug fit without compressing the material.
Pros and Cons
Pros
Superior thermal insulation to reduce heating bills.
Excellent fire safety with Euroclass A1 rating.
Easy to cut and install due to combi-cut design.
Healthier indoor environment due to low VOCs and ECOSE® Technology.
Resistant to mould, bacteria, and pests.
Made with recycled content and has zero ODP/GWP.
Cons
Supplied in a pallet of 24 rolls, which might be excessive for small jobs.
Requires appropriate personal protective equipment (PPE) during installation.
Glass mineral wool can be irritating to skin and respiratory system if not handled properly.
Setup, Compatibility & Care Instructions
Setup:
Preparation: Ensure the area to be insulated (loft or roof space) is clean, dry, and free from obstructions. Wear appropriate personal protective equipment (PPE), including gloves, eye protection, and a dust mask.
Cutting: Unroll the insulation. Use the pre-cut lines for either two 570mm rolls or three 380mm rolls. A sharp insulation knife or long-bladed knife is recommended for any custom cuts.
Installation: Lay the insulation between the joists first, ensuring it fills the gaps completely without compression. If a higher thermal performance is required, install a second layer over the top of the joists, perpendicular to the first layer, ensuring no gaps.
Sealing: Use appropriate tape to seal any joints or gaps where required, especially if creating an 'unventilated' roof space.
Compatibility:
Suitable for use in cold lofts and pitched roofs.
Compatible with standard timber joist spacings (400mm and 600mm) due to its combi-cut design.
Check local building regulations for required insulation levels and installation methods.
Care:
Store rolls in a dry place, preferably flat, away from moisture and direct sunlight.
Avoid prolonged exposure to damp conditions during installation.
The insulation itself is maintenance-free once installed.
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