That's a weird combo for a neighborhood--a bombmaker and someone right next door who just happens to board up their windows for no good reason? Hmmm, actually, I suppose you could subsitute "meth lab" for "bombmaker" in this hypotethical, too, and the boarded up windows would actually make sense.

When I lived in San Francisco, there was a guy who was storing illegal fireworks in his garage. Somehow there was a spark, and the guy was literally blown through the wall of his house and inside the house next door, so depending on the blast you're talking about, yeah, it could certainly still break the boarded up window.