External insulation fixings.

glaswegian

Hi, does anyone know what type of fixings there are for external insulation?
I'm looking to fix a door canopy but don't know what fixings would suit best, it has to be fitted to a timber framed extension with 5 inch rendered insulation.
Cheers.

Calahonda52

IMO too late for that now without damaging the EWI and possibly voiding your g/tee

Alkers

I've used these (for much smaller loads): https://www.fischer.co.uk/en-gb/products/fixation-on-etics-insulation/fixing-in-insulation-material/insulation-fixing-fid/48213-fid-50

They have several variants, one of which might suit: https://www.fischer.co.uk/en-gb/products/fixation-on-etics-insulation/fixing-in-insulation-material/insulation-fixing-fid

glaswegian

Thanks, there was already a canopy there which lost it's panels, i have to fit a new one but it's a different size hense i need fixings.

glaswegian

Thanks Alkers, i was looking at that type in Chadwicks earlier but i don't think they would be strong enough if a gust got up. the fixings used for the previous canopy had a threaded bar and a nut but i don't know what the other end looks like as it's in the insulation.

listermint

Do not use them fittings on your insulation. They're barely good for holding a down pipe bracket. I have them.

If you've existing threaded bar fittings use that an modify your new canopy to suit. Do not take chances with the insulation and something of that weight youll rue the day when it wrecks the render and breaks the EPS beneath

Alkers

The ones I linked to we're the ones I've used but they also have ones intended to go through the insulation and into the wall behind, they've a whole section for various applications with external insulation if you have a good browse of their website
E.g. https://www.fischer.co.uk/en-gb/products/fixation-on-etics-insulation/thermax/thermax-12-and-16/thermax-16

Darando

Alkers wrote: »

The ones I linked to we're the ones I've used but they also have ones intended to go through the insulation and into the wall behind, they've a whole section for various applications with external insulation if you have a good browse of their website
E.g. https://www.fischer.co.uk/en-gb/products/fixation-on-etics-insulation/thermax/thermax-12-and-16/thermax-16

I used Masonry Fixing in Cherry Orchard for many of the Fischer products (https://www.masonryfixings.ie/), they might be able to help/advise also.

the_pen_turner

listermint wrote: »

Do not use them fittings on your insulation. They're barely good for holding a down pipe bracket. I have them.

If you've existing threaded bar fittings use that an modify your new canopy to suit. Do not take chances with the insulation and something of that weight youll rue the day when it wrecks the render and breaks the EPS beneath

i would be more worried abut a dent in his head than the insulation

listermint

the_pen_turner wrote: »

i would be more worried abut a dent in his head than the insulation

Fair point I think you'd have to spread the load out over a board

glaswegian

Thanks all, i got in contact with the builder who built the extension, he advised 6" concrete screws into the blockwork beneath the insulation.

DublinDilbert

glaswegian wrote: »

Thanks all, i got in contact with the builder who built the extension, he advised 6" concrete screws into the blockwork beneath the insulation.

take care not to compress/crack the insulation / render as you torque down the screws. If it is 4" insulation you will only have 2" of the screw in the concrete. You could use an off cut of pipe/tube inserted at each point where you are going to screw down the bracket. So that the screw pushes on this and not the insulation.

I would drill into the concrete, clean the holes out with air and chemical anchor in some threaded bar. You wouldn't need too many of these to hold serious weight. Then put a nut onto the bar and just snug it up against the insulation before putting on the bracket.

If you aren't comfortable with chemical anchors use a couple of hilti bolts.

glaswegian

Thanks all for your advice, i used 6" concrete screws, they seem to have tightened sufficiently to hold the brackets.