LIGHT BATTS
For thermal insulation of private houses and apartments, it is used in pitched roofs, attics, frame walls, in wall structures with siding finishing, partitions, and joist ceilings.
ROCKWOOL LIGHT BATTS® with Flexi technology are lightweight, water-repellent thermal insulation boards made from basalt-based stone wool.
The key feature of these boards is their unique Flexi Technology—one edge of the board is flexible, allowing for easy installation in structures built on a wood or metal frame. This edge is located on the long side of the board (1000 mm), and the width of the edge itself is 50 mm. The flexible edge is marked on the end of the board.
Product benefits:
- Flexi technology – springy edge
- Tight fit of the slabs – no cold bridges
- Simplified installation of slabs
- Durability
- Fire safety
- Eco-friendliness
Description
LIGHT BATTS® boards are intended for use as a non-load-bearing thermal insulation layer in lightweight roof structures, attic spaces, partitions, interfloor ceilings, walls of low-rise buildings, including vertical and inclined walls in attics, as well as the first (internal) layer in curtain-sided façade systems with an air gap in two-layer insulation applications.
The slabs should not be subjected to significant loads.
ROCKWOOL LIGHT BATTS® with Flexi technology fits tightly to the structure without gaps. This maintains a comfortable temperature in the room and prevents drafts.
Scope of application
LIGHT BATTS thermal insulation boards with Flexi technology are used in virtually all types of structures:
- Walls (frame and siding)
- Pitched roofs and attics
- Partitions and ceilings
- Balconies, baths and saunas
| Density | 30-40 kg/ m3 |
|---|---|
| Thermal conductivity | λ 10 = 0.036 W/(m K) λ 25 = 0.037 W/(m K) λ A = 0.039 W/(m K) λ B = 0.041 W/(m K) |
| Flammability group | NG. Fire hazard class – KM0 |
| Compressibility, no more than | 30 % |
| Vapor permeability, not less than | μ = 0.3 mg/(m h Pa) |
| Tensile strength parallel to the face surfaces, not less than | 6.0 kPa |
Rockwool Light Batts® stone wool slabs
LIGHT BATTS insulation boards with Flexi technology are supplied in informative packaging that explains the material’s distinctive features and applications.
The packaging is made of durable film and completely covers the product on all sides, reliably protecting the slabs from atmospheric influences during transportation and storage.

face

reverse side
LIGHT BATTS® boards are intended for use as a non-load-bearing thermal insulation layer in lightweight roof structures, attic spaces, partitions, interfloor ceilings, walls of low-rise buildings, including vertical and inclined walls in attics, as well as the first (internal) layer in curtain-sided façade systems with an air gap in two-layer insulation applications.
The slabs should not be subjected to significant loads.
ROCKWOOL LIGHT BATTS® with Flexi technology fits tightly to the structure without gaps. This maintains a comfortable temperature in the room and prevents drafts.
Scope of application
LIGHT BATTS thermal insulation boards with Flexi technology are used in virtually all types of structures:
- Walls (frame and siding)
- Pitched roofs and attics
- Partitions and ceilings
- Balconies, baths and saunas
| Density | 30-40 kg/ m3 |
|---|---|
| Thermal conductivity | λ 10 = 0.036 W/(m K) λ 25 = 0.037 W/(m K) λ A = 0.039 W/(m K) λ B = 0.041 W/(m K) |
| Flammability group | NG. Fire hazard class – KM0 |
| Compressibility, no more than | 30 % |
| Vapor permeability, not less than | μ = 0.3 mg/(m h Pa) |
| Tensile strength parallel to the face surfaces, not less than | 6.0 kPa |
Rockwool Light Batts® stone wool slabs
LIGHT BATTS insulation boards with Flexi technology are supplied in informative packaging that explains the material’s distinctive features and applications.
The packaging is made of durable film and completely covers the product on all sides, reliably protecting the slabs from atmospheric influences during transportation and storage.

face

reverse side

























