Bedding pavers onto bifold cill

[paro]

Hi All - I need to tackle the patio behind the extension in the next few weeks and am looking for some advice on how something is usually done. The origin site shows you just laying a paver directly onto the cill which I cannot believe it an okay way to do this.   There is supposed to be a weathered threshold between the internal and external floor with about 10mm difference. I am going to come down a bit more than that, say, 15mm to make sure the riddculously oversized doors don't have any clearance issues. What is the right method to bring the slabs right up to the door frame over the cill here please?  Not sure if heat related expansion and contraction needs to be considered for the aluminum cill as well.

 

Planning to use large format porcelain pavers.

 

Any advice welcome. 

 

Thanks, Paul

 

 

 

[Nickfromwales]

You can’t bring them to the frame. You’d normally put a slot ACO drain in and then lay up to that, so a linear slot drain deals with rainwater runoff from the doors.

 

You’d need to add an ACO (if you aren't on very permeable ground) and that sits at the end of the sill. Then pavers get laid to that. 

[paro]

That makes a lot more sense, thanks.  This is screenshot from the origin windows video that I watched originally. It always seemed a bit suff to just lay onto the cill. Now need to find a cill that fits.

 

 

Origin vid

 

 

[paro]

If anyone knows of a channel drain that can fit into a 47mm gap under the door I'm all ears. The only thing I can find is somehting that's £210 p/m plus crazy corner prices

 

https://www.aquabocci.co.uk/products/a30-low-profile-drain-120mm-wide-x-35mm-deep

 

Another reason to add to the long list of why I regret buying these overpriced hunks of aluminum.

 

 

[Russdl]

@paro Have you considered a pedestal system for your large format tiles?
 

You could put a French drain under the doors. I reckon that would solve all your issues. 
 

 

 

 

[Mr Punter]

39 minutes ago, Russdl said:

Have you considered a pedestal system for your large format tiles?

 

+1 I have used these and they work well.  You do need a perimeter edge to retain the paving but that is the case whatever you do.