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Replacing first floor joists


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The joist span across the whole width of the house (17' or 5.18m) with an intermediate block wall 9'' from the party wall and 8' from the gable end wall in our semi.detached property. They are pocketed into the blockwork and grouted so I guess must have done this as they were raising the house. (1970 build)

Over the years, plumbers have gone overboard with notching in the 8' section from the intermediate wall to the gable wall.

As we are wanting to now convert our garage, which is in-built into the property and is the 9' wide section into a room, I was for peace of mind wanting to replace the joists with new.

I have read in the Buidling Regs that nowadays, casting into the wall is not encouraged as it is bad for sound transmission.

In that sense, we can install hangers by grinding out the mortar and the new joist dont enter the wall at all. The joists are 400mm centres.

Is this something we have to formally notify the neighbour? I have spoken to him, we have an excellent relationship and he always comes to me when he is carrying out various projects in his house.

My builder has done many types of these projects before and it is for this reason I selected him.

 

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If you are only talking of an 8' section of these jousts having a lot of notches I am surprised you think there is a a problem.  sistering new sections of joist onto the worst sections would be a lot easier.

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33 minutes ago, ProDave said:

If you are only talking of an 8' section of these jousts having a lot of notches I am surprised you think there is a a problem.  sistering new sections of joist onto the worst sections would be a lot easier.

+1. Don’t make unacessary work for yourself.

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20 minutes ago, saveasteading said:

+2.

It proably does not even need to reach the wall. 

No, as long as it stops bounce it need not reach the walls.

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