Joist plate not stuck to mortar

[en_passant]

Hey everyone,

Looking for some advice please. I’m opening up a living room / box room / kitchen to become an open living / dining area.

I also removed 2x corner chimney breasts to square the room off, during which I noticed the floorboards & joists were ridden with woodworm holes so I’m also replacing the floorboards & joists throughout.

Yesterday I placed new joist plates atop the new DPC and mortar on the old sleeper walls but have found today that the wood hasn’t stuck down. It feels nice and strong on the bricks but the joist plates are basically not attached.

I’m not sure what’s caused this on as 2 other plates I’d done the day before seem fine.

What’s the likely cause of it not sticking?

I’ve ran out of sand and cement but have resin to hand from when I installed the steels. I’m thinking I could take the plate up, lay resin atop the mortar and get the plate back down. Is there any reason (other than obvious cost) as to why this wouldn’t be good?

 

[Wayners]

Wall plate? The one held with 1m straps?

 

[cdbe]

It doesn't stick - the mortar bed is just to level up the timber. The weight of the joist and floor will keep it in place.

 

[Wayners]

As above. That's what I wasn't thinking

 

[en_passant]

Thanks guys. I think my issue was I expected it to stick the plate to the bricks. I used the resin to attach it and it did a good job. Such a good job that it lifted the mortar off the top of the dwarf wall.

I drilled through the timber, mortar, DPC & into dwarf walls then attached the wooden floor plates down using concrete screws. I think it was the wood bowing with sufficient force to pull itself away - problem was, the plate was literally just sitting atop, flopping around and not secured at all before I put the resin and concrete screws in.

Have now got the insulation and floorboards down and working well - just need to get the boards stained.