Alumix BLH-F 8mm Floor and Flat Roof Reflective Insulation
8mm foam-backed reflective thermal and acoustic insulation for floors, slabs and flat roofs. 26 dB impact noise reduction, 88% reflectivity, complete floor system R 1.35. Rolls 1.20 m x 30 m (36 m²).
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Description
Alumix BLH-F 8mm reflective thermal and acoustic floor insulation
Foam-backed multilayer reflective insulation for floors, slabs and flat roofs. 26 dB impact noise reduction, 88% radiant heat reflection, complete floor system R 1.35.
Alumix BLH-F 8mm is a multilayer reflective thermal and acoustic insulation for floors, concrete slabs and flat roofs. An HD air-bubble layer, a central pure aluminium sheet and an HD black polyethylene foam backing combine to cut heat loss and impact noise in only 8 mm. It is a vapour and air barrier in one layer, compression-resistant under screed, and covers 36 m² per roll.
What is Alumix BLH-F 8mm?
Alumix BLH-F (product code AL-BLH-F) is a foam-backed, triple-layer reflective insulation. Its construction is HD air-bubble layer + pure low-emissivity aluminium foil + HD black polyethylene foam. The outer face is HD black polyethylene foam on one side with reflective foil on the reverse.
It is designed to sit between two compression layers under a screed or final floor finish, reducing both heat transfer and impact noise between floors.
Key benefits
- 26 dB impact noise reduction. Airborne noise level Lw in situ 69.4 dB(A).
- Reflects 88% of radiant heat. Low emissivity aluminium core of 0.12.
- High insulation in only 8 mm. Complete floor system R 1.35 m²K/W.
- Vapour and air barrier in one layer. To EN 12086.
- Compression-resistant. 11.3 kPa at 10% compression.
- Triple-layer reflective construction. Bubble, foil and foam.
- Non-fibrous. No dust or loose fibres.
- Light at 280 gsm. Easy to cut and install.
Technical specifications
| Product type | Multilayer reflective thermal and acoustic insulation |
|---|---|
| Product code | AL-BLH-F |
| Construction | HD air-bubble layer + pure low-emissivity aluminium foil + HD black polyethylene foam |
| Outer face | HD black polyethylene foam one face, reflective foil reverse |
| Thickness | 8 mm |
| Roll size | 1.20 m x 30 m, 36 m² per roll (10 / 20 / 30 m available) |
| Weight | 280 gsm |
| Reflectivity | 88% |
| Emissivity | 0.12 |
| Total thermal resistance | R 1.32 m²K/W |
| Compression rate at 10% | 11.3 kPa |
| Impact noise reduction ΔLw | 26 dB |
| Airborne noise level Lw in situ | 69.4 dB(A) |
| Fire performance | Euro-class F (EN 13501-1:2002) |
| Vapour / air | Vapour and air barrier (EN 12086) |
Acoustic values are for a typical floor with concrete slab and Alumix BLH-F assembly (insulation rating 3).
R-value: complete floor system
BLH-F is specified as a complete floor system. Generic reflective-cavity figures do not apply.
| Configuration | R-value (m²K/W) |
|---|---|
| Complete floor system, as installed | R 1.35 |
| Product Rt total, manufacturer stated | R 1.32 |
| Core R, tested (product alone, no cavity) | R 0.21 |
Core R tested to ISO 8301 / ASTM C 518 (heat-flow-meter). System R applies to the floor assembly described below. A minimum 8 mm foam is recommended where acoustic dampening is the priority.
Applications
- Floors
- Concrete slabs
- Flat roofs
- Screed systems
- Residential buildings
- Commercial buildings
- New build and renovation projects
How to install BLH-F on floors and slabs
- Measure the floor area and prepare the roll quantity needed to meet the m².
- Clean the slab and lay the first compression layer over it.
- Unroll BLH-F over the full area, leaving no gaps between sheets.
- Seal every joint and overlap with polypropylene adhesive tape.
- Add the second compression layer, then pour the screed or lay the final finish.
Assembly order (top to bottom): screed / final finish, compression layer, Alumix BLH-F, compression layer, slab.
Testing and certification
Alumix BLH-F is tested to EN 13501-1:2002, EN 12086, ASTM C 1371, ISO 10140 / EN 717-2, EN 826:1996, DIT 478R/13 and ISO 8301 / ASTM C 518. Test reports and certificates are available on request.
Frequently asked questions
What is Alumix BLH-F used for?
It is a thermal and acoustic insulation for floors, concrete slabs, screed systems and flat roofs in residential and commercial buildings.
How much does BLH-F reduce impact noise?
It gives an impact noise reduction of 26 dB (ΔLw), with an airborne noise level of 69.4 dB(A) in situ for a typical floor assembly.
What is the R-value of BLH-F 8mm?
The complete floor system as installed achieves R 1.35 m²K/W. The manufacturer-stated product Rt is 1.32 m²K/W, and the tested core R is 0.21 m²K/W.
Can screed be poured over BLH-F?
Yes. It is compression-resistant at 11.3 kPa (10% compression) and is installed between two compression layers before the screed is poured.
Is BLH-F a vapour barrier?
Yes. It acts as a vapour and air barrier in one layer, to EN 12086.
What roll sizes are available?
The standard roll is 1.20 m x 30 m (36 m²), with 10 m and 20 m lengths also available.
Get a quote for Alumix BLH-F 8mm
Alumix Insulation Global manufactures reflective foil insulation, radiant barriers and vapour barriers for residential, commercial and industrial projects. Contact our team for pricing, bulk orders, technical data or test certificates, or email info@alumixinsulationglobal.com.
Values shown are subject to verification against current test reports. Thermal and acoustic performance may vary with installation method and site conditions. Specifications subject to change without prior notice.
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