Cracks in conservatory.

YoungBlueEyes

I noticed the other day that there’s a crack developed round the conservatory near the floor. The cracks don’t appear on the outside. I’ve been looking round the internet and it seems that desperate heat we had is the cause of everything but I’m not sure it would take this long to show..? When we had the last cold spell I was in there daily scraping the ice from the inside of the windows so I would have noticed it. 

Can anyone help please? 

Here’s a couple of pics. It goes round about dozen bricks length and steps up and down. 

stuart45

It could be due to the way that foundations for conservatories are often done. Instead of building both skins off the foundation, they only build the outer skin off it, lay the slab to it, and build the inner skin off the slab. If the slab drops a bit, the inner skin goes down with ot.

YoungBlueEyes

Ok so if the slab has dropped will it continue to drop or sit still now? Would a new layer of mortar just crack again ‘til the slab’s finished dropping? 

stuart45

It's hard to say if it's stopped. You might have to give it a bit longer. The edges of a slab are more likely to go as the fill is deeper here because of the foundation trench. You could still point it up to help stop the brickwork above dropping.

YoungBlueEyes

Here’s the outside. Bit worried about it’s foundations now. 

This is with the nearest plank removed and looking straight down the wall. 

stuart45

Is there any movement in the outer skin?

YoungBlueEyes

Nope just inside. First pic in my last post is the outside of the wall - mucky but crack free

stuart45

Possibly not the foundations then, even though foundations are often not deep for conservatories.

YoungBlueEyes

This is the same corner from outside. 

The decking is only sat close up to the wall, not attached. 

SpudGunPaul

Your deck is starting to rot too. 

YoungBlueEyes

Yeah decking is coming up in the Spring, it’s a mess. 

Right, off to buy stuff to get it pointed up with, then poss get the internal floor up when we get back. Poss more pics and questions to follow!

Thank you for the help 🙂