Stone Cottages, Slow Heat and Balancing
Solid stone holds temperature for a long time but takes a while to get there, which is why systems in older Roberttown properties often run for extended periods to bring the house up. When one radiator is taking more than its share of the flow, the rooms at the end of the run never quite catch up, and the usual complaint is a cold bedroom while the hallway is roasting.
That is a balancing problem rather than a boiler problem, and it is fixable in an afternoon. It is worth ruling out before anyone suggests a bigger boiler — a system that is not distributing heat evenly will not distribute it any better with more of it.