Originally Posted by 191185
Hello, I have 3 bedrooms on the same floor, two of them are side by side next to each other....
How do I know if it's safe to knock down the wall and make one big bedroom?
Is there a roof over this level or another floor?
If it is the roof, then do as budro stated and stick your head into the attic access. Look at the areas where the truss webs meet at the bottom cord, then look for load bearing tags located at a press plate section. If you do see a tag, then you cannot without using a post and beam support. If you do not, then consult with an engineer or a building inspector who is familiar with your type of house and have him/her inspect the trusses. You may still need a building permit, depending on the regulations in your area. But like budro had also stated, your trusses may "sag" due to settling over the years. Built up asphalt or cement tile roofing will magnify the sagging.
If it is another floor, then you will have to place a post and beam system, as that the floor joists were calculated for the spans given at the time the house was built.