Cell fracture

how to fix the gap created between the fractures when using cell fracture addon. I need to destroy the wall but i used cell fracture addon to fracture the wall and used rigid body simulations to destroy the wall. But it looks already destroyed since it has cracks before it get hitted by rigid body.
what iam trying to say is after using cell fracture there should be no gaps(cracks) in between the walls.so, it will be like a new wall get destructed by blast or some other objects after getting collided with it. please do a update in cell fracture addon to fix this.