Fixings for use in insulation boards

[morqthana]

I've got EWI on my house (90mm XPS + about 20mm silicon render).

I'm looking for things to use for fixing light loads to it, such as the Fischer FID 50 & 90, or the Swifix SWI-SR.

Struggling to find alternatives, as every bleeping search I do returns me things for fixing insulation boards to walls or studs, not fixing things to the boards.

Anybody help with products? Or a term I could search for?

Also looking for alternatives to the Swifix SWI-ST https://www.swifix.co.uk/product/single-fitting/ for when I need something more heavy-duty than the above but don't need to go down the chemical fixing route.

 

[catlad]

Concrete screws.

 

[morqthana]

Into polystyrene?

 

[freddiemercurystwin]

This has come up a few times before on the site, AFAIK there is little alternative to the Fisher or Swifix products. https://www.diynot.com/diy/threads/screwing-into-exterior-insulation.611399/#post-5483630 For an absolutely solid fixing you would chop out a chunk of insulation and fit a solid timber or similar packer the same depth as your insulation and then make good around it. It's one of the little things this particular industry fails to tell it's customers, meantime they've had their money and they don't care.