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PostPosted: Sat Apr 08, 2017 1:24 pm 
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Hi Builders,
I just wanted your guys opinion, as I had a conversation with a pointing guy and he said it is best to use mastic and he was grinding the pointing on the brickwork, then he applied linseed oil, as I am not sure it it just linseed oil or double linseed oil.

He then applied red mastic comes in tub ready mixed. He said if I used the sand/cement/lime, then there will be shade different and can not guarantee for one consistent colour.

Once he finished the pointing, he then applied the linseed oil to give it protection for coming years, so you will have a shine on the brickwork. I think he was doing it on nori/Accrington brick, I am not sure.

The front of the house has the Yorkshire/Lancaster stonework, which is weathered finish and he has not looked at it yet, but I am pretty sure this will be sand/cement/lime, as mastic will not work or look good on the stone work.

What do you recommend or your opinion will be much appreciated.

Many thanks

C
http://www.rishtonglass.co.uk/wp-conten ... 0371_a.jpg

https://lid.zoocdn.com/354/255/9708593d ... 8d8bf5.jpg

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PostPosted: Sun Apr 09, 2017 9:46 am 
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Nori bricks were often used with really tight joints. often only a few mm thick. Repointing using sand that's been through a 5mm sieve is obviously going to be tricky, so people either use a really fine sand or mastic.
Your type of pointing is a style known as weather struck and cut, done using a frenchman and straight edges amonst other tools, so either a lime or OPC mortar will have been used.
Colour can be standard with carefull gauging of the materials.



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PostPosted: Sun Apr 09, 2017 10:15 am 
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stuart45 wrote:
Nori bricks were often used with really tight joints. often only a few mm thick. Repointing using sand that's been through a 5mm sieve is obviously going to be tricky, so people either use a really fine sand or mastic.
Your type of pointing is a style known as weather struck and cut, done using a frenchman and straight edges amonst other tools, so either a lime or OPC mortar will have been used.
Colour can be standard with carefull gauging of the materials.


I totally agree with Stuart45. The tight joints that he refers to, we knew as 'Red Rubbers'. The tight joint being achieved by 'rubbing the brick down tight when laying it!
We always used OPC & Soft Sand gauge mixed @ 4:1 (by volume).
This was frequently mixed up in quantity and kept dry. An amount then mixed that you could use in the next hour or so.
As mentioned above, this helped to ensure that the colour match for all pointing was the same.
Only used Lime mix for pointing when occasionally instructed.
I have used both red and light brown coloured mastic and was told the Red was 'brick dust' and the Brown 'ground stone' mixed with Linseed Oil. But all I remembering using them for was to point up the perimeter of Wooden Windows. I have seen Stonework pointed in mastic, but never brick that I can recollect.
One exception to the Soft Sand/Opc pointing on brick that I remember was the substitution of Bagged Silver Sand for the Soft. The result of this visually was good. Equally as good as with Soft Sand.

Hope that helps.
Cheers



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PostPosted: Wed Apr 12, 2017 5:39 pm 
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Thank you for your replies Guys.

What is OPC ?

Please see picture of the job where the guy is doing the pointing and he told me these were very first original Accrington brick, his is a corner house and he has Accrington bricks front and back of the house.

I will send you further picture of my front stonework and back brickwork


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PostPosted: Wed Apr 12, 2017 6:07 pm 
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Picture of the front of the property and it is in stone brick work, as i do not what material they used on the pointing.

It might be sand/ cement/ Lime on the weather struck pointing , as you guys might know better from the pictures.


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PostPosted: Wed Apr 12, 2017 6:13 pm 
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Back of the Property is in Brickwork. But i am in process of removing the paint of the wall, as it more maintenance keep painting the wall. Paint keep flaking off.

I will create a new topic how to remove the paint from the brickwork, as i want to do it myself.


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PostPosted: Thu Apr 13, 2017 1:26 am 
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Hi Caretaker,

In answer to your earlier question, OPC = Ordinary Portland Cement.
The pointing on the Reds, definitely 'Brick Mastic'.
The work is neat, consistent and very good in my honest opinion!

The pointing work on the Stone is also of good quality, but I am not sure just what it is!
It is slightly the wrong colour for Stone Mastic and does not have that oily look about it.
My guess is Sand : Cement + some colour dye. The colour is constant and they could achieve this through accurate gauging by volume.

Getting the paint off!!
Guess I pass on that mate ;)
Nitromors perhaps & wire brushes, you would have to do an obscure test area first perhaps.

Hope that helps.



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PostPosted: Fri Apr 14, 2017 10:15 am 
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Agree with davyp1 that the work is neat. It looks like weatherstruck pointing which is slightly different to weatherstruck and cut which is shown in the photo of the stonework in your original post.
The main difference between the two is that weatherstruck and cut sticks out slightly and is cut out neatly so it makes uneven brickwork appear more uniform.



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PostPosted: Fri Apr 14, 2017 11:40 am 
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Hi Guys
The picture I sent you where the pointing is being done now, it is where the pointing guy is doing a job on another house, as I proposing to give him the work, as he is going to be there for another few weeks.

My property is where I sent you the picture of the bay window, where it has the stonework at the front of the property.

The rear of the property is painted at the moment, but in the process of removing paint and then get it pointed may be in Mastic In red colour instead of sand cement.

I will use the sand and cement for the stonework for weather struck joint , the pointing guy has not had a look yet, as he is quite busy. If I am wrong please let me know, as I do not know if i need to add Lime in the sand and cement,where I am proposing to point the stonework.

When I am going to have the stonework pointed, does this needs to be grinded or you can just directly apply the pointing material on to the existing pointing without applying like brushing the pointing area with water or other stuff, as the last thing you want the pointing falling off may be after a year due to bad adhesion.

I will take close up picture of mine existing stonework pointing,as some area it is good and some area may be missing or loose.

It is raining over here now, so can not do much work outside.

Thanks Guys for looking into the post and replying, much appreciated.


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PostPosted: Fri Apr 14, 2017 9:51 pm 
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You have had to strong sand cement work on the stone, it will need raking out 30mm and repoint in sand/cement/lime mix.


Are you sure that's mastic and not lime putty , although it may look neat, it looks awful, where abouts in the country are you.



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PostPosted: Sun Apr 16, 2017 12:45 am 
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The Pointing guy who is doing pointing at another customer house he has used mastic, which comes in a ready mixed tub and he has applied the Linseed oil before pointing on the grinded joint.

I am based in Lancashire.

Please see image of my existing stonework and pointing, as i took picture of few different angles.

So I will have to take the old pointing off and even the good pointing on the stonework and re do the pointing on the whole stonework wall or shall i just do the pointing where it is needed, but this will show where the pointing will be repaired, which i can live with.


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PostPosted: Sun Apr 16, 2017 7:04 pm 
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If most of the pointing is sound you could have it patch pointed, which would work out cheaper. Harder to match the colour, but darker stands out less than lighter.



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PostPosted: Tue Apr 18, 2017 4:11 pm 
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Hi All,
Thank you all for your replies.

For my Stonework , i will use the Sand and cement, as from the picture of my existing pointing, i can not see lime. However what ratio needs to be followed for Stonework pointing 4:1:1 4 sand : 1 OPC 1: Lime.

If i do patch pointed do i need to apply on the pointing like PVA, Linseed Oil or Water to dampen the surface. I will keep it dark colour pointing as mentioned by Stuart45.

For my rear of the property, once the paint come off,i can either pointed with Red Mastic or Sand and cement pointing.

I went to see the Pointing guy this morning and he is still busy and the weather is not helping due to rain and the customer has given him extra work, so he will be tied up for another 4-6 weeks.


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PostPosted: Tue May 23, 2017 12:01 pm 
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Please see attached patch pointing for your reference.

I know the colour look lighter, as it look like more sand colour, he just used OPC cement and Sand.

He brushed the joint with water before putting the pointing on to the stonework. He did not need to grind, as there was No need.


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