The Knauf OmniFit Slab 35 is a non-combustible glass mineral wool insulation slab in a 50mm thickness, supplied as 1200 x 600mm slabs covering 8.64m² per pack.
It is designed for thermal and acoustic insulation across multiple applications, including timber and light steel frame walls, internal walls and partitions, internal floors, ground floors and pitched roofs at rafter level.
The slabs are manufactured to friction fit between common stud centres, helping to reduce air movement around the edges while limiting cutting and on-site waste.
Key Features
Multi-purpose insulation for walls, floors and pitched roof applications.
Friction-fit slab format helps minimise gaps and heat loss.
Non-combustible Euroclass A1 reaction to fire classification.
ECOSE® Technology plant-based binder.
Thermal conductivity of 0.035 W/mK.
Technical Information
Product type: Glass mineral wool insulation slab
Range: OmniFit Slab 35
Material number: 474329
GTIN: 5012061913200
Thickness: 50mm
Slab dimensions: 1200 x 600mm
Pieces per pack: 12
Coverage per pack: 8.64m²
Declared thermal resistance: 1.40m²K/W
Declared thermal conductivity: 0.035 W/mK
Reaction to fire: Euroclass A1
Reaction to fire standard: EN 13501-1
BBA Agrément certificate: 24/7110
Declaration of Performance: G4207LPCPR
Applications: Ground floors, internal floors, pitched roofs at rafter level, internal walls and partitions, light steel frame walls and timber frame walls
We offer reliable delivery services throughout the Republic of Ireland, with straightforward delivery charges for both trade and DIY customers. Delivery options are confirmed at checkout based on your order and delivery Eircode.
Delivery Charges & Delivery Times
Delivery Type
Delivery Area
Delivery Charge
Delivery Time
Small Items
Republic of Ireland
€9.99
3–4 working days
Large & Heavy*
Standard delivery area
€29.99
5–7 working days
Extra Large*
Standard delivery area
€50.00
5–7 working days
Paint 5L or less**
Standard delivery area
€19.99
5–7 working days
Swipe sideways to compare delivery options.
Small Items
Delivery area
Republic of Ireland
Charge
€9.99
Delivery time
3–4 working days
Large & Heavy*
Delivery area
Standard delivery area
Charge
€29.99
Delivery time
5–7 working days
Extra Large*
Delivery area
Standard delivery area
Charge
€50.00
Delivery time
5–7 working days
Paint 5L or less**
Delivery area
Standard delivery area
Charge
€19.99
Delivery time
5–7 working days
*Standard delivery policy. Promotional delivery rates may apply during campaigns.
Additional Information
FREE delivery on eligible Small Items and Large & Heavy orders over €1,499, within the standard delivery area only.
Special Order and Catalogue Products require an additional 5 working days.
FREE collection of old appliances is available through WEEE Ireland when purchasing qualifying large appliances.
FREE Click & Collect is available for items in stock at your selected branch.
Large & Heavy and Extra Large items are available within our standard delivery area only.
Paint delivery Paint in tin cans 5L or less is available for delivery. Larger sizes and paint supplied in plastic buckets are available for Click & Collect only.
TJ O'Mahony offers a 30-day returns policy on eligible unused products, giving you additional time beyond the statutory 14-day cooling-off period applicable to most online consumer purchases.
Eligible products can be returned for a refund or exchange within 30 days of delivery or collection, provided they are unused, in their original and re-saleable condition, complete with all supplied parts and accessories, and accompanied by proof of purchase.
Please note: Return restrictions apply to certain products, including Mixed Paint, certain Bagged Building Products, Solid Fuel, Special Order, Non-Stock and Catalogued Products.
Your statutory rights in relation to faulty, damaged, incorrectly supplied or non-conforming goods are not affected.
