Notes
- 8" ICF walls including reinforcement with R-25 minimum insulating value average $15-20.00 per square foot of wall. Price will vary with number of corners, height and window and door openings.
- Foundations can be conventional spread footings typical of masonry or poured in place walls.
You can also use a post beam style foundation with the wall acting as the beam. Budget cost would be approximately $25-30.00 per lineal foot.
Mat slabs frequently can save money by using the mass of the slab as the foundation for the walls thus eliminating trenching, some forming and multiple pours. A typical mat slab 15-18" thick with a double mat of reinforcing, visqueen and sand would run $20-30.00 per square foot.
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