Does this look like dry rot?

CattyUk

Decided to pull laminate up as there was a gap towards one side of room below skirting board and slight bounce so wanted to check the joists etc. 

Now pulled it up and the wood doesn’t look too bad but think the dip was because wood was uneven. Seems everything in this house has been done complete bodge job. 

So I don’t know if it’s my anxious mind or does this look like dry rot? 

Saw like what could be classed as white cotton wall but also can’t tell if it’s just a spider web? There is loads under there! Could only really see on if this from what could see. 

Also bit of red dust near one section but I don’t know if it’s brick dust or something. 

Can see white powder at end of damp proof membrane is this efflorescence? And should I be worried? 


Any help pls? Majorly panicking, got multiple house projects on at mo, feels never ending so really hoping not signs of dry rot! 

Rosa_Damascena

I thought dry rot was a condition that affects wood? Your problem seems to be eroding concrete.

stuart45

Can't see any rot in the joists, but you should really have at least 150mm clearance from the bottom of the joists to the oversite.

CattyUk

Yeah I know. Discovered this recently with said bathroom. Obviously with that being a bathroom wood is more effected in there and directly touching ground. Think we are going to be installing dpm and insulation and screws/removing wood.

Problem is not enough room for 150mm would make floor too high also half the room is already concrete so would be mismatched height. Is it strictly 150mm? Is this just because the wood more prone to rotting with it touching floor? 

stuart45

Yes, and you get an air flow under the joists.

Jeepers_Creepers

How large is that area Catty? Worth taking the opportunity of making it all 'solid'?

DPM, sand screed levelled to required depth, rigid insulation on top, tamped down and floating 22mm chipboard on top of that. Solid and cosy. 

Sorry, don't know if that's dry rot. I thought dry rot had distinctive tendrils and threads as it spread? 

daveyjp

If it was dry rot the joist would be damp and affected.  This does not appear to be the case.

The first picture does look more like spiders web.

CattyUk

Actually, re last picture, my husband said that wood was clear before. He said he pulled dirt and cobwebs from airbrick so reckons that is what that was. 

Doozergirl

I can't see any dry rot there at all.  

Just looks like building debris and cobwebs. 

Dry rot is wet, for a start.  And that looks dry.  

Norman_Castle

CattyUk said:

The white balls are spiders nests. Dry rot dust is chocolate brown and accompanied by an obvious fungal flower.