we have a long horizontal crack in rendering,(see pic) been there a while. Neighbouring houses have similar and have been told pointless doing much other than filling as always reappear few years later? Had a couple of plasterers out, who said rendering is sound, but then gave differing advice - one said would rake out about a foot, bond then fill; another said would tape over (tape suitable for exterior with flexibility - newish product?) then skim over. Any advice welcome.
Crack in rendering
- Thread starter Rdow
- Start date
Jgreenplastering
Private Member
If it keeps coming back you need to hack off the render and find out what's causing it, fix that and then you can re render.
There's movement from something, looks to high to be a wall plate or joists.
How olds the house?
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There's movement from something, looks to high to be a wall plate or joists.
How olds the house?
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Jgreenplastering
Private Member
Then the render isn't the problem.
If your not willing to fix it properly you can't expect any repairs to last.
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user__removed
Private Member
Monitor the crack, you can get tell tale monitors cheap enough and simple to use.
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If there isn't any movement and the render is sound you could consider re-rendering with a mesh reinforced thin coat system.
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If there isn't any movement and the render is sound you could consider re-rendering with a mesh reinforced thin coat system.
user__removed
Private Member
I should of stated there is no need to hack off the existing if its sound, you can go over the top with the right materials.
i guess that it is the mortar course of block work at has cracked. when the properties were built the blockwork was left at that point unto the roof trusses were fitted, after a while the gable end block work was completed, the mortar dried to quickly became a weak point therefore that is why the whole estate has the crack in the same position.
if it was my problem i would cut out the crack to about half of the thickness of the block work, 2 inches. with an angle grinder , fill the crack with fischer resin, you will need to purchase a resin gun for this work.
then decorate the complete wall with BEDEC flexi masonry paint, not cheap at £34 a pot, but it will answer your problem, it has worked for me in the past.
if it was my problem i would cut out the crack to about half of the thickness of the block work, 2 inches. with an angle grinder , fill the crack with fischer resin, you will need to purchase a resin gun for this work.
then decorate the complete wall with BEDEC flexi masonry paint, not cheap at £34 a pot, but it will answer your problem, it has worked for me in the past.
Rigsby
TPF Special Forces
This is structural and no matter how many times you patch it will keep coming back.
You need a structural surveyor to find out what the problem is and what is required to cure it. Then make good the render.
Plasterers and renderers are not structural engineers they are too thick for that job. get someone with letters after their name.
You need a structural surveyor to find out what the problem is and what is required to cure it. Then make good the render.
Plasterers and renderers are not structural engineers they are too thick for that job. get someone with letters after their name.
Jgreenplastering
Private Member
Plasterers and renderers are not structural engineers they are too thick for that job. get someone with letters after their name.[/QUOTE]
I usually find c**t after mine does that count?
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I usually find c**t after mine does that count?
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it is not structural, rigsby, the weight of the roof is sitting on the wall plates which are at the front and the back of the property.
roof spread could crack a gable end but if the gable is plumb then that has not occurred.
Rigsby
TPF Special Forces
The op states this has happened to other properties in the street. This sounds like a fault in the design that is affecting the structure.
A structural surveyor or a structural engineer can find the fault in the design. Then find an answer.
No matter how many times this patch is repaired it will keep mirroring through. The remedy will not be that expensive. The surveyor will cost a bit though but money well spent imo.
A structural surveyor or a structural engineer can find the fault in the design. Then find an answer.
No matter how many times this patch is repaired it will keep mirroring through. The remedy will not be that expensive. The surveyor will cost a bit though but money well spent imo.
It's thermolite blocks with render. I had our original surveyor come out and he looked inside, in the room the other side and the attic, then had a close look at the crack. His view was that it wasn't structural, that raking out, bonding and filling would be fine. There is no damp and no cracks inside the house at all.