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Post by limousinlady on Aug 7, 2022 18:24:18 GMT 1
We have an old part stone and rendered house. We have re-pointed the exposed stones but need to re-decorate the rendered parts. The finish is 'gravelly' and we bought monocouche gros grain to repair. As an experiment we removed the original render on part of the house, roughly pointed the stone and applied the monocouche gros grain. In no way does it match the existing - no gravelly effect. I prefer the smooth (but rustic) render and we are now considering re-rendering with lime mortar the whole facade. Questions 1) Is the re-rendering smooth likely to adhere - any obvious problems with this? EDIT: putting a layer over the existing with lime mortar mix 2) What product should we have bought to match with the original? 3) What is the difference between crepi and enduite monocouche? Getting a professional in, isn't an option. We had a quote 6 years ago for one wall to remove the render and re-do and it was about 6k. We have 4 facades to do, if so inclined  .  |
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Post by robertarthur on Aug 7, 2022 18:59:56 GMT 1
1/ The traditional approach is one of 3 layers: to begin with a gobetis, then a middle layer and a thin layer for the finish. Each layer using it's own mix: from strong to finally less lime. The French government, and many, many others, published loads of information, this is one of them. More pictures in this introduction for a wall inside a house. In the past they used their own local recipes: sand from a river nearby, also responsible for the colour, lime from a local supplier. 2/ So it will be almost impossible to get the old texture and colour when buying premixed lime mortars. The reason why many of the professionals go for the ready mixed mortars. Seventeen years ago I replastered using a producct made by Weber, called Procalit F, colour ton pierre, a preferred colour here in the Nièvre.  3/ A crépi is in principle only a thin finishing layer. Although sometimes advertised as an easy fix, don't you worry, one product to do everything. 4/ Back in time to one of the earlier forums, a compilation of questions and answers about lime mortar. |
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Post by limousinlady on Aug 7, 2022 19:26:23 GMT 1
Thanks RA for your informative post. I've edited my original post to make it clearer that I'm thinking of putting a coat of lime mortar render over the existing.
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Post by robertarthur on Aug 7, 2022 19:38:31 GMT 1
The brico sheds sell colorants to mix with your mortar. A correct dosing is almost impossible, every mix, amount of water, amount of dry/wet sand, amount of lime, outside temperature, will be slightly different. So avoid these little bottles with colorant. Weber, I'm not a shareholder, there are several other companies, offers a wide range of colors. You could "imitate" a crépi using a rather wet mortar mix. Much easier to get the same look everywhere. This is what they have to say about Les maçonneries anciennes. |
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Post by Deleted on Aug 7, 2022 19:58:52 GMT 1
If the render is still in good condition if you find someone who can use a compressor you can spray the building with a cheap sand and lime mix it sprays on and gives a nice even coating which lasts for years. You can hire the equipment for under 200 for the weekend and the material costs will only be around 300/400 for a building your size.
commas and dots are extra
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Post by limousinlady on Aug 7, 2022 20:27:51 GMT 1
If the render is still in good condition if you find someone who can use a compressor you can spray the building with a cheap sand and lime mix it sprays on and gives a nice even coating which lasts for years. You can hire the equipment for under 200 for the weekend and the material costs will only be around 300/400 for a building your size. commas and dots are extra The render is blown or missing in places, therefore the reason we are trying to re-do it. The worst is the gable end and the part of the back wall that we have just done. Reading the links from RA and on Leroy Merlin, I think to get similar to the existing finish (gravelly) it has to be projectile by a machine, so we won't be able to patch by hand. Is that right? |
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Post by lurcher on Aug 7, 2022 20:30:08 GMT 1
Nothing helpful to add but I like your house.
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Post by cernunnos on Aug 7, 2022 21:09:12 GMT 1
Your house looks really good , unless you want to redo it before selling , I would spend the money somewhere else ?
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Post by robertarthur on Aug 7, 2022 22:10:11 GMT 1
Even with the help of such a compressor aided technique there is still some finishing to do. There are also very professional heavy duty machines doing a better job. Not cheap. Looking at the picture of your house I must say: I've seen worse...  Where eagles dare: I did it the manual way, a rather long ladder, going up every time with only one full bucket of mortar, so a time consuming but satisfying step by step job. Not too expensive. |
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Post by pcpa on Aug 7, 2022 23:12:34 GMT 1
I have one of these which is great for textured crepi paint, I did 3 facades of my hôtel with it powered by a proper 3hp compressor, it will do small areas of enduit de renovation but it is very slow and hard to get the required 20mm thickness, its OK for patch repairs and for enduit tyrolean.
For proper enduit with a coarse textured finish or for the gobetis coat I have one of these:
They use raccord pompiers so really need a trailer mounted site compressor, I used an 8hp petrol engined site compressor that you wheeled around like a wheelbarrow it ran constantly and the frame tubing was the reservoir, it was up to the job but I wasn't, you really need one person mixing and filling a wheelbarrow with mix while the other person scoops out from another wheelbarrow and puts it up, unless you have Popeye spraying then you have to change places regularly.
I did both roles alone which is madness.
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Post by limousinlady on Aug 8, 2022 7:05:18 GMT 1
Your house looks really good , unless you want to redo it before selling , I would spend the money somewhere else ? Thank you. I didn't have a photo to hand of the side and back elevations of the tall part of the house, which are in a worse state. The front was to show the type of render. |
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Post by limousinlady on Aug 8, 2022 7:10:32 GMT 1
Even with the help of such a compressor aided technique there is still some finishing to do. There are also very professional heavy duty machines doing a better job. Not cheap. Looking at the picture of your house I must say: I've seen worse... Where eagles dare: I did it the manual way, a rather long ladder, going up every time with only one full bucket of mortar, so a time consuming but satisfying step by step job. Not too expensive. Thank you for the link. Picture of your house is inspiring. |
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Post by limousinlady on Aug 8, 2022 7:16:53 GMT 1
I have one of these which is great for textured crepi paint, I did 3 facades of my hôtel with it powered by a proper 3hp compressor, it will do small areas of enduit de renovation but it is very slow and hard to get the required 20mm thickness, its OK for patch repairs and for enduit tyrolean.
For proper enduit with a coarse textured finish or for the gobetis coat I have one of these:
They use raccord pompiers so really need a trailer mounted site compressor, I used an 8hp petrol engined site compressor that you wheeled around like a wheelbarrow it ran constantly and the frame tubing was the reservoir, it was up to the job but I wasn't, you really need one person mixing and filling a wheelbarrow with mix while the other person scoops out from another wheelbarrow and puts it up, unless you have Popeye spraying then you have to change places regularly.
I did both roles alone which is madness.
As you say a big/hard job. I really wanted to patch where possible on the gable end. At the moment we have virginia creeper trying to hide it. lol. |
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Post by robertarthur on Aug 8, 2022 8:38:16 GMT 1
@ Limousinlady, not my house, in the main street of Vezelay up to the basilica, seven, eight years ago. The OH looking back: keep on walking Robert! Not for the first time my answer was: No, interesting construction details, making a photo. Our house is in much better shape, kitchen window last autumn, enduit Procalit F:   |
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Post by robertarthur on Aug 8, 2022 15:38:51 GMT 1
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