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Materials and Design Service




Permanent Wood Foundation Pictures
Click on title to see pictures.
All foundations must be design.

Permanent Wood Foundation
Pictures of common construction details.
1. Lumber and plywood treated to .60 and stamp with a (FDN) foundation grade stamp.  
2. Wood poles treated to foundation grade lumber requirements.  
3. 9 ft basement with the wood basement floor system and a wood garage foundation.  
4. It easy to dig a hole for a wood foundation.  
5. Step 1. stake out the size of the basement and add 1 ft. for the over dig. (each side)  
6. Dig hole 1 ft. over dig and down to proper depth.  
7. Note the deeper dig around the outer perimeter use as the graver footing system.  
8. The porch area can be completely excavated out.  
9. Corner view of a 12" over dig hole in a clay soil site.  
10. Dig out for point loads for wood gravel pads or concrete pads.  
11. Ready for graver to be dump in the hole.  
12. Dump stone in all corners.  
13. Have the back hole move the stone.  
14. Stone fill to walls of over dig.  
15. If soil is less than 1500 lb. per sq. ft. Have soil tested.  
16. Clean out any fill that drop in trench, before adding gravel.  
17. Use 4" of graver under floor area, 6" deep at wet sites, like  wet sand sites.  
18. All lumber and plywood required to be treated must be stamp foundation grade.  
19. Install all load pads under footing plate in the gravel fill.  
20. Level graver under wall location with leveling board made as site.  
21. Install footing plate and layout in a clock wise direction.  Dip all lumber cuts.  
22. Start at a corner and work in a clock wise direction.  
23. Any studs that are cut can be installed with the cut side up, you do not have to dip cuts.  
24. Plywood goes past the end of wall, and cover the end of the next wall stud.  
25. The next framed wall panel is installed in place.  
26. Windows are easy to frame but will required more support than upstairs framing.  
27. Caulk all plywood to plywood seams, do not caulk other joints in framing.  
28. Blocking at the plywood seams may be required by design.  
29. Day light walk out walls are required to be treated lumber and plywood (see design).  
30. Blocking in some walls are use for shear walls support.  
31. Some wall designs require plywood on two side of wall. (shear wall design)  
32. All basements require a sump crock, can be made of treated materials. (no bottom)  
33. Plywood support pad installed under all point loads that over load the footing plate.  
34. Wider footing plate use to support brick knee wall installed after wall poly.  
35. All ways pour concrete floor up on wall studs as required by design. (1" min.)  
36. Wood basement floors are warm and dry,  they are easy to install and go in fast.  

 

Note: Panel foundations can be site built or made in a shop. When made so it cover up items that need inspection by the Building Inspector. Third Party Inspection may be required. (inspect for grade stamps, treatment stamps, stud spacing, insulation, nailing, dip of saw cuts, plywood requirments are some of the item that a third party inspection will note.

All Panel Wood Foundations must be designed and installed in accordance with:
All current Building Codes Standards

While wood foundations are easy to build, this is only true if one is building from an accurate well designed plan. When such a plan is incorrect, or if something is left out of the plan or absent, or if a design is made using a guide manual (these are not design manuals); major mistakes can be made during the construction process. These errors cause problems for the owner, builder, and the building department.


Woodbasement.com a service of Permanent Wood Foundation System (PWF), supported by Southern Pine lumber users affiliated with the training and installation of wood foundations.
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