Underlayment for floor in prep for porcelain tile - Beyond.ca - Car Forums
Results 1 to 4 of 4

Thread: Underlayment for floor in prep for porcelain tile

  1. #1
    Join Date
    Jul 2003
    Rep Power

    Default Underlayment for floor in prep for porcelain tile

    Just wondering for those who have installed ceramic/porcelain tile in the bathrooms what underlayment you used.

    Our existing bathrooms have lino and then K3 board (particle board underneath.

    I've heard many different ways and most popular is to remove the lino and K3 board and screw down plywood and then thinset and tile.

    Then I've been told by some tile shops that wonderboard is fine on top of your subfloor after K3 has been removed. Again, thinset over wonderboard and then tile.

    How thick of a substrate do I need before installing tile? 3/8 or 1/2" ?

    sig deleted by moderator, click here for info

  2. #2
    Join Date
    Feb 2006
    My Ride
    19 C117, 60 Valiant, 09 JK, 07 Rabbit
    Rep Power


    I have family who are tile setters, and I have had them do several floors for me.
    If you remove the K3 then use " plywood.
    If the lino is in good shape (not coming up anywhere) you can screw the lino down with drywall screws-one every 6", then sand the lino to scuff it up.

    I think you need to add something to the thinset like an epoxy to help it adhere,
    although that is the econo way to go. Shouldn't be a problem on a small floor like a bathroom.

    I should also add they are Dutch and I am Scottish so birds fly over my house going "cheep cheep"!

  3. #3
    Join Date
    May 2003
    My Ride
    -10 F150 Lariat, -10 Fusion SEL awd
    Rep Power


    total subfloor thickness should be 1 1/8 inches thick. (as seen on the side of mortar mixing bags. I have also heard wonderboard is BETTER to tile over as the thinset is supposed to adhere better, but it is substantially more expensive than plywood which is used in almost every new home and they dont seem to have any issues...

    oh ya, the particle board HAS to go. it has too much flex to it and you will be fixxing cracked grout joints regularly.

    1997 TSi AWD 2.3L 6 bolt (Carillo Rods, Wiseco pistons, Cometic headgasket, ACL bearings, removed BS, FP3's, Crower springs/retainers, ARP hardware), FIC 950's, Aeromotive AFPR with SS lines, Walbro 255HP, PTE SCM61, Tial wastegate, Greddy Type S BOV, short route FMIC, 3" turbo back, AEM EMS, 3 bar map conversion, BJs SMIM, 75mm TB, Innovate LC-1 Wideband, 18" Focals, Bridgestone Potenza RE040's, Tokiko suspension.

  4. #4
    Join Date
    Mar 2004
    My Ride
    some blue car
    Rep Power


    Originally posted by ianmcc

    If the lino is in good shape (not coming up anywhere) you can screw the lino down with drywall screws-one every 6", then sand the lino to scuff it up.
    I'd go with this suggestion
    Lino is not that difficult to remove from the K3, but the K3 will be bitch ass to remove from the subfloor.
    It's glued down and stapled to the subfloor, when you try to remove it it breaks up so you have to remove small chunks at a time.

    I usually just suggest laying tile on top of the lino when people want to switch from lino to tile.

Similar Threads

  1. Porcelain Teeth

    By visualk in forum Health and Fitness
    Replies: 2
    Latest Threads: 01-06-2010, 07:00 PM
  2. Floor and wall tile.

    By frozenrice in forum General
    Replies: 8
    Latest Threads: 03-01-2009, 08:57 PM
  3. FS: High Grade Porcelain (1/4" thick) 12 X 24" tiles **Cheap**

    By maximus5502 in forum Miscellaneous Buy/Sell/Trade
    Replies: 0
    Latest Threads: 01-23-2008, 01:08 AM
  4. prep and primer for bumpers

    By AutodreamMarvin in forum Performance Modifications
    Replies: 5
    Latest Threads: 04-28-2003, 10:56 AM
  5. Painting Prep?

    By Toms-Celica in forum Performance Modifications
    Replies: 14
    Latest Threads: 04-25-2003, 12:22 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts