Screed/concrete the inside of the cover recess, again leaving depth for subsequent floor finishes. A stepped strickle is easily made and assists with filling the cover.
Note: In instances where there is insufficient depth to apply a screed sub-base prior to finishing, lay the flooring directly onto a mortar bed. This is particularly applicable to external installations (Fig 12 and fig 13)
Fig 12 – External installation with fresh mortar bed.
Fig 13 – External paving set directly on mortar bed.