One effective way to prevent smoke escaping through double wall wood stove pipe seams is to seal these seams in order to prevent smoke from escaping through the seams when there is not sufficient heat in the pipe to carry the smoke up and out of the house. Another factor that can create this smoke seepage is a downdraft sometimes created by a high wind.
Sealing Your Stove Pipe
To seal your stove pipe, wait until the stove pipe is cool; then, use a small trowel to apply furnace cement into the stove pipe seams. Carefully apply the cement to the edges of each seam until the cement completely fills all the seams where pipe sections overlap.