Patching and Plastering - PL adhesive on Greenboard

Hello,

I need to know if it is necessary to Prime Greenboard before applying an adhesive for a tub surround.

Thanks in advance

Glenn

You won't use greenboard in a wet situation, especially as a tub surround. It is always advisable to install concrete backer underlaymet (cbu) such as Durock or Hardie backer for that purpose. Will you be installing a fiberglas surround, or applying tile?

Hi

Why is greenboard not recommended for this type of app. I have one other suite where I used it and it seems to be quite ok, with a surround.

Since theres nothing on the walls now, I could use either, Would probably go for the tile since I have several boxes in storage.

Glenn

If you are using a plastic/fiberglass surround (1 piece is preferable) green board is better than regular sheetrock..but not a lot. If its a multipiece surround, you need to really make sure the seams are well sealed. Greenboard is only slightly more resistant to water damage than sheetrock. You can still get water wicking in at the bottom,top and seams.

It is totally unacceptable for tile. Tile grout is not waterproof and will allow water to migrate into the backer causing mold and water damage. If it continues long enough it can also cause damage to the underlying framing.

Oh, to answer the question..no, priming shouldn't be needed. Check the installation and use instructions on the surround and adhesive to be sure though.

GG has answered your questions, but I would prefer tile to any type surround system, if you want a quality looking tub/shower unit.

thank you guys, I'll be using a surround, since I already have it. This is going into a rental suite, I did take out tile (1" sq.) stuff that has been there for 35-40 yrs. So this is a good upgrade with out a lot of expense.

thanks again.