For best results choose a full length stair when adding it between 2 floors.
How to make a second floor in a room.
Open web editor and draw the room or floor plan that will contain stairs.
Check the temperature of the second floor rooms.
If they still are warmer then the downstairs rooms close the downstairs vents more.
Floor joists should be spaced no more than 16 inches 41 cm apart from center to center to provide adequate stability.
Divide the house into two zones one for each floor.
Make the second floor return vent duct bigger.
To make a second floor with homestyler please.
Adjust the height of your walls and make them higher go to building roof and select one of our ceiling.
Repeat until you are satisfied with the temperature of the rooms.
Switch to windows etc mode and search for stairs.
For 1 the furnace fan running all day with the a c on might solve some milder heat trap problems for your second floor.
You can hover over a stair in the library to see it s dimensions.
You might also want to try adding a ceiling fan in critical rooms like a second floor bedroom.
Mark the position of each floor joist along the sill plate.
Use a tape measure to measure 16 inches 41 cm in from the edge of the rim joist and draw a small notch.
Add a small return vent duct to each room on the second floor.