Replacing floor joists

[sagesdoor]

I have to replace some of my floor joists which have rotted. Our house is very small, only 12feet wide with one sleeper wall between the out side walls on either side. Due to the size of the rooms there is no way of installing a full joist without cutting it. Am I right in thinking that I can join two pieces together on the sleeper wall with timber connectors and if so how should I best do this. To my way of thinking I could either over cut the pieces and rest the offset piece in a joist hanger or alternatively cut the joist to exact size and then cut in half and sandwich the two pieces between two shorter lengths of timber on the sleeper wall. Any advice would be very welcome.

 

[masona]

As long the joists overlap the sleeper wallplate in the middle and no need to bolt them together, just screw it to the timber wallplate.

I have done a similar problem by taking out the air brick and slide the full length joist via the air vent!

 

[sagesdoor]

thanks masona. There are no air bricks I can access in this room as it's just a galley kitchen and there's only 4 joists in the floor in total. However, I'll make sure there's a good overlap in the middle.

Thanks again

 

[masona]

If there isn't any ventilation under the floor, best to put some air vent in unless the air flow is transfer from another room.

 

[sagesdoor]

I think this room relies on ventilation from further down the house. I was going to put extra vents in. What distance apart should these be?

 

[Deluks]

thanks masona. There are no air bricks I can access in this room as it's just a galley kitchen and there's only 4 joists in the floor in total. However, I'll make sure there's a good overlap in the middle.

Thanks again

Dont go too mad with the overlap, just slightly past the wall plate will suffice.

 

[masona]

I think this room relies on ventilation from further down the house. I was going to put extra vents in. What distance apart should these be?

Doesn't really matter, normally every 8' to 10'