Development and distribution of lightweight concrete masonry blocks, chimney systems, dry fills and mortars based on natural pumice.
Bisotherm GmbH
Mülheim-Kärlich · Neuwied · Plaidt · UrmitzNew on Amplifa
About Bisotherm
Since 1985, Bisotherm GmbH has developed and distributed lightweight concrete masonry blocks and system products for solid residential and commercial construction. The product range includes thermally insulating exterior wall blocks for monolithic wall constructions, solid interior wall blocks, supplementary and system components, dry fills, mortars, wall temperature conditioning, as well as chimney and exhaust systems. Production is based on mineral aggregates, in particular natural pumice, which is extracted and processed within the group of companies by the Dr. Carl Riffer Baustoffwerke and ROTEC GmbH & Co. KG. The masonry blocks are manufactured in the company's own plant in Mülheim-Kärlich and in supply plants in Plaidt; fills and winter de-icing agents are produced in Neuwied, chimney systems at J. Hillen GmbH in Neuwied. Ceramic flue pipes for the chimney systems are manufactured by the extrusion process. In addition, the company offers training courses for planners, construction companies and installers through the BisoAkademie. Bisotherm GmbH is part of Dr. Carl Riffer Baustoffwerke GmbH & Co. KG, which since 2019 has been the sole shareholder of Bisotherm and ROTEC.
- Site
- Mülheim-Kärlich
- Processes
- Manufacture of lightweight concrete masonry blocks (exterior wall blocks BISOPLAN, BISOMARK,, Manufacture of interior wall masonry blocks (NORMAPLAN Vbl/Hbl, BISOPHON, BisoBims hollow blocks), Extrusion process for ceramic flue pipes (chimney systems BISOAIRSTREAM), Manufacture of dry fills (BISOTHERM dry fill, BISOPHON acoustic fill, BISOLIT, Processing of natural pumice (crushing, sieving, drying, washing) into lightweight aggregates and, Manufacture of mortars (bed joint mortar M10, thin-bed mortar DBM), Manufacture of half-timbered blocks and clay blocks (BISOCLAY), Manufacture of supplementary and system components (U-blocks, lintels, ring beam formwork,
- Materials
- Natural pumice, Lightweight concrete, Lime-bound lightweight concrete, Clay, Pumice gravel (dried, mixed with basalt and slate), Perlite (expanded), Expanded silicate rock of volcanic origin, Ceramics
- Certificates
- Blue Angel (RUTSCH-EX), Notified body 0794 (Factory production control), CE marking / declarations of performance
- Founded
- 1985
- Industries
- Residential construction, Commercial construction, Building materials trade, Winter services, Building renovation and heritage conservation, Building renovation / heritage conservation (half-timbered, historic buildings)
- 01
Extraction of natural pumice from regional pumice deposits
- 02
Processing: washing, crushing, sieving, drying into defined grain sizes
- 03
Production of lightweight aggregates and granulates
- 04
Manufacture of masonry blocks, fills, mortars and system components
- 05
Extrusion of ceramic flue pipes for chimney systems
- 06
Distribution and technical consulting for planners and installers
Raw Materials and Materials
Natural pumice
Volcanic raw material processed into lightweight aggregates for lightweight concrete masonry blocks, fills and winter de-icing agents.
Lightweight concrete
Material of the masonry blocks for exterior and interior walls with combined requirements for thermal, sound and fire protection.
Lime-bound lightweight concrete
Material of the half-timbered infill block for the infilling and renovation of half-timbered structures.
Clay
Component of BISOCLAY clay blocks with pumice aggregate for diffusion-open wall structures in historic buildings.
Pumice gravel
Dried pumice gravel mixed with basalt and slate as the basis of BISOPHON acoustic fill.
Perlite (expanded)
Lightweight aggregate of the BISOLIT perlite fill for thermal insulation of attic and timber-beam ceilings.
Ceramics / fireclay
Extruded ceramic flue pipes or tongue-and-groove fireclay pipes as the core of the BISOAIRSTREAM chimney systems.
Mineral and organic insulating materials
Integrated thermal insulation cores of the Bisomark exterior wall blocks.
Mortar according to EN 998-2 (M10)
Thin-bed mortar and bed joint mortar for laying Bisotherm precision blocks.
Calcium magnesium acetate / potassium formate
De-icing components of the combined winter de-icing agent RUTSCH-EX SUPERGRIP.
Headquarters and Supply Plants
Mülheim-Kärlich (Administration)
DEHeadquarters and administration
Mülheim-Kärlich (Plant 1)
DEProduction of lightweight concrete masonry blocks (Dr. Carl Riffer Baustoffwerke)
- Materials
- Lightweight concrete, natural pumice
Neuwied (Fills, RUTSCH-EX)
DEProduction of dry fills and winter de-icing agents (Dr. Carl Riffer Baustoffwerke)
- Materials
- Pumice gravel, perlite, expanded silicate rock
Neuwied (Chimney systems)
DESupply plant for chimney systems (J. Hillen GmbH)
- Materials
- Ceramics, fireclay
Plaidt
DESupply plant for masonry blocks (Rausch Therm Stein GmbH, Plant 3)
- Materials
- Lightweight concrete, natural pumice
Urmitz
DESupply plant for raw materials: washed pumice, substrates, lightweight aggregates (ROTEC GmbH & Co. KG)
- Materials
- Natural pumice
Products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacture of lightweight concrete masonry blocks (exterior wall blocks BISOPLAN, BISOMARK,Casting | – | – | – | – | Lightweight concrete, Natural pumice, mineral lightweight aggregates |
| Manufacture of interior wall masonry blocks (NORMAPLAN Vbl/Hbl, BISOPHON, BisoBims hollow blocks)Casting | – | – | – | – | Lightweight concrete, Natural pumice |
| Extrusion process for ceramic flue pipes (chimney systems BISOAIRSTREAM)Plastics | – | 1.00 m (pipe length) | – | – | Ceramics, Fireclay |
| Manufacture of dry fills (BISOTHERM dry fill, BISOPHON acoustic fill, BISOLITCasting | – | – | – | – | expanded silicate rock of volcanic origin, pumice gravel, perlite, basalt, slate |
| Processing of natural pumice (crushing, sieving, drying, washing) into lightweight aggregates andCasting | – | – | – | – | Natural pumice |
| Manufacture of mortars (bed joint mortar M10, thin-bed mortar DBM)Casting | – | – | – | – | Mortar according to EN 998-2 |
| Manufacture of half-timbered blocks and clay blocks (BISOCLAY)Casting | – | – | – | – | Clay, pumice aggregate, lime-bound lightweight concrete |
| Manufacture of supplementary and system components (U-blocks, lintels, ring beam formwork,Casting | – | 3.50 m (lintels overall length) | – | – | Lightweight concrete, Natural pumice, mineral/organic insulating materials |
| Manufacture of winter de-icing agents (RUTSCH-EX, RUTSCH-EX SUPERGRIP)Casting | – | – | – | – | Natural pumice, pumice stone granulate, calcium magnesium acetate, potassium formate |
| Manufacture of chimney and exhaust systems (LAS-F, LAS-F PRO with fine particulate separator, HS,Assembly | – | – | – | – | Ceramics, Fireclay |
Additional services
Quality and Certification
Factory production control of the masonry block production is monitored by the notified body Güteschutz und Landesverband Beton- und Bimsindustrie Rheinland-Pfalz e. V. (No. 0794). Declarations of performance, CE markings and EPDs are available for the products; RUTSCH-EX is awarded the Blue Angel eco-label.
| Evidence | Mülheim-Kärlich | Plaidt |
|---|---|---|
| Notified body 0794 (Factory production control) | ||
| CE marking / declarations of performance | ||
| Blue Angel (RUTSCH-EX) |
History
- 1850
Production of masonry blocks from natural pumice in Mülheim-Kärlich dates back to this year.
- 1918
Founding of Dr. Carl Riffer Baustoffwerke.
- 1970
Distribution of the masonry block products under the Bisotherm brand name since the 1970s.
- 1985
Founding of Bisotherm GmbH; development and distribution of lightweight concrete masonry blocks and system products.
- 2010
Processing of natural pumice at the Neuwied site with modern plant technology.
- 2019
Dr. Carl Riffer Baustoffwerke GmbH & Co. KG becomes the sole shareholder of ROTEC GmbH & Co. KG and Bisotherm GmbH.