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 Crepi 'gun'! 
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Joined: 25 Jul 2003, 07:09
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Location: Lot
I bought a compressor not so long ago, and was wondering if these crepi 'guns' were any good. By that I mean the small hand-held hopper attachments that you fill with crepi/cement. I'm not bothered about particular finishes, just want to get the stuff on the wall without half of it ending up on the ground!

Tony

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18 Nov 2011, 15:40
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in a nutshell, no....

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18 Nov 2011, 22:12
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Joined: 17 Mar 2010, 11:45
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Your response would have more value if you were to explain why you consider them to be no good.

I am in the other camp and consider mine one of my best investments and have used it to do several hundred square metres of facades.

The OP first needs to qualify what he refers to as crepi, the textured paint finish either internal or external or the chaux based enduit, for me the correct useage of the name crepi is the first product but many call the second crepi.

In any case the gun can be used for either but you will need strong arms, proper crepi needs diluting slightly with water, you will soon judge the consistency that will fall smoothly through the hopper and exit the nozzle without blocking it, it gives a very good covereage and a fine grain texture, for a heavier skin scraping finish you need to go over it with a crepi roller while wet.

The enduit de renovation flows more smoothly through the gun and goes on even better, however the thickness is nowhere near as thick as enduit projétée, its OK for tyrolean but if you want to get to the minimum 12mm thickness that is recommended then you need to do many passes, if you are any good with a trowel you would be better off sticking with that, the enduit is also denser than the crepi so you need even stronger arm muscles.

Does it all end up on the floor? Well proportionally less than using a trowel and a lot less than enduit projétée but the overspray can travel a long way especially if you are up high, I am blind in my left eye and was working on scaffold from the Lh rear corner of my building, I had forgotten that my car was parked beside the building unseen to me, that was 3 years ago and I am still cleaning off the crepi.

The overspray from enduit doesnt stick and can be swept up and re-used if need be, the crepi overspray sticks like sh*t to a blanket so you need to cover stuff well, if you go for an enduit gratée finition with une taloche craintée then a huge proportion of the product is lost to the floor.

Finally if your gun doesnt have one you must fit an air valve as the guns free flow intended to be used with a big towed compressor, une vanne à sphere does the job nicely and are cheap and easy to find.

hope that helps


19 Nov 2011, 11:00
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Joined: 30 May 2005, 11:21
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in a nutshell - 'yes'

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19 Nov 2011, 14:02
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either a very large nutshell or a very small crepi gun!


19 Nov 2011, 14:09
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Joined: 30 May 2005, 11:21
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As others have said, one can get very good results with such a machine. To add to Chancers' offering, my compressor is just a tad too small to cope with the required air flow - it's a 100 litre machine. I would advise a 150 or 200 litre capacity as a minimum. It takes a bit of trial and error before one gets a finish with which one is satisfied, perhaps arthursmith found it difficult to get beyond that stage!

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19 Nov 2011, 15:13
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For the record I need to use the 'gun' with a sand and lime cement, or one of the Weber lime based enduits (sorry shouldn't have mentioned crepi!)

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19 Nov 2011, 16:41
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I used mine to do a self coloured lime based enduit de renovation on a boundary wall that was about 6 feet high and it was hard going, i did it in bays but it was a struggle getting enough up before it dries too much to gratte the finish, I sprayed it to reterd things, it probably would have been OK in winter.

I did some very long sections of dwarf parpaing wall in my car park and it was ideal although I did scrimp and reduce the thickness.

finally I had a brick chimney in the loft conversion that i wanted to do, had it been a bare room i might have risked the crépinateur but it was pretty much finished so i did it by trowel, I am nul at plastering but the stuff goes on like cream, in hindsight I would have either done the boundary wall with a trowel or used crépi instead of enduit.

I have a 3hp 2 stage compressor with a 50 litre tank and its just up to the job, a larger reservoir would limit the pressure drop before the bac empties, it is a proper 3HP induction motor italian compressor made in the 60's or 70's the modern ones with brush motors, often direct drive do not develop the power that they claim under load, they are rated under stall conditions which would instantly destroy the motor.


19 Nov 2011, 17:36
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Grumpy wrote:
As others have said, one can get very good results with such a machine. To add to Chancers' offering, my compressor is just a tad too small to cope with the required air flow - it's a 100 litre machine. I would advise a 150 or 200 litre capacity as a minimum. It takes a bit of trial and error before one gets a finish with which one is satisfied, perhaps arthursmith found it difficult to get beyond that stage!


i suppose that they're okay for your average diy'er, and if you use crepi with a consistency of paint.

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19 Nov 2011, 17:54
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arthursmith wrote:

i suppose that they're okay for your average diy'er, and if you use crepi with a consistency of paint.


.. or perhaps your standards are somewhat higher than mine? As you suggest, I'm a very average diy-er and managed to get results that satisfied me!

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19 Nov 2011, 22:16
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Grumpy wrote:
arthursmith wrote:

i suppose that they're okay for your average diy'er, and if you use crepi with a consistency of paint.


.. or perhaps your standards are somewhat higher than mine? ...!



probably

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19 Nov 2011, 23:57
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Now look what you have done, just when Arthut had overcome the fear of posting more than a couple of words he is back to just one!


20 Nov 2011, 08:00
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Joined: 01 Oct 2010, 23:15
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I got a crepi gun that is supposed to work with enduit traditional but it blocks with sand instantly. waste of time and money.


20 Nov 2011, 09:04
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