if i can fix this once and for all for $10-20, that's fucking great.

so, what i'll need to do is move everything away from all of the walls, clean everything around them and do it all at once.

like i say: i don't care if it makes the problem worse, structurally. i just want the smell to go away. if he wants to actually maintain his property one day, he can do that at his own prerogative; as it is, he doesn't seem to want to do anything except get high and watch tv, so i'll have to do it for him.

if it's more than $50, i'll send him the bill. otherwise, it's not worth it.

https://www.homehardware.ca/en/568g-polyurethane-low-expanding-foam-sealant/p/2030867