I was surprised when the krend installer sprayed the walls yesterday when rain was forecast.

Two hours after spraying it rained fairly hard for a few hours. Which is a shame because no rain is forecast today and its no colder. 

Render team back on site rubbing down and the back wall is like this in a few places.  

 

 

... Is this just part of the normal drying process and to be expected or is it more serious rain damage and should I be concerned?

 

Thought I'd ask here before I ask the render guy.

 

Edited January 15Jan 15 by Mr Blobby

Hard to tell from a photo, but based on what I seem to see yes, I think I'd be a bit concerned. The 'bald patches' look like... well, bald patches, where the grit has not spread evenly. But maybe I am seeing what's not actually there... Are the 'bald' patches smooth?

2 minutes ago, Redbeard said:

Hard to tell from a photo, but based on what I seem to see yes, I think I'd be a bit concerned. The 'bald patches' look like... well, bald patches, where the grit has not spread evenly. But maybe I am seeing what's not actually there... Are the 'bald' patches smooth?

 

Yes, it looks like it has washed off.  A bit silly rendering in the rain.

We had that. Renders put another skim in the affected areas, not noticeable since.

In my limited experience It was b----y hard to do an 'invisible mend' on patches like that. I hope your patches don't 'show'. My experience was doing it myself. If someone else is doing it for you then they have to try to get the 'invisible mend', and arguably re-do it if they cannot. Again, hopefully the pictures are not 'telling the story', and it's not what I think.

 

EDIT: @Conor must have posted his while I was 'composing'. He got an 'invisible mend' - things can obviously be more positive than I suggested. Good! And good luck.

Edited January 15Jan 15 by Redbeard
Cross-posted with @Conor

5 hours ago, Redbeard said:

Hard to tell from a photo, but based on what I seem to see yes, I think I'd be a bit concerned. The 'bald patches' look like... well, bald patches, where the grit has not spread evenly. But maybe I am seeing what's not actually there... Are the 'bald' patches smooth?

 

yes, smooth

 

I asked the renderer about the bald white patches at lunch time and he said it had not yet set and so they hadn't finished scraping it.  He told me it wasn't water damaged and will be fine.  I was rather skeptical about all this, but, to my amazement I went back to check the same wall a few hours later and all the marks have gone.  In fairness it was about 4 pm and light was fading so I will take another look tomorrow, but it seems like all the smooth white patches have, to my amazement, all dissapeared.

 

I will ask the renderer if he patched it up to fix it. Not that he would tell me of course.

 

Now my concern is that after today's spraying the temps have dropped to zero.  Hopefully todays render doesnt get frost damage 🤞

Edited January 15Jan 15 by Mr Blobby

Did they not sheet it up? When we did ours in an October, much later (as ever) than originally planned, we were watching the weather like hawks, and sheeting up with hessian after every pass.

2 hours ago, Mr Blobby said:

they hadn't finished scraping it

I'm not a renderer but this sounds likely to me, having seen a scraped coat done on a neighbour's extension - they put on a thick layer then next day when it's set but not fully hard they scrape a couple of mm off to leave that flat but grained finish. 

 

I don't think it's been patched this afternoon, it wouldn't have hardened enough to finish.

12 hours ago, Redbeard said:

Did they not sheet it up? When we did ours in an October, much later (as ever) than originally planned, we were watching the weather like hawks, and sheeting up with hessian after every pass.

 

No, no cover.  Rain and frost at night.  Renderer seems unphased while I would have put it off until wamer drier weather.  But that would have been April 🤔 and renderer wants to work.

 

Checked on site this norning and everything looks good, but I wouldn't know bad render from good if it looks the same.  Thick frost on the roof, renderers scraping below 🤞

 

 

 

 

 

11 hours ago, torre said:

I'm not a renderer but this sounds likely to me, having seen a scraped coat done on a neighbour's extension - they put on a thick layer then next day when it's set but not fully hard they scrape a couple of mm off to leave that flat but grained finish. 

 

Ah! That's different to mine. We trowelled on and textured (plastic trowel, flat, 'rolling on the aggregate beads') almost immediately, so the 'visual test for 'patchiness' ' was done as we went along.

 

Edit: So as not to mislead, ours was not K Rend, but another, not dissimilar, product.

Edited January 16Jan 16 by Redbeard
Clarification

 

13 minutes ago, Redbeard said:

 

Ah! That's different to mine. We trowelled on and textured (plastic trowel, flat, 'rolling on the aggregate beads') almost immediately, so the 'visual test for 'patchiness' ' was done as we went along.

 

Edit: So as not to mislead, ours was not K Rend, but another, not dissimilar, product.

 

Spraying krend is fast, one day of spraying covers two walls, then the naxt day scraping and spraying. 

With this weather, my nerves are left in tatters 😬

Just to make you feel better the person fitting our solar battery anf just drilled right through the garage wall and popped off a chunk of our new (and difficult to repair) moncouche render......he dud confess straight away.....