Patio - no geotextile membrane

If it’s bedded with 5pts sharp sand and 1pt cement and the bed is substantial 12mm (average depth). The ground underneath the bed must be prepared appropriately (weeded and defoliated). Finally, pointing the patio with a wet 1pt cement 3pts yellow building sand. (Bricky mix) and the mix is ‘heel driven’ in to the cavities under pressure not swept in and left. It’ll be solid and sound and therefore guaranteed for at least 10 yr.