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Thread: What Masonry Filler?

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    Should Get Out More Pirahna's Avatar
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    Default What Masonry Filler?


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    Just wondering if anyone has some advice about exterior masonry fillers? It needs to be flexible as possible.

    The house is an old, grade 2 listed, timber frame with a part render. The timber frame is covered in some posh chicken wire then render over the top, and has a few decent length cracks that need sorting. The first stage is to open the cracks with an angle grinder so it's the width of the grinding wheel. Any recommendations for a flexible filler?

    Thanks.

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    Default Re: What Masonry Filler?

    Is it lime render or cement?

    If the latter I'd be tempted to use anything that was sold as a flexible exterior repair mortar. The former needs patching with more lime render or you'll just get more blows around the edge of the repair as moisture from behind it all tries to exit at one point. Lime render can be easily mixed up and is naturally flexible

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    Should Get Out More Makman's Avatar
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    Default Re: What Masonry Filler?

    Purely based on watching fix em up series, I'd say the majority have gone with lime render in keeping with Grade 2 and age of house. Fixes and flexes enough.

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    Default Re: What Masonry Filler?

    Piggy backing on this one, would lime mortar be suitable for patching / filling / leak stopping under a stone set of stairs?

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    Should Get Out More Pirahna's Avatar
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    Default Re: What Masonry Filler?

    Quote Originally Posted by dodgy View Post
    Is it lime render or cement?

    If the latter I'd be tempted to use anything that was sold as a flexible exterior repair mortar. The former needs patching with more lime render or you'll just get more blows around the edge of the repair as moisture from behind it all tries to exit at one point. Lime render can be easily mixed up and is naturally flexible
    Sorry, I should have said, it's cement render.

    I think I might have the solution:

    Open uk the cracks with an angle grinder and fill with this stuff https://www.screwfix.com/p/toupret-t...er-1-5kg/7626h This is a non-flexible filler and will eventually crack, so:

    Paint using this stuff https://bedec.co.uk/bedec_products/extra-flex/ I've been using Bedec MSP paint on external and internal woodwork for a few years and it's great stuff.


    Another question. I've used scrim tape to stop internal cracks re-appearing. Anyone ever used this on external walls?

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