Century Old SIP Timber Frame Cottage Grove WI

Location: Cottage Grove, WI

Project Information

Project Type: Residential, > 3,000 sq. ft.
Manufacturer: Energy Panel Structures
Builder: Ultimate Construction, Inc.
Design Professional: Brown House Architects
Year Built: 2021


High Performance: Yes
HERS/EUI Index Score: 40
ACH50 - Blower Test Results: 0.86
CO2 lbs./sq.ft./year:

Building use:
Single Family Residence

How did SIP construction help you get this job?
Our energy rating on previous homes.

The quietness and healthiness benefits of having a SIPS home. Needing to build 10 walls
Neopreen SIPs roof
Being able to combine with over 100+ year old timber frame 
SIP wall thickness: R26
SIP roof thickness: 1O" Neopreen roof panels

Benefits of using SIPs on this project. Did SIPs help save time, labor, construction costs, or energy?
With the size of the home and height of the walls, SIPs saved superior amount of time, plus the angles of the home.
Vaulted area with panels for bedroom and dining room
1 O' basement and walk out walls.

Innovative design elements or structural engineering involved:
Spancrete was used over the covered porch, which is above the garage.

Additional innovative design elements:
Redesigning timber frame being built out of 300+ year old barns (three different barns) that we carefully removed.
These timber frames worked well with the SIPs package, in the vaulted ceiling and dormer areas, letting us have a continuous ceiling.

HERS Index: 40
Blower door test results: .085 ACH50

This house has 2 condensing boilers, which are 95% efficient Radiant in-floor heat
High velocity system
Variable speed/scroll compressors
High efficient AC

Additional energy-saving materials used in the building envelope:
Spray foam on ring joist areas and all top plates. R60 blown in areas that were not SIPs

Additional energy-efficient products or design features:
All lighting is LED.
On demand water heater
Boiler in-floor heat
Energy Star appliances
Make up air for the kitchen exhaust 

Additional sustainable materials or design features:
Real stone on exterior
Standing seam roof

Additional comments:
45 years being in the building business, this home is the most unique home Ultimate Construction has built with SIPs.
High ceilings
Window details
Exterior elevation details 


Affiliated Members

Energy Panel Structures, Inc.
Graettinger, IA


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