wasps behind the cedar shingles

I have wood shingle siding. Instead of putting it up normally, the builder has strips of wood (about 1/2 inch) under the butt end of the shingle, so they stick out further than usual. Don't know if this was an attemp to look like (more expensive) shakes or who knows what else. (1953 house)
There are many, many gaps in these wood strips: maybe that is to allow moisture to get out? Best I can tell, there is no wall insulation and no sheething under the shingles. (From identical neighboring houses, I've seen sort of a paper barrier. Maybe those strips are meant to be nailers?
Anyway, the wasps have decided this year that they would go up through the gaps in the strips and hang out under the shingles. Problem is, there is no way to spray up in there. I've sprayed a bunch of times but they're back around the next day.
I was thinking of using a hose connected to a funnel, which I could put over a small charcoal fire (may 3 or 4 briquets). Then push the hose a little way up one of the gaps in the strips. The big question in my mind: is carbon monoxide heavier or lighter than air?
Any other ideas? I've managed to get rid of most of the other wasps around, but this bunch has found themselves a good spot.
Thanks Bill
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wrote:

Just last week a 16 year old boy in BC did a similar thing, use fire/smoke near the eaves to drive out wasps, and burned down the whole house.
But your idea has a precedent. Beekeepers use smoke pots to calm down their bees. The smoke will likely drive them out but won't kill the wasps. One innovation I read about years ago is to use spray net (by women to hold down their hair if there is still such a product) instead of insecticides. It grounds the insects where you can kill them or let the ants do it.
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bill wrote:

Yes CO is lighter than air. However I am not sure your idea will work well.
--
Joseph E. Meehan

26 + 6 = 1 It's Irish Math
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bill wrote:

<SNIP>
My cedar shingle siding is tightly nailed with only some small gaps between the shingles. The wasps manage to get in there anyway. I leave them alone. They're not a threat to anyone (at least the variety we have here) and I understand they do a service in catching small insects. In any event, I don't think I want to impregnate the entire shell of the house with insecticides (your CO idea is a different case).
Jim
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