Fixing natural Stone to external block work

hexosan

Apart from using cut strips of 4" galvanised mesh embedded in the block work as the external leaf is been constructed can anyone come up with another solution.

I've heard mentioned on here that when the mesh is cut the exposed end is no longer galvanised and could potentially rust down the line.

Any info would be appreciated

declan52

Use butterfly cavity wall ties. Basically a figure of 8 that are built into the wall and you bend them to suit your stone

glashanator

Hello Hexosan,

If you were really worried about the mesh being exposed or not galvinized. Could you not dip the ends of the mesh after you've cut them in galvinized paint, or maybe OWATROL OIL.

WUFF

Much better fixing achieved if you get the guy building the stone to drill and plug galvinized or stainless steel L ties to the blockwork as the stone is built up.

One other problem with leaving out strips of mesh is that as the stone is built up the mesh tends to be bent up or down depending on the level of the stone therefore its not really providing a proper fixing.
Using L ties a bit more expensive but much better job if done correctly.

acehigh76

L ties are a much better fixing but they are very time consuming. I honestly have never heard of expanding metal or galva band rusting and the stone face of a house collapsing though so maybe nothing to worry about

shedweller

Could the resulting gap be filled with insulation?

hexosan

What gap ??

shedweller

Sorry i thought there would be a gap. My bad.

tred

shedweller wrote: »

Sorry i thought there would be a gap. My bad.

any stone mason worth his salt, would be recommended applying the l wall ties as needed as they are building. one time ud see the block work riddled wiht galvansed ties, all over the place before the mason is on site. you cant anticipate the position of stones, or where the tie should be. better done in situ as they are building. masons would prefer this anyway.

acehigh76

tred wrote: »

any stone mason worth his salt, would be recommended applying the l wall ties as needed as they are building. one time ud see the block work riddled wiht galvansed ties, all over the place before the mason is on site. you cant anticipate the position of stones, or where the tie should be. better done in situ as they are building. masons would prefer this anyway.

the galvanized mesh will bend up or down to suit the stone . that is why its used and no stone mason would want to fix as he goes unless he's getting paid extra hours for time spent doing this.

tred

acehigh76 wrote: »

the galvanized mesh will bend up or down to suit the stone . that is why its used and no stone mason would want to fix as he goes unless he's getting paid extra hours for time spent doing this.

most of those galvanized mesh, are all hammered back out of the way, when they are in the way....takes minutes to fix as u go along and an A1 job. Thats an opinion. There are always different opinions and differences between the A1 job and the B1 job, time shouldn't come into it.

acehigh76

tred wrote: »

most of those galvanized mesh, are all hammered back out of the way, when they are in the way....takes minutes to fix as u go along and an A1 job. Thats an opinion. There are always different opinions and differences between the A1 job and the B1 job, time shouldn't come into it.

like I said in an earlier post L ties are a much better fixing. but 95per cent of stonework built in the last 20-30 years has been with mesh or galvaband and there isn't a problem with it . maybe 4 per cent is double sided stone which doesn't need mesh as its tied through a 100 mm block wall with 100x215 holes in it and 1 per cent if that is done the way you're on about so why would you do something that takes a lot longer and I know because I ve done it when building regs , engineers ,project managers and stone masons don't have a problem with it.maybe we should condemn all this b1 work lol

glashanator

I've never heard of stone falling away or crumbling , or anything untoward on a house or building because of rusting galvanised mesh. I'm pretty sure around these parts nearly all stone work has mesh attaching the stone to the wall. And stone has been pretty popular the last 20 or 30 years.Think the Op is being over cautious to be honest. Sure it may fall away in about 100 years, but by then its someone elses problem. Just my 2 cents.....