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Lightening Coloured Mortar in new Fireplace

Postby Tomsmr » Sun Sep 06, 2015 1:42 pm

We've just had a fireplace (for a woodburner) rebuilt & had asked the builder to repoint with mortar that would dry a light colour (was previously lime mortar). It's come up darker than we'd hoped - is there anything we can put on it to lighten the colour (e.g white blackboard chalk?) that would be heat resistant? Many thanks!
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Simply Build It

Postby thedoctor » Mon Sep 07, 2015 9:32 am


You could always use heatproof paint or try a selection of coloured chalks Tom but in all honesty its a whole lot better to rake out the mortar and start again. There is a page on the website about matching mortar colours and we suggest in this page that you mix a little bit first and leave it to dry so you can be sure of the colour before you "attack" the brickwork. See

The easy way to rake out the mortar is to put one of these ... r-bit.html in your drill. It doesnt take long and this way you can be sure of a consistant colour before you start.
mortar rake.jpg
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