25mm Unilin Safe-R SR/UF Phenolic Underfloor Insulation Board (pack of 12)
25mm Unilin Safe-R SR/UF Phenolic Underfloor Insulation Board (pack of 12)
- Product Code: A1-6863
- Delivery Time: 2 - 3 working days
- Brand: Unilin (prev. Xtratherm) (Tech. support: 03712221055)
- Model: 2400x1200mm - 34.56m2
Our ratings on 14-09-2026:

4.8 out of 5
25mm Unilin Safe-R SR/UF Phenolic Underfloor Insulation Board (pack of 12)
Length: 2400mm
Width: 1200mm
Thickness: 25mm
Pack Quantity: 12
Board Coverage: 2.88m2
Pack Coverage: 34.56m2
Thermal Conductivity: 0.021W/mK
R-Value: 1.2m2K/W
Compressive Strength: 120kPa
Fire Rating (Reaction to Fire): D(Class 3)
25mm Unilin Safe-R SR/UF Phenolic foam is a superior performance rigid underfloor insulation with enhanced fire performance, consisting of an Euroclass D s1 d0 phenolic foam core with negligible smoke obscuration. Unilin Safe-R SR/UF is faced with low emissivity aluminium facings both sides, and has a thermal conductivity as low as 0.02W/mK.
APPLICATION
- Underfloor
CHARACTERISTICS
- Superior performance phenolic foam,
- Provides the most efficient U-values with minimal thickness,
- Effective thermal and fire performance,
- Low smoke obscuration,
- For new build or refurbishment,
- Rot proof and will remain effective for the life span of the building,
- Can be readily cut using a sharp knife or fine toothed saw
CERTIFICATION

- EN ISO 9001 - Quality Management Systems
- EN ISO 14001 - Environmental Management Systems
- ISO 45001 - Occupational Health & Safety Management System
- BBA approved
Brand: Unilin (prev. Xtratherm)
Model: 2400x1200 - 34.56m2
Delivery Time: 2 - 3 working days
37.5mm Unilin Safe-R SR/TB is a composite insulated panel of of 25mm Unilin Phenolic core with a glass tissue facing, bonded to a 12.5mm tapered edge plasterboard for internal applications. Unilin Safe-R SR/TB composite insulation board is fixed with dot & dab adhesive bonding. It is designed to..
Guide Price: £712.18
£854.62 inc VAT
Brand: Unilin (prev. Xtratherm)
Model: Unilin Xtrafall
Delivery Time: 7 - 10 days
Unilin Xtrafall is a tapered roofing insulation system designed to deliver both thermal performance and bespoke drainage on flat roofs. By combining rigid Polyisocyanurate (PIR) insulation boards with precision‑engineered falls, the system eliminates standing water and the consequent damage often as..
Brand: Unilin (prev. Xtratherm)
Model: 1200mm x 2400mm - 2.88m2
Delivery Time: 1-3 working days
87.5mm Unilin Thin-R Thermal Liner XT/TL-MF is a composite insulated panel of 75mm Unilin PIR core with foil faces bonded to 12.5mm tapered edge plasterboard for mechanically fixing to internal walls. Unilin XT/TL-MF is designed to provide high levels of thermal insulation and dry lining in one oper..
Guide Price: £53.08
£63.70 inc VAT
Brand: Unilin (prev. Xtratherm)
Model: 1200x450mm - 2.16m2
Delivery Time: 2 - 4 days
90mm Unilin ThinR XT/CW Partial Fill Cavity Wall Insulation Board is a PIR insulation board with a high thermal performance whilst maintaining a residual cavity in the external walls. This board achieves high standards of insulation with a certified thermal conductivity of 0.022W/mK with the op..
Guide Price: £45.13
£54.16 inc VAT
Brand: Unilin (prev. Xtratherm)
Model: 2400mm x 1200mm - 2.88m2
Delivery Time: 1-3 working days
110mm Unilin Thin-r XT/TF has a core of polyisocyanurate (PIR) bonded to low emissivity textured aluminium foil facings for use in timber framed walls. Unilin XT/TF board offers excellent insulation performance with excellent thermal conductivity. Unilin XT/TF is CFC & HCFC free and is manu..
Guide Price: £46.17
£55.40 inc VAT
Brand: Unilin (prev. Xtratherm)
Model: 2400mm x 1200mm - 5.76m2
Delivery Time: 7 - 10 days
150mm Unilin Safe-R 019/MA (Floors) is a high‑performance phenolic floor insulation board designed to deliver excellent thermal efficiency with minimal thickness. It is commonly used below screeds, timber floors and concrete slabs where achieving low U‑values is essential without increasing floor bu..









