Full speed ahead for climate protection
BAU 2025: maxit Group presents CO2-optimised product range for floors, walls, façades and ceilings
Pumpable infra-lightweight concrete, straw insulation boards, wood-hybrid ceilings and much more: In January, the maxit Group presented a total of 19 new, CO2-optimised product solutions at BAU 2025 in Munich - summarised in the new “maxit zeroCO2 construction kit”. This was presented in detail to interested trade visitors and contains numerous environmentally friendly solutions for floor, wall, façade and ceiling applications. Positive for the climate: depending on the initial situation, the high-performance maxit building products now require 11 to 70 per cent less carbon dioxide in production or use.
Experience has shown that construction professionals can find a broad, differentiated product range with many environmentally friendly solutions for floor, wall, façade and ceiling applications at the nationwide maxit Group. Word of this has even reached the Office of the Federal President: the Upper Franconian family business received an invitation from the Federal President and the German Federal Environmental Foundation (DBU) to the “Week of the Environment” in June 2024, where it was one of the few selected building materials manufacturers to present its new straw insulation boards in particular. However, this was only an intermediate step: ‘It was more important for us to be able to present the full range of our new environmentally friendly solutions in time for the BAU 2025 trade fair in Munich,’ explains Johannes Eberlein, Head of Product Management at the maxit Group. To achieve this goal, the company has implemented a series of internal measures, consisting of
1. the substitution of cements,
2. reducing the mass, i.e. the weight or layer thickness of individual products and
3. the use of ecological, natural materials.
The entire maxit product range for new builds and refurbishments was rigorously tested for its CO2-saving potential and the results were then reviewed by an independent engineering firm. This ultimately led to the development of 19 ecologically optimised solutions: These were incorporated directly into maxit's new ‘zeroCO2 construction kit’, from which experts and building owners can select precisely the right building products in terms of building physics for sustainable projects. Depending on the initial situation, the maxit innovations contained in the kit now manage with 11 to 70 per cent less CO2 in production or use.
Environmental footprint consistently improved
The new solutions include, for example, the steel-free wood-concrete composite ceiling ‘maxit DUOBLOCK’ (DIBt approval, Z-9.1-904). It enables ceilings over 11 metres wide for all common building types and has a convincing ecological footprint with around 64 percent less CO2 emissions compared to conventional, non-hybrid constructions. The pumpable, heat-insulating infra-lightweight concrete ‘maxit ecoflow ILB’, which was presented for the first time at the trade fair in Munich, is also environmentally friendly. Originally developed as an aesthetically sophisticated solution for the factory prefabrication of thermally insulating sandwich elements, ‘maxit ecoflow ILB’ can now also be used to customise monolithic special and utility buildings. As a particularly lightweight and environmentally friendly concrete, it owes its mechanical stability and pumpability to the so-called Ecosphere technology, which centres on microscopically small hollow glass spheres (MHGK) that are added to the existing binder system as a lightweight filler. This award-winning technology not only increases the air content in the new infra-lightweight concrete, but also ensures reduced shrinkage and cracking behaviour as well as an easier production process. After use, the non-combustible, purely mineral building material is also fully recyclable.
The popular system insulating render ‘maxit ip 55 therm’ has now also been optimised using Ecosphere technology: in addition to the porous loose rock perlite, micro hollow glass spheres are now added to the purely mineral insulating render as a second insulating lightweight aggregate. In this way, the high-yield ‘maxit ip 55 therm’, which is available in silos, achieves a thermal conductivity of 0.055 W/(m∙K). The improved thermal conductivity results in lower plaster thicknesses compared to conventional mineral insulating plasters - with the same insulating performance.
Impact sound insulation board made of straw, mortar pad made of clay
Another maxit innovation is the ‘strohpanel plan’ impact sound insulation board, which was designed as an environmentally friendly alternative to conventional floor insulation made from oil-based EPS boards. Thanks to their format of 50 x 100 centimetres and thicknesses of either 10, 22 or 30 millimetres, the straw fibre boards can be used flexibly and achieve the thermal conductivity group WLG 060. Used as a laying solution in combination with the calcium sulphate flowing screed ‘maxit plan 490’, this results in thicknesses of 30 millimetres for the impact sound insulation and 50 millimetres for the screed - a structure which, according to the test report, offers an effective impact sound reduction of DLw = 18 decibels.
![[Translate to Englisch:] maxit Messestand 2025](/fileadmin/_processed_/1/7/csm_24-10_Messestand_450250da62.jpg "[Translate to Englisch:] Mit Vollgas unterwegs in Sachen Klimaschutz")
BAU 2025: The maxit Group presented consistently CO2-reduced products for floor, wall, façade and ceiling applications at the leading trade fair in Munich in January.
The same product family as the ‘Strohpanel plan’ also includes the new ‘maxit strohpanel’ for the interior insulation of buildings, which was presented in detail at the trade fair. The flexible straw fibre boards can be applied to both wooden stud constructions and solid walls. They are then plastered so that they are always used in a closed plaster system. From an ecological and structural point of view, the straw fibre insulation boards are impressive due to their resource-saving production, high thermal insulation and healthy living effect.
Another new product is the “'Mörtelpad clay”', which was specially developed for the requirements of ecological clay buildings. The water-activated dry boards made of thin-bed clay mortar and integrated glass fibre mesh are used for the clean and fast processing of vertically perforated clay bricks. The resulting naturally bonded masonry is characterised by a high level of healthy living and particularly safe processing. The new “ Mörtelpad clay” thus expands maxit's mortar pad series, which has been successful for years, and also offers the same time and processing advantages in practice as its predecessors, which specialise in classic masonry.
Biochar as CO2 storage
More climate protection in construction has also recently been promoted by maxit building products equipped with biochar as a CO2 storage medium. The lime-cement plaster ‘maxit ip 18 ML C’, designed for thermally insulating masonry, was launched in mid-2024. Thanks to the innovative bio-aggregate, it stores around 150 kilograms of CO2 in the long term. At the same time, it remains as easy to work with as a conventional lime-cement render. At the trade fair, the maxit Group presented further environmentally optimised building products of the future with biochar as an additive, such as the high-performance adhesive and reinforcing mortar ‘maxit multi 300 C’. This is fibre-reinforced, non-combustible and has a high adhesive strength. maxit expects to receive its building authority approval later in the year after the trade fair. The ‘maxit multi 300 C’ can then be used as a thick-layer, mineral adhesive and reinforcing mortar as well as a finishing coat for ETIC systems made of polystyrene or mineral wool. Its climate-optimised composition using biochar makes it the first of its kind on the German market.
The environmentally friendly maxit products are also complemented by new clay and lime plasters. "With so many climate-optimised solutions, it's not always easy to keep track of everything. That's why we have decided on our new ‘zeroCO2 construction kit’. Experts and building owners can select the exact products they need for their sustainable projects - including all the information they need to obtain national and international building certificates," explains Johannes Eberlein.
![[Translate to Englisch:] Arbeiter auf Leiter zieht maxit multi 300 C auf Wand auf](/fileadmin/_processed_/8/f/csm_24-10_maxit_multi_300_C_4dc4705c8b.jpg "[Translate to Englisch:] maxit multi 300 C")