What Fixings to Use in a Flint Wall

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RobFJ

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I'm wanting to put up something on an old garden wall which is now part of a conservatory. The wall is made up of primarily of flints on the outside and rubble behind. The wall has recently been repointed so (a) it looks nice (b) is sound.

There'll be a backing board of thick marine ply (about 70cm long and 15cm high) that I'll be screwing through and I'll probably need to put in 3 or 4 fixings in the wall to take a total weight of up to 15kg..

The size of the backing board is such that I can dodge the flints and drill straight into the mortar.

However I'm wondering what the best fixing will be given that I will probably drill through thr mortar into rubble and the mortar itself might not hold the weight.

Any advice will be appreciated.
 
I have used chemical anchor systems from Zetapro Limited

http://www.corden-bssp.co.uk/product/zetapro-no-2 is one stockist.

I get mine from Anglian Fasteners Ltd in Bedford who sell it as an Own Brand product.

It a two part resin that cures in less than 30 minutes and full hardness in les than two hours ( faster on a hot day.) The applicator gun and nozzle mix it in the correct ratio so it is vey clean to work with.

I have used it on ancient rubble and mortar walls and got secure fixings.
 
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