• 253-858-7472

Lammers Residence

Crofton, NE

Participant information
Extreme Panel Technologies
Josh Fragodt
475 East 4th St North
Cottonwood, MN  56229
Phone: 507-423-5530
Email: josh@extremepanel.com
Website: www.extremepanel.com

Single Family Homes under 3,000 sq. ft.

Project information
Lammers Residence
Crofton, NE 68730

Date Completed:
December 2019

Total sq. ft. of conditioned space:
2,700 sq. ft..

Built By (if different than applicant)
Joslin Construction Contact
Ron Joslin
89153 Hwy 81
Fordyce, NE 68736
Phone:  402-357-2637

Panels Manufactured By: Company Name (members only):
Extreme Panel Technologies


Designed By (if different than applicant - SIPA will only recognize members)
Lammers Engineering LLC
Austin Lammers
475 East 4th St North
Crofton, NE  68730
Phone: 402-522-6181

Describe the end use of the building:
The Lammers Home is a single family dwelling on our farm.

How did SIP construction help you get this job?
SIP construction was critical for this home design. When my wife and I decided that we were interested in constructing a home with a curved roof, the first phone call I made was to Extreme Panel Technologies to inquire about curved panels and how they could possibly meet our design requirements. Overall strength and efficiency were largely considered for this project. SIP construction exceeds the strength of traditional framing from my engineering prospective. SIP construction also meets the high efficiency requirements needed for our extreme Nebraska hot/cold conditions.

SIP wall thickness and core material:
6.5" wall thickness

SIP roof thickness and core material:
12.25" roof thickness

Describe the benefits of using SIPs on this project. Did SIPs help save time, labor, construction costs, or energy?
SIP construction does offer many advantages during construction on a traditional home. Those advantages shined particularly on this project. Framing a curved roof and achieving the modern design we wanted would have been far more difficult using any traditional construction method. SIPS can be pre-fabricated with such accuracy that it made integrating other portions of the structural design easier. Using 3D structural drawings, I was able to ensure that Extreme Panel could construct my panels to spec and in turn verify that other portions of the design would integrate seamlessly.

Describe any innovative design elements or structural engineering involved:
The main support structure for the great room of this house is constructed from rolled steel beams. These beams were formed across the strong axis by Chicago rolled metal products, and free span 34' across the main room. These beams were fabricated by Lammers Engineering, and as a result of the close tolerances maintained by Extreme Panel and Lammers Engineering, the structure fell into place perfectly.

Describe the HVAC system used on the project:
The HVAC system for this project is currently used for cooling only. The structure is completely outfitted with radiant floor heat that circulates hot water from an exterior boiler that burns pelleted wood. This same boiler also heats a 5400ft^2 shop. For approximately $1600 per year, both structures are kept at a comfortable temperature. Additionally, the house also employs accessory ductwork for an ERV air exchange system that directly exhausts air from damp air locations

Describe any other energy-saving materials used in the building envelope other than SIPs. List U-values of windows used and the U or R-value of any insulation materials. (judged only for High Performance Category)
The home is specifically designed to reject heat in the summer and capture it in the winter.  Anderson windows that face sun all year round have a "smart sun" film in place to help block out the summer heat. As the sun lowers in the southern sky near the winter solstice, it is able to drop under the south facing overhangs of the building. South facing windows are either traditional Low-E glass or clear dual pane glass which allows heat to be absorbed. 

Please list any energy-efficient products or design features, such as lighting, hot water heating, appliances, passive solar (judged only for High Performance Category:
The home is completely outfitted with high efficiency LED lighting inside and out. An HTP combination LP gas boiler heats the domestic hot water for the home and in the winter time it is aided by the outdoor wood pellet boiler. The HTP unit also serves as a backup space heating supply should the outdoor pellet stove go into a failure mode. During the summer time the HTP combination unit is solely responsible for water heating. The HTP unit has a 199,000 BTU capacity.

Were any solar panels installed on the project? If so, indicate the size of the system (judged only for High Performance Category):
We have not solar panels on our farm at this time, however as solar panels become a less cost prohibitive option we will look into them in the future.

Click on a photo to enlarge.

Builder Information

Joslin Construction Contact
Ron Joslin89153 Hwy 81
Fordyce, NE 68736

Phone: 402-357-2637

Panels manufactured by Extreme Panel Technologies.

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