Starting Construction On a SIP House

Reader Contribution by Jerry Ward
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My wife and I have owned 10 acres in southeastern Michigan for 10 years and this year we are building a house on this property. I, being a nerd, have been researching advances in building techniques over the years. I have been watching Structural Insulated Panels (SIPs). So we decided to go SIPs from Insulspan which had the added benefit of being a local company so transportation costs would be less. I also knew I wanted to insulate the basement we are using a pre-cast concrete wall system from Great Lakes SuperiorWalls which start out at R12.5 but can go much higher by filling the cavities with insulation when you finish the wall.

We worked with Josh Seiser at Super Build Systems to come up with a plan that maximizes the space and use of panel material. We are going with a story and a half Cape Cod style house. While there are some spaces on the second floor at the eves with a low overhead they are within the insulated envelope of the house so they provide great storage options basically for free. Josh and his crew are also putting up the shell of the house.  (Videos at www.youtube.com/my10acres.)

There are engineering advantages to using a panel, when the skin is part of the structure it is much stronger. There are only splines (think 2×6 studs) at the joints between the panels and around every opening.A normal stud wall has a stud every 16 inches, which is a path for thermal transfer; a SIP structure has many fewer of these.

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