How are the holes in the wall made and repaired for injected foam applications?
Typically, 1″ holes are drilled at intervals in each bay. The type of drill depends on the material that is being drilled. The spacing depends on the cavity thickness, bay width, product chemistry, and obstructions; usually holes are spaced every two to four feet vertically. After the foam is injected and it begins to cure, any foam or cork extending beyond the wall plane is trimmed flush. The holes can be puttied and painted or covered over with new clapboards or other siding, depending on the project requirements. An infrared thermographic scan is done during the injection process while the foam is hot to verify that the bays are full and no bays have been missed. If any voids are located, they are drilled and filled as the injection process progresses.
