Step 1. 

• Decide how high you want the bath above the floor.
• Measure and mark up.
• It is recommended that it should be at least 450mm above the floor.
• Once you have marked the height, securely fasten support battens against the back and sidewall.
• Make sure they are level.

Step 2. 

• Position the bath with the backside resting on the battens.
• Check that the bath is level by using your spirit level.

Step 3.

• Place three equally spaced rows of bricks, with ample mortar, under the reinforcing ribs of the bath.
• This will support the underside of the bath.
• Check that the first row is as close as possible to the waste fitting.
• Check that the openings and sides are now level with the ends of the battens.
• Install taps and waste pipe and fittings, if you have not already done so.

Step 4.

• Finish the frame.
• The outside of the frame is often tiled to create a cohesive bathroom design.
• Make sure to leave an access area if you are installing a whirlpool tub (for future repairs).
• You can finish the frame with any materials that work with your interior design.