Bifold doors and patio with zero threshold

[happyfrogger]

Does anyone have experience of fitting bifold doors with zero step threshold down to outside? My glazier and builder are saying I have two options -either a sill for my aluminium doors and a step down to a stone (or similar) patio, or if I want zero threshold / step I have to do decking or composite on top of the sill (to bring up the height).if I put something in top of the sill it must be porous so cannot be patio. I like patio. My only other option is a lead lined drainer beneath the earth so I can have a patio with zero threshold and no sill - but this will cost me 2k more all in all.

So, my question is, does anyone know if composite patios exist? I would ideally like a composite that looks like patio slabs and not like wooden decking. If I could find this, I could save a lot of money!

Thanks in advance.

You need a slot drain like this www.pavingexpert.com/images/drainage/linCh_steel.jpg so you only see a slim channel between surfaces and a larger drainage channel beneath. Also, make sure they put a gentle fall away from the house (and the drain subsequently) so that most surface water will run the opposite way.

It's really not. You need this: www.screwfix.com/p/floplast-threshold-channel-drain/8490G?kpid=8490G&ds_kid=92700020953276721&ds_rl=1249799&ds_rl=1245250&ds_rl=1249481&gclid=EAIaIQobChMIlInU1cHl2wIVCFXTCh1GYARcEAQYAyABEgIQVvD_BwE&gclsrc=aw.ds&dclid=COPY4NjB5dsCFRBj0wodIb4LAg in front of the doors - only a 12mm strip shows. Either side of the doors, Use the standard drains @ £45 for x1M sections.
Feed into your nearest down pipe drain.
Job jobbed.

it is possible watch this

My door has inbuilt channels in the external sill ( the middle line) - water travels down to the bottom and is discharged via spouts. My builders put a little channel at the bottom of each spout and then mortared round this and laid a stone patio. The channel means water is free flowing to the ground. It is totally flush. It rains lots here and we are leak free!