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Uneven Suspended Floor


Luke_A

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hi there,

Could someone please advise how to level up a floor where joists are slightly lower on one end of the room(around 5 joists)?

We have a new engineered floor that we want to lay buy the it will look terrible when the floor is uneven.

Can I pack every floor boards where is fixed to joist or is it better to fix a sister joist to the side and raise the level that way?

 

#Luke

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Is this a ground or first floor ..? Can you get interrupted to where the joists are set into the walls to see why they have dropped ..?? Lifting and packing joists with slate is possible with an acro but you need to find out first why they have dropped as it could be for a number of reasons. 

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How much is it off the level?  Are you fairly sure that the difference in levels is just due to the age of the house rather than some on going "structural issue"

 

Also, how does the daylight come into the room. If you have say a window in a bedroom and you run the flooring parallel to the window cill this can show up more the changes in level, but if you run the new flooring perpendicular to the window cill it can be a bit more forgiving. Lastly,  do you think that once you put all the furniture back it will still be a thing that will annoy you?

 

 

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Hi guys,

It might be age the house is victorian and the difference in level is on the first floor, level difference is on 7 joist with the worst case scenario in the middle being 14mm.

Looking at how they are positioned the middle(where the drop is the most visible) one seems to be twisted a little bit this may cause the drop.

Is sliding in plastic packers under the floor boards a good option?

 

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1 hour ago, Luke_A said:

Hi guys,

It might be age the house is victorian and the difference in level is on the first floor, level difference is on 7 joist with the worst case scenario in the middle being 14mm.

Looking at how they are positioned the middle(where the drop is the most visible) one seems to be twisted a little bit this may cause the drop.

Is sliding in plastic packers under the floor boards a good option?

 

Are you saying the issue is the joists are sagging mid span?  Or they are not level at the ends?  Or both?

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On 31/10/2020 at 12:14, Luke_A said:

Is sliding in plastic packers under the floor boards a good option?

nope, well unless you want the new floor to move and squeek! you would need to pack the full length of board, unrealistic, as above lift the old flooring and find the reason.

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