How do I Safely Cut Though Main Attic into Addition Attic?
I think it's a code violation, but there may actually be no access in the addition. Access at the eaves would be rather difficult and very tight. A gable vent you have to remove to get in is more common, as miserable no inside access access goes. But I've seen more than one &quot;just sealed up and you have to cut your way in&quot; job over time.
The main risk (so long as you stick to cutting the roof sheathing, not the rafters) will be encountering a wire on the side you can't see. Always better to be able to look at both sides, and start with drilling a few holes so that you are sure how both sides line up before you cut - but wires can be repaired, once the excitement dies down. I guess with modern toys you could drill a hole (relatively low-risk) and put a borescope or small camera through to look for hazards before cutting more.