Party wall and rendering neighbours wall

[omoeko]

Hi All.


I am having an extension done at the back of the house, I do have a party wall agreement with my neighbour which he happily signed, as can be seen in the picture his walls are blown off and I did promise to render it for him whilst I am doing my works since once my wall goes up, he would have no access to render etc.

I read on some places that its better not to have any space between the walls, but I actually prefer to have a 50mm space or whatever is the smallest space I can get away with.

My question is this, what should be done to this wall, how should it be rendered, mixture and any additives etc. I want the quality of the job to be very high knowing that access to that wall would not be possible again. Mainly concerned about water damage and making the wall waterproof etc.

I would also like to invite neighbour to look at the rendered wall before the bricks start to go up.

Thanks in advance.

 

[zolco]

You would be better off not leaving any gaps between the two structures and join the roofs if possible. He has no overhang at all, not sure what sort of overhang you would end up with, that's just personal views, your architect should advise on it really on his design even if it's done under permitted development

 

[omoeko]

Hi.

Thanks for the reply. my roof is going to be a flat roof. My concern is that in future if he needs to do any works, then our foundations are joined together. You can can the-same about the fact that we have a party wall being a semi, I am just wary of making a decision that could come back to bite me. Also wary of decisions that would raise questions when it comes to selling the house.

Any reason why you say that I am better off ?

You would be better off not leaving any gaps between the two structures and join the roofs if possible. He has no overhang at all, not sure what sort of overhang you would end up with, that's just personal views, your architect should advise on it really on his design even if it's done under permitted development

 

[Vincey]

I'd build it right up , what is half way up the wall on the left? Is it a stop tap handle or a light switch?

 

[omoeko]

its a hook for a flower hanging basket. all that has now been removed that is the red brick you see which laps onto the neighbours wall.

I'd build it right up , what is half way up the wall on the left? Is it a stop tap handle or a light switch?

 

[Deleted member 23452]

I think you may have to leave a larger gap than you intend, or no gap and remove the wall to pour the footing. The party wall agreement is secondary to structural integrity, and if you build the wall 50 mm from the party wall it will be sitting right on the outer edge of the footing which will transfer all the loading to that side. The centre of the wall (so middle of the cavity) should be in the centre of the footing, so presuming you're having a standard 600 wide footing you'll have the standard minimum of 150 mm (six inches) of concrete either side of it. So if you pour the concrete bang on to the boundary you'll have to have 150 mm between the walls.

Anything less than that and building control may knock it if they see it, and if they don't you can end up with cracking and subsidence issues later on.

 

[jet]

Always left a gap
Should the neighbour need re roof he would struggle with no or small gap
Render your neighbours & your new external extension wall builder will , wall facing work overhand & no problem finishing your flat roof trims