The most important step in installing a shower or bath/shower door is measuring. While these doors have a certain amount of flexibility for openings that aren’t quite square, it’s important to begin with the right measurements so you can select the correct door for your application.
• Measure top width ( A ) of shower opening, measure bottom width ( B ) and height ( C ).
• Choose the largest measurement ( A ) or ( B ) and round up to the nearest fraction.
NOTE: If you plan to include steam in your shower, the door will need to be a steam door-one that reaches to the top of the shower enclosure to keep the steam in.
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