Sub Flooring

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  #1  
Old 01-03-03, 10:58 AM
sbasilic
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Sub Flooring

I am looking for ideas and or help. The problem is my first floor subflooring seems to have a great deal of bounce. You can feel the vibration when somone walks around to the extent that you can make items on table (like picture frames) fall over easily. It almost seems as if the subfloor in not nailed or screwed down. I have looked at the subfloor from the basement and see no glue that you would expect to see when the home was constructed (1984). I am thinking the only way to be certain is to tear up the carpeting to see. I have owned the home for less than 1 year and have never had the carpet up. The floor joist are 2x8's 16"oc. Has anyone every experience this?
 
  #2  
Old 01-03-03, 02:37 PM
Doug Aleshire's Avatar
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sbasilic,

Before we discuss what the subfloor is doing, I'd like to know more specifics before answering this as it could be a number of things;

Is the bounce on all of main floor? second?
Does the floor squeak, make noises?
Any hardwood floors in home?
What is the span of the 2x8's - Bearing point to bearing point? i.e.
concrete block wall to beam, wall to wall, etc.
Do you have a wood beam or steel? What size?
How far are the post supports for the beam?
Do you have solid blocking or cross bracing between them?
Is this a 1 or 2 story?
What is the finish flooring on main floor?
Where do you live?

Let me know
 
  #3  
Old 01-05-03, 07:09 AM
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I would really inspect the problem more prior to tearing up the carpet. Our 1957 Cape had a 1 room extension put one as a porch. We turned it into a family room and there was a bounce that was near/under my heavy entertainment center. Scared the crap out of me. I went into the basement area and found the floor 2x10s pulling away from the header approx 1/2" as they were only toe-nailed in. I jacked up the floor to level from underneath, put in hangers, and then insulated the basement ceiling. It is solid now and more comfortable. Check for the beams first. Peace: e3 - spamman
 
  #4  
Old 01-06-03, 10:00 AM
sbasilic
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sub flooring

Thank you for your response. Here are the answers to your questions.

1. The bounce it through most of the main floor. It is particularly bad in the great room.
2. No noise is noticable.
3.Yes, in the kitchen. It is 3/8" hardwood on Luann underlayment.
4. The span of the 2x8's are 12-14'. Beam to poured wall.
5. Steel beam not sure of the size I will follow up with an answer to that item.
6. About 12' also will follow up w/ exact info.
7. cross bracing. I have added some additional cross bracing.
8. Single story
9. Mostly carpet, some ceramic.
10. I live outside of Detroit, Michigan

Thanks

Sam
 
  #5  
Old 01-06-03, 12:35 PM
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Sam,

Where do you live, send me an e-mail and maybe I should take a look. You can't live tht far from me, I'm in Royal Oak!
 
  #6  
Old 01-06-03, 12:48 PM
sbasilic
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I sent you an email with my contact info.
 
 

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