mortier de rejointement - colour match

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limousinlady
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mortier de rejointement - colour match

Post by limousinlady »

We are going to make our first attempt at re-pointing the old stone walls of the house. There is an awful lot of surface area, but some quite deep holes that need filling. Our first thought was to buy the ready mix bags that cover 5 sq metres but as it is fairly expensive considering the area we want to cover, we thought about making our own mix. The colour of the ready mix is ton pierre and we would like to colour match that and depending on our skills perhaps to convert to mixing our own for everywhere. Question: what colour & grade of sand do we need to achieve ton pierre?

Trip to Leroy envisaged tomorrow.

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Re: mortier de rejointement - colour match

Post by mysty »

It's a fraction of the price making it yourself.
It's just a mixture of sand and lime.
Baby step instructions.
Buy a couple of black plastic builders buckets.
Use the bucket to measure how much lime you are using if you do not keep the mix the same quantity the colour can vary but not by much.
So you could use three buckets of sand to one bucket of lime.
Sand wise if you want it very smooth 02, more rustic 04.
You can buy that in sacks or cheaper loose delivered.
If it's being delivered plastic sheet under the sand to stop the weeds growing through it.
Gloves on when mixing or pointing and watch for sand in the gloves it cuts your hands.
Mix the lime in an open space as it's not respiratory friendly.
Try a small mix first you want it nice and sticky, do not forget to wet the wall first.
If its burning hot in the sun give it a miss.
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Re: mortier de rejointement - colour match

Post by limousinlady »

mysty wrote:
Sun May 17, 2020 11:53 am
It's a fraction of the price making it yourself.
It's just a mixture of sand and lime.
Baby step instructions.
Buy a couple of black plastic builders buckets.
Use the bucket to measure how much lime you are using if you do not keep the mix the same quantity the colour can vary but not by much.
So you could use three buckets of sand to one bucket of lime.
Sand wise if you want it very smooth 02, more rustic 04.
You can buy that in sacks or cheaper loose delivered.
If it's being delivered plastic sheet under the sand to stop the weeds growing through it.
Gloves on when mixing or pointing and watch for sand in the gloves it cuts your hands.
Mix the lime in an open space as it's not respiratory friendly.
Try a small mix first you want it nice and sticky, do not forget to wet the wall first.
If its burning hot in the sun give it a miss.
Thank you - We have a cement mixer. How about colour though, to get the ton pierre (creamy look) look? Also what is the difference in the types of lime? hyrdraulic/white?

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Re: mortier de rejointement - colour match

Post by mysty »

If you go to a good builders merchants they should have a sand that's not too white that makes all the difference, the lime depends on what they stock.
Most do one I think its tradlafage it has some white cement through it which is ideal for outside pointing.
That will give you the ton pierre colour.
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Re: mortier de rejointement - colour match

Post by Aardvark »

Nice tip about putting down a plastic sheet before dumping the sand on it. I learned the hard way but never managed to stop the toads burrowing into the sandpile. Had one or two oops! moments when digging a spadeful of sand and finding a toad asleep in it. :?
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