140mm Knauf Omnifit 35 - Multipurpose Glass Wool Insulation Slab - 1200mm x 400mm (pack of 4)

Guide Price
140mm Knauf Omnifit 35 - Multipurpose Glass Wool Insulation Slab - 1200mm x 400mm (pack of 4)
Guide Price: £31.03 (£37.24 inc VAT)
Price per m2: £16.16/m2 (£19.39 inc VAT)
- Product Code: A1-5126
- Delivery Time: 2 - 5 working days
- Brand: Knauf (Tech. support: 08000304135)
- Model and Size: 1200mm x 400mm - 1.92m2
Our ratings on 17-09-2025:

4.8 out of 5
Guide Price: £33.50
(£40.20 inc VAT)
140mm Knauf Omnifit 35 - Multipurpose Glass Wool Insulation Slab - 1200mm x 400mm (pack of 4)
Length: 1200mm
Width: 400mm
Thickness: 140mm
Pack Quantity: 4
Board Coverage: 0.48m2
Pack Coverage: 1.92m2
Thermal Conductivity: 0.035W/mK
R-Value: 4m2K/W
Fire Rating (Reaction to Fire): A1(Non-combustible)
140mm Knauf Omnifit 35 Glass Wool Slabs are rigid multipurpose, flexible, non-combustible glass mineral wool slab that is designed for friction fitting installation at 400mm spacings. It has excellent thermal, acoustic, and fire resistance. The sound absorption qualities of Knauf Omnifit slabs are remarkable. Knauf Omnifit slab is used to insulate timber and metal stud partitions, timber frame walls, between rafters, and suspended timber floors, generally a wide range of structures. 400mm width size allows friction fitting between common stud centres without any cutting and waste on-site. This insulation is not dangerous to the environment and has no potential for ozone depletion or global warming.
APPLICATION
- Timber frame and metal stud partitions,
- Between rafters,
- In suspended timber floors
CHARACTERISTICS
- Lightweight and easy to handle and install,
- Friction fits 400mm spacings,
- Eliminates air gaps,
- Non-combustible,
- A1 fire rated,
- Does not sustain vermin and will not encourage the growth of fungi, mould or bacteria.
- Manufactured using Knauf Insulation’s unique bio-based binder, ECOSE Technology,
- Red free - no ingredients in the product that are on the red list - including formaldehyde or phenol.
CERTIFICATION
Manufactured in accordance with
- BS EN 13162, ISO 50001 Energy Management Systems,
- ISO 14001 Environmental Management Systems,
- ISO 9001 Quality Management systems,
- Certified by TÜV Nord.
- ‘Red List Free’ label.
Brand: Knauf
Model and Size: 1200x455mm - 3.28m2
Delivery Time: 3 - 5 days
75mm Knauf DriTherm 32 Ultimate Cavity Slab is a high-performance insulation product specifically designed for use in external full-fill masonry cavity walls. These water-repellent glass mineral wool slabs provide exceptional thermal performance, making them an ideal choice for enhancing energy effi..
Guide Price: £35.81
£42.97 inc VAT
Brand: Knauf
Model and Size: 625mm x 2400mm - 1.5m2
Delivery Time: 2 - 4 days
Knauf Safeboard is an X-ray shielding plasterboard with a barium sulphate core that effectively and significantly reduces the amount of lead needed within X-ray shielding partitions in a wide range of applications within the healthcare sector, and in many cases removing the need for lead altog..
Guide Price: £73.50
£88.20 inc VAT
Brand: Knauf
Model and Size: 2400x1200mm - 2.88m2
Delivery Time: 1 - 5 working days
75mm Knauf PIR Thermal Laminate Insulation Board is a 9.5mm tapered edge wallboard bonded to 65.5mm PIR insulation, offering great thermal and a level of acoustic insulation, perfect solution for insulation and dry-lining in walls and warm roof constructions, in both remodelling and new build p..
Brand: Knauf
Model and Size: 1200x2400 - 2.88m2
Delivery Time: 1 - 2 days
15mm Knauf Wallboard is a high-quality gypsum-based plasterboard commonly used for interior wall and ceiling applications. It consists of a solid gypsum core encased in a durable paper lining on both sides. The plasterboard provides a smooth, flat surface that is easy to decorate with paint, wallpap..
£13.90
£16.68 inc VAT
Brand: Knauf
Model and Size: 2400mm x 1200mm - 2.88m2
Delivery Time: 1 - 2 days
12.5mm Knauf Aquapanel Exterior Cement Board provides a solid, dry base that can withstand the extreme weathering effects of wind, rain, and snow. It makes an ideal substrate for directly applied render finishes and can be used for exterior walls in ventilated systems, exterior ceilings, and soffits..
Guide Price: £74.34
£89.21 inc VAT
Brand: Knauf
Model and Size: 900mm x 1200mm - 1.08m2
Delivery Time: 5 - 7 days
6mm x 900mm x 1200mm Knauf Rooftop Aquapanel Cement Board is an extremely durable construction board highly resistant to moisture, mould and mildew growth. It can be used as a cover board above the insulation and as a substrate to take on the waterproofing layer. Knauf Aquapanel Cement Board Rooftop..
£40.88
£49.06 inc VAT