Highest living comfort
Solid wood building envelope made of Dowel Laminated Timber(DLT) that effectively eliminates thermal bridges
Maximum energy efficiency
Energy efficient geothermal heating system
Ecological, healthy and sustainable
Construction that emphasizes sustainability and healthy living
Welcome to K-Plus Haus
Dowel wood buildings
made in Germany

We are excited about your visit and would like to introduce ourselves as the exclusive American partner of the German manufacturer Kaufmann GmbH. Kaufmann has designed this innovative solution to achieve extreme energy efficiency known as the K-Plus Haus made at its core of solid doweled wood walls.
The goal of the K-Plus Haus is to reach the highest possible energy efficiency at the most effective price point thus providing the lowest possible energy costs. We have developed synergies with natural materials and trusted components, the central one being the solid doweled wood walls, to create a uniquely comfortable and healthy environment to live in. The K-Plus system eliminates off-gassing and makes it possible for all interior surfaces to have similar temperatures.
The K-Plus heating technology makes you independent of fossil fuels as the energy is obtained through geothermal ground coils and a particularly effective heat pump. The K-Plus Komfort Ventilation System provides each room with fresh air and recovers up to 90% of the heating/cooling energy through an effective cross-flow heat exchanger. The heating and ventilation load can easily be supplied by a photovoltaic system which can also be optimized to include power storage. The total concept of an air tight building envelope that effectively eliminates thermal bridging constructed out of solid doweled wood walls mixed with ultra-efficient technology makes it possible to generate more energy throughout the year than the house consumes for heating.
There are many more details to the K-Plus Haus concept that combine the advantages of proven masonry and log/timber framing construction methods with cutting edge building science. To achieve this solution to the energy consumption problem worldwide, Kaufmann GmbH has pushed the limits of German engineering and quality control utilizing 25 years of building experience.
Florian Dengel – President Alp Built
Your Advantages
Solid wood air-tight building envelope
eliminates thermal bridging
Individual architecture
Guaranteed energy usage
Efficient heat pump
Comfort air ventilation system
with cross-flow energy recovery
Highest comfort of living
All surfaces have
the same comfortable temperature
Health conscious building materials
Fresh filtered air
570 completed projects
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Passivhaus Building Envelope with no Thermal Bridging
K-Plus Houses have a specially developed and very well insulated building envelope, with the use of ecological insulation layers, thermal bridges have been effectively eliminated. It is important to make sure that all insulation is installed evenly.
Sustainable & Healthy Materials
R-Value Solid Doweled Wall: R40
Temperature Phase Shift: 19 Hours Wall / 17 Hours Roof
Triple Glazed Passivhaus Windows: U-Value 0.6
Any Internal Surface Temperature only +/- 4º to Air Temperature
Higher Sound, Fire and Radiation protection from the mass of wood
Advantages & disadvantages of house construction methods
Bauzeit | Statik | Brandschutz | Schallschutz | Strahlenschutz | Wohnklima | Baukosten | Werterhalt | |
---|---|---|---|---|---|---|---|---|
K-Plus Haus | ||||||||
Holzständerhaus | ||||||||
Ziegelhaus |
Advantagese K-Plus Haus
Annual energy requirement
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Efficient and Future Proof Technology
The innovative building technology in the K-Plus Haus increases the feeling of comfort and provides energy efficiency compared to conventional sources of heat like gas, oil, pellet or forced air. The system with geothermal coils(free energy from your yard), energy efficient heat pump and comfort ventilation system with heat recovery is well suited to use with a photovoltaic array. The overall system can produce more energy throughout the year than it consumes for heating.
- K-Plus Haus 10%
- Holzständerhaus 50%
- Ziegelhaus 75%
Savings through K-Plus details
Content coming soon! Dies ausgefeilten Details im K-Plus Haus sparen bis zu ca. 20% Energie.
build your dream house
The Alp Development LLC team is ready to answer any questions you may have. We look forward to hearing from you.
contact persons

Florian Dengel
President Alp Development LLC
Phone 540.935.0380
Mobile 703.447.4778
fdengel@alpbuilt.com


Jack O‘Neill
Western Regional Representative
Phone 540.935.0380
Mobile 703.283.6885
joneill@alpbuilt.com

Timm Bever
Midwestern Region Representative
Phone 540.935.0380
Mobile 540.905.9481
tbever@alpbuilt.com