I live on Long Island, in a high ranch style house. The master
bedroom is in the back corner of the house, and about three feet of
the back of the room is cantilevered out over the backyard. In the
winter, this room gets COLD.

I have a hot water system with baseboard radiators (with metal fins
around the pipe). In this room, the baseboard is on that back wall
(that's cantilvered out). The room is 13x16, with that wall being 13
feet. I have about 11 feet of baseboard on that wall from pipe elbow
to pipe elbow. There are no other radiators in that room.

Here's my question. If I remove the baseboard with the metal fins,
and replace it with cast iron baseboard, will that make a big
difference in how warm the room gets? I don't want the room to get
too hot - just warm. Now, it's the coldest room in the house. The
room is 13x16, with an 8' ceiling. I have sheetrock walls and
insulation in the walls from the 1960s. When I paint (not anytime
soon), I intend to rip out the exterior walls and resinsualte and
resheetrock.

In the meantime, wil changing the radiators help? Again, I don't want
to make the room TOO HOT, just warmer than it is now.