Oh that delicious chocolate bar with the light and airy honeycomb centre…Although I never liked it at all I have a lasting memory of my Grandmother syphoning boxes of the stuff from the working men’s club for me to ‘enjoy’.
Fast forward to today and the airy honeycomb centre is reserved for cast concrete walls and contractors scratching their heads for a solution. I’m writing this blog because recently there has been a spate of Honeycombing problems that have been compounded by carrying out knee jerk reaction repairs. In panic mode swathes of decent concrete surfaces have been lost in refacing walls and columns. Blowholes obliterated, joint and board lines lost and surface flatness and tone compromised! In effect the concrete has been lost to a bag and a half of full cream fairing coats.
However…Honeycombing might look and taste awful but it’s no big deal to fix so in the wise words of the Cadbury’s Caramel Bunny: “take it easy.”
This blog is dedicated to my good friend and concrete colleague Elaine Toogood. She recently inspired me to ‘get off my horse and write my blog.’ This came about through a discussion on sandpaper of all things.
"80 grit? 120 grit or indeed True Grit?" That was the question.
Of course we weren’t discussing the thespian talents of John Wayne or even listening to Glen Campbell... because the usual focus was on Visual Concrete of course. The subject in Elaine's holster was if sandpaper was a good idea to use for cleaning concrete surfaces…
We never got round to having that shoot out before, during or even after Eco Build. So in the spirit of sharing and, as John Wayne once said, “Tomorrow hopes we have learned something from yesterday.” here's what I think:
Ok, so if you want to find your True Grit for dry or wet cleaning concrete then Diamonds are a concrete’s best friend. Flexible Nickel encrusted Diamond hand...
Ok… before anyone accuses me of being reckless and advising to ditch a visual concrete specification, this blog entry is about an interesting outside the box conversation I had with an architect last week.
The project in question is an under construction passive house in Hackney with a fair faced concrete basement structure. Whilst there may be some remedial works to undertake the concrete in general looked rather good. Whilst discussing the process of procurement the architect described the difficulty in sourcing a reasonably priced contractor who could offer the exacting finish they required. This became increasingly frustrating and so the architect rather radically chucked the spec in the bin. The specification was subsequently replaced by a simple ‘do the best job possible please’ instruction which, in all honesty, didn’t give a worse result than a lot of tightly specified works that I see.
Although essentially risky, the architect managed to get more or less what was required thro...