Bulk Room Design Features

The size of the bulk room varies acoording to individual needs, but should be large enough that there is sufficient compost mass to supply heat. 

At a fill depth of 4-5 feet, one ton of compost requires approximately 8-10 sq. ft. of floor space. 

Bulk rooms are well insulated. The walls and door are R-19 the ceiling is R-30 minimum. A vapor barrier should protect all insulation. 

The room has a double floor. The bottom floor is concrete, insulated to R-19 with styrofoam or other water impervious material, and covered with tar or temperature resistant plastic as a vapor barrier. The compost floor is 12-18 inches above the bottom floor, and is made of 4 x 4 s with spacers in between to leave 20% air space. This floor is removable to permit periodic cleaning. 

The interior walls and ceiling are made of exterior grade plywood, treated with a wood preservative or marine epoxy. Allow 4 inch for expansion. Caulk or seal with fiberglass (ape. 

---