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B, _& t& g8 ?找回以前的貼子,對我來說也不容易,還是簡單再說一遍好了 Possible causes are:8 f; Y/ G m/ S( v) g6 [
1. sub floor did not hold tight to the floor joists. Screws are doing better than nails for this purpose.: Y3 Z, o5 ?) V0 H
2. supporting beams are a bit too far away from each other.
9 s' N' \& c: V4 U7 v6 A2 n3. supporting beams are not level due to earth settlement.
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For 2, you may need someone with engineering knowledge to find out, but there should be a building code governing the span distance. For 3, you can go down the basement to do a visual check yourself.
1 T! U) O T( c) E( \% ]# s$ W. S! ?But anyway, insist the builder to fix the problem right away, don't let them get away with 6 months time. |
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