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Got a survey done on a house I put an offer in for.

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Old 01 December 2016, 06:25 PM
  #31  
ditchmyster
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My theory.

Looks to me like water has run down the edges of the new windows and saturated the render, then it's frozen and produced the cracks.
Old 01 December 2016, 07:03 PM
  #32  
tony de wonderful
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Originally Posted by Devildog
Nope - it won't

Buildings insurance will cover fire, flood damage (provided you're not in a high risk flood area) damage from bust pipes, storm damage, certain accidental damage to the fabric of the building and so forth. It won't cover a pre existing defect that you don't know about on purchase.
Can't it also cover subsidence?
Old 01 December 2016, 07:07 PM
  #33  
tony de wonderful
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Originally Posted by Devildog
What would worry me more is the apparent removal of the sills. Although your surveyor should have raised that if it was an issue.

Call the surveyor and chat it through with him.
I did mention on the phone that the sills may have been removed/changed but didn't press the issue. He didn't seem to suggest he thought this was an issue. As he said in his report he told me; cracked render is common in these houses. He seemed pretty sure there was no structural issues, everything straight and level for a period house, nothing seen inside.

I checked out some other terraces in the area and one or two are same with the old sill spaces filled in with bricks, although not rendered. The sill doesn't bear loads as I understand it?
Old 01 December 2016, 07:09 PM
  #34  
hodgy0_2
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Originally Posted by ditchmyster
My theory.

Looks to me like water has run down the edges of the new windows and saturated the render, then it's frozen and produced the cracks.
yeah, that's not a bad shout

I had some building work done last year, and there was some bare render left over, it had a few initial cracks - just cosmetic

but the builders said get some paint on otherwise the water will get in and freeze etc
Old 01 December 2016, 07:42 PM
  #35  
tony de wonderful
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Originally Posted by hodgy0_2
yeah, that's not a bad shout

I had some building work done last year, and there was some bare render left over, it had a few initial cracks - just cosmetic

but the builders said get some paint on otherwise the water will get in and freeze etc
Cement-sand render? I've read this can be an issue on older solid wall houses since it locks water in and is very rigid. But then you can read all sorts on the internet.
Old 01 December 2016, 08:45 PM
  #36  
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Originally Posted by tony de wonderful
Cement-sand render? I've read this can be an issue on older solid wall houses since it locks water in and is very rigid. But then you can read all sorts on the internet.
well it "works" on breaking up road surfaces - i.e. water ingress freezing and re-freezing


so why not sand/cement render
Old 03 December 2016, 05:28 PM
  #37  
gary77
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100% this does happen . dpc(damp proof coarse) .there is usually facing brick below dpc and render above .

If render is put below the dpc to ground level damp rises up behind it ,it freezes and expands and will burst lumps of render off the wall.

It does look like rain water has been running down that side im not sure it would cause the render to crack that way .

Are the walls solid with no cavity ? Is the inside plastered directly onto the wall or is it on strapping with lath and plaster .

Obviously you would only see a crack on the inside if the brickwork is solid and plastered directly onto it.

Again whatever caused it i dont think its anything major to worry about . Hurry up and buy it and pull that render of im curious to see what its like behind

Last edited by gary77; 03 December 2016 at 06:04 PM.
Old 03 December 2016, 10:15 PM
  #38  
tony de wonderful
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Originally Posted by gary77
100% this does happen . dpc(damp proof coarse) .there is usually facing brick below dpc and render above .

If render is put below the dpc to ground level damp rises up behind it ,it freezes and expands and will burst lumps of render off the wall.

It does look like rain water has been running down that side im not sure it would cause the render to crack that way .

Are the walls solid with no cavity ? Is the inside plastered directly onto the wall or is it on strapping with lath and plaster .

Obviously you would only see a crack on the inside if the brickwork is solid and plastered directly onto it.

Again whatever caused it i dont think its anything major to worry about . Hurry up and buy it and pull that render of im curious to see what its like behind
On another forum someone said the water can accumulate around the sills and seep in and then you get the cracking over time due to cold etc. It's apparently possible to modify sills a little to promotes drips but I'm not sure how.

I was looking on google street view at many rendered houses in my area and many have some cracking.

Something cropped up and I discovered this planning regulation though:

https://www.planningportal.co.uk/info/200130/common_projects/18/external_walls/2

Where 25 per cent or more of an external wall is re-rendered, re-clad, re-plastered or re-lined internally or where 25 per cent or more of the external leaf of a wall is rebuilt, the regulations would normally apply and the thermal insulation would normally have to be improved.
So basically if you hack all the render off a wall, you are supposed to fit external thermal cladding on any solid walls. It looks like total **** of course. It might be possible to get the council to let you not do this? I dunno, but if so it looks like a repair would be the way to go instead of hack off and replace, to save the cost and ugliness of the thermal cladding.
Old 04 December 2016, 05:01 AM
  #39  
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Originally Posted by tony de wonderful
On another forum someone said the water can accumulate around the sills and seep in and then you get the cracking over time due to cold etc. It's apparently possible to modify sills a little to promotes drips but I'm not sure how.

I was looking on google street view at many rendered houses in my area and many have some cracking.

Something cropped up and I discovered this planning regulation though:

So basically if you hack all the render off a wall, you are supposed to fit external thermal cladding on any solid walls. It looks like total **** of course. It might be possible to get the council to let you not do this? I dunno, but if so it looks like a repair would be the way to go instead of hack off and replace, to save the cost and ugliness of the thermal cladding.
Hi,
I believe that you put a small groove underneath the bottom edge of the sill to encourage drips to form.
Cheers
Steve
Old 04 December 2016, 07:33 AM
  #40  
ditchmyster
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Originally Posted by tony de wonderful
On another forum someone said the water can accumulate around the sills and seep in and then you get the cracking over time due to cold etc. It's apparently possible to modify sills a little to promotes drips but I'm not sure how.

I was looking on google street view at many rendered houses in my area and many have some cracking.

Something cropped up and I discovered this planning regulation though:

So basically if you hack all the render off a wall, you are supposed to fit external thermal cladding on any solid walls. It looks like total **** of course. It might be possible to get the council to let you not do this? I dunno, but if so it looks like a repair would be the way to go instead of hack off and replace, to save the cost and ugliness of the thermal cladding.
Out here in Croatia they use 5cm x 50cm x 1m Polystyrene then put a fine plastic mesh on top to stop cracks like you do with plaster board gaps, then skim with flexible waterproof tile adhesive, it's the new big thing out here for facades, this can be done inside as well.

They say it really seals the heat in and you won't get any damp or mould, I have used just the mesh and skimmed on a wall I was having damp/mould problems with, I also painted it with mould resistant paint just to be sure.although they said I didn't need to, but for the sake of an extra few quid, I went with the belt and braces approach.
Old 04 December 2016, 08:49 AM
  #41  
hodgy0_2
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Originally Posted by ditchmyster
Out here in Croatia they use 5cm x 50cm x 1m Polystyrene then put a fine plastic mesh on top to stop cracks like you do with plaster board gaps, then skim with flexible waterproof tile adhesive, it's the new big thing out here for facades, this can be done inside as well.

They say it really seals the heat in and you won't get any damp or mould, I have used just the mesh and skimmed on a wall I was having damp/mould problems with, I also painted it with mould resistant paint just to be sure.although they said I didn't need to, but for the sake of an extra few quid, I went with the belt and braces approach.
they (I suspect the local council) have done what you describe to a row of houses in the next village

stuck a load of 8inch deep blocks all over the exterior, cut them to fit around doors/windows - then rendered over the top

worth noting that cavity walls were originally used to prevent damp, not for warmth/insulation
Old 06 December 2016, 11:51 AM
  #42  
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Originally Posted by tony de wonderful
Can't it also cover subsidence?
Not if its a pre existing issue thats been covered up.

"New" subsidence - yes.

You're insuring for events from the date of cover onwards.




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