The Thrufold system design allows between 12mm and 19mm of clearance underneath the doors to accommodate the floor covering.
To ensure, after installation, there is sufficient room for carpets or wooden flooring underneath and thereby eliminate the need to trim the bottom of the doors, the frame must be positioned so that the jambs touch the concrete or the floorboards.
Remember:
Simply cut the timber frame lintol supplied in the kit to suit the size of doors purchased if you have purchased one of the smaller door sizes.
See each product for exact details such as sizes and fitting instructions.