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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Building Questions >> Repairing mortar on patio https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1403864753 Message started by Pineapple on Jun 27^th, 2014, 11:25am

Title: Repairing mortar on patio
Post by Pineapple on Jun 27^th, 2014, 11:25am

Hi

I've tried repairing some mortar using a measured amount of sand, cement and water. I had to do the job over a couple of days, but on each day the mortar dried to a different colour.

How do I get a consistently grey mix instead of the more yellow shade used on common yellow bricks?

Thank you.

Title: Re: Repairing mortar on patio
Post by thescruff on Jun 27^th, 2014, 1:23pm

To get the same colour you need to match the materials.

Same sand.
Same cement
Same quantities

Title: Re: Repairing mortar on patio
Post by Pineapple on Jun 27^th, 2014, 5:34pm

Hmm. Did that. What ratio would you suggest?

Title: Re: Repairing mortar on patio
Post by thescruff on Jun 27^th, 2014, 6:57pm

What are you doing, perhaps a pic.

If your repairing an external render, you may want to look at "Monorex GM". http://www.parex.co.uk/Render_Systems/New_Build_-_Cement_Renders/Monorex_GM.aspx

Comes in 30kg bags and a mutitude of colours.

Really easy to use.

Title: Re: Repairing mortar on patio
Post by Pineapple on Jun 27^th, 2014, 7:56pm

Re-mortaring a patio

Title: Re: Repairing mortar on patio
Post by thescruff on Jun 27^th, 2014, 8:46pm

The deck or walls. Or do you means pointing the joints between slabs.

Can you post a pic

Title: Re: Repairing mortar on patio
Post by Pineapple on Jun 27^th, 2014, 9:40pm

Joints between slabs.

Title: Re: Repairing mortar on patio
Post by thescruff on Jun 27^th, 2014, 11:46pm

I would mix it at 5 or 6 to 1, do enough for the job in one go, then brush it into the gaps still dry. You can work it in with a stick or whatever comes to hand. a length of 15mm bent copper tube is good.

if you want to point it in any specific way use a trowel dipped in water.

Keep any rain off and the atmosphere will harden it off over night.

Edit,

The slabs need to be dry when you do it otherwise you'll spread it all over the slab and cuss me forever.

Title: Re: Repairing mortar on patio
Post by Lectrician on Jun 29^th, 2014, 11:06am

Yep.

Dry slabs. Dry day. Mix the sand and cement dry (no water). Keep sand dry when stored.

Brush into joints and firm down with copper pipe as above. The mix will absorb moisture over a couple days and set hard.