ROCKWOOL HP PARTIAL FILL CAVITY SLAB 80MM X 455 X 1200 (4.37M2)
The ROCKWOOL High Performance Partial Fill Cavity Slab, a semi-rigid insulation solution created for masonry cavity wall construction, is a durable cavity wall insulation solution made of renewable stone wool fibres. It withstands typical conditions, maximises thermal performance and provides a fire-resistant insulation. It has been specially designed to absorb any irregularities on the inner leaf and eliminate ‘stand off’. These features in turn maximise the product’s thermal performance effectively whilst also withstanding on-site rigours to ensure the longevity of -the external wall construction. The fire resistant, mineral wool insulation product creates slabs which increase energy efficiency by knitting together when tightly butt jointed to eliminate potential heat loss caused by any gaps. As a high quality and long lasting product which features a strong outer surface, the High Performance Partial Fill Cavity Slab offers a stable product that will last for the lifetime of the building.
Accreditations:
Euroclass A1 non-combustible / BBA Certificate 93/2884 for use in tall buildings up to 25 metres in height.
* Effective from 3 December 2025 * Free delivery on order over €400, applies to Small & Light, Large & Heavy items within zone 1 only.
Zone Indicator:
To help you understand delivery availability, every item displays a zone icon, icons appear on the top-right corner of each product image:
Types of goods
Available zones
Descriptions
Small & light items
All Zone area
Items under 20kg weight & under 2m long, (some fragile items may not be included e.g. glass/mirrors)
Large and bulky items Extra Large items
Zone 1 & 2 only
Wet & hazardous bagged, items over 20Kg weight & oversized; Euronics white goods, TVs of all sizes.
Large Paint items (6L / 6L+)
Zone 1 only
Large hazardous items (6L+) - available for collection
Available zones
Indicator
Descriptions
All zone area
This icon with all zone area in green, indicates this items can be shipped to all Zone.
Zone 1 & 2 only
Zone 1 & 2 in green and zone 3 greyed out, indicates this product can only be shipped to Zone 1 and 2
Zone 1 only
Zone 1 in green zone 2 and zone 3 are greyed out, indicates this product can only be shipped to Zone 1 only.
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.