This house was built in 2014. I have had tremendous loud muffler noise. I have researched sound proofing and found that the low frequencies cause wood and sheetrock to vibrate increasing the noise. So I have slapped the exterior walls on the inside, not hard, and eight foot or more the sheetrock can be felt vibrating, I went to a house that is being built and slapped the walls and there is just a slight feeling. One person thought the wall itself is moving, Does anyone have any other ideas? Or should I pull the sheetrock off and look at the studs? Thank you.

I'm trying to put tongue and groove on a ceiling in our dining room. The joists that go all the way across are 20 inches apart. I'm not sure whats going on with this, but I believe it has something to do with the roof, as there are many angles in this area of the home. I'm not 100% certain of the diagonal studs, but I did cut away some sheet rock and confirm it is that way on one side. Can anything be done here without ripping off the drywall? NOTE: on the left side, the red line is heavier due to an available stud for anchoring .. there is no stud present on the right side for anchoring. Please excuse the drawing, it isn't exactly to scale, but at least you can see my situation.