Just learning, Floor Prep. Wood sub floor

Old 03-09-16, 11:45 AM
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Just learning, Floor Prep. Wood sub floor

I am just now trying to learn about tiling and wood sub floors and am on a tight budget but am forced to replace current pergo flooring after my ice maker line leaked and buckled said flooring. According to internet and some YouTube I have heard that I need my sub floor to be 1 1/4" thick before installing tile. Is that a definite or is there a cheaper but efficient way of doing it? Why does it have to be so thick? Can I just lay the Hardibacker on my existing floor and continue on?
Old 03-09-16, 12:24 PM
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Welcome to the forums Lynda!

The extra thickness helps to make for a more stable and flatter surface to lay the tile on. If the sub floor gives any the grout and possibly the tile will crack. Those that know more than me will be along later and want to know what size floor joists you have supporting the floor and what the span is [how far between supports of the joists]
Old 03-09-16, 01:17 PM
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Yep, as Mark said, let's start at the basics: What's the size, spacing and unsupported span of your floor joists as well as the composition of the floor you have at the moment?

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