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Are you certain that your old floor was on plane and not just brought level at the point of intersection??Sounds to me like they did not level their joists properly to the height of the "plane" of the new addition and just added the height difference along the joist which would then just mirror any slope that use to exist that was hidden by mud bed and tile.When you lay a 10 foot level down over the new/old section, I assume this is where the floor begins to fall off correct??NWFA calls for 1/4 in 10 feet last that I recall but it has been some time since I have read over the specifications but if you like I will pull them for you. I paid for access to the newest guidelines about 2 years ago and it wouldnt hurt to get my moneys worth.As for addressing it, well first we need to make sure we know what the problem is but I think you already know what is going on and how it will need to be fixed.
Are you certain that your old floor was on plane and not just brought level at the point of intersection??
Sounds to me like they did not level their joists properly to the height of the "plane" of the new addition and just added the height difference along the joist which would then just mirror any slope that use to exist that was hidden by mud bed and tile.
When you lay a 10 foot level down over the new/old section, I assume this is where the floor begins to fall off correct??
NWFA calls for 1/4 in 10 feet last that I recall but it has been some time since I have read over the specifications but if you like I will pull them for you. I paid for access to the newest guidelines about 2 years ago and it wouldnt hurt to get my moneys worth.
As for addressing it, well first we need to make sure we know what the problem is but I think you already know what is going on and how it will need to be fixed.