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John from Va writes

Termidor in crawl space with block wall

I had a major termite company treat my house years ago with Termidor. The way they treated it was inside the crawl space they drilled holes in the center of each lower cinder block, then went around and injected the chemical in each block. No trenching was done anywhere. I wish to redo an application myself for prevention as it has been many years now. Is this a proper way to treat the perimeter, and if I redo this myself want kind of volume would I want to put in each block ?


We would highly suggest trenching and treating instead of only treating inside the cinder block wall.  Termidor is meant to bond to soil and be applied into the ground.  It will not last very long just treating into the cinder block walls.  Cinder blocks are also very porous, so they will soak up a lot of the termidor and you might get a few months of protection instead of 10 years when applying it into the ground.  You should follow the instructions as outlined in our How To Do A Termite Treatment article to treat the exterior and underside of your crawl space. 

Answer last updated on: 04/27/2012

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