For a warm, energy-efficient home built to modern standards, the Knauf Earthwool Loft Roll 44 200mm Combi (6.84m²) (Product Code: 12715820) is a dependable trade and DIY favourite at TJ O’Mahony. Designed for insulating cold loft spaces, this high-performance mineral wool roll delivers excellent thermal results while remaining easy to handle and install.
Manufactured using Knauf’s innovative ECOSE® Technology, this insulation is soft to touch, low in dust, and odourless – making it more pleasant to work with on site. The 200mm Combi roll is designed to be laid over existing insulation to help you reach the required depth for current Building Regulations, reducing heat loss through the roof and helping cut energy bills all year round.
Ideal for both new builds and retrofit projects, it offers a practical, cost-effective solution whether you're topping up existing loft insulation or starting from scratch.
Key Features:
High Thermal Performance: Excellent thermal conductivity to help achieve required U-values in loft applications.
200mm Combi Roll: Perfect for topping up existing insulation to recommended levels.
Generous Coverage: Covers 6.84m² per roll for efficient installation.
Soft & Easy to Install: Flexible mineral wool that friction-fits between joists with minimal cutting.
ECOSE® Technology: Low dust, low odour, and made using a bio-based binder.
Non-Combustible: Euroclass A1 fire rating for added peace of mind.
Technical Specifications:
Product Code: 12715820
Thickness: 200mm
Coverage per Roll: 6.84m²
Material: Mineral Wool
Thermal Conductivity: 0.044 W/mK
Reaction to Fire: A1 (Non-Combustible)
TJ’s Tip:
For best results, lay the insulation between and then across the joists to minimise thermal bridging and achieve the correct overall depth. Always ensure good ventilation is maintained at the eaves. Wearing gloves, long sleeves, and a dust mask will make installation more comfortable on the job.
* Effective from 3 December 2025 * Free delivery on order over €400, applies to Small & Light, Large & Heavy items within zone 1 only.
Zone Indicator:
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Items under 20kg weight & under 2m long, (some fragile items may not be included e.g. glass/mirrors)
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Wet & hazardous bagged, items over 20Kg weight & oversized; Euronics white goods, TVs of all sizes.
Large Paint items (6L / 6L+)
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Large hazardous items (6L+) - available for collection
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Old Appliance Collection:
When you buy a large appliance, we’ll collect your old one for free through WEEE Ireland. Please ensure it is uninstalled, disconnected, and ready for pickup. Collection is like-for-like and takes place at the front door or apartment entrance. Restrictions may apply based on access and item type.
At TJ O'Mahony we will exchange or refund any Retail unused product returned to us in its original condition within 30 days of receiving it (*)You can return any unused product to us in its original condition for a full refund or exchange within 30 days of delivery.
This right to return does not apply to products that are non stock and only available to order such as catalogued doors, catalogued bathroomware and mixed paints which are made especially for your order.
Please note that we are unable to accept returns on certain bagged building products and materials, including (but not limited to) hard wall, cement, bonding, slates, and ridges. We appreciate your understanding and recommend checking product requirements carefully before purchase.