Tag: backer board

Basement Tub Surround Prep

We’re planning to tile the tub surround in the basement bathroom. The first step was to install Hardibacker board to the studs (with the correct special screws). I’ve read a variety of methods for configuring the backer board and the flange of the tub, and ultimately I just screwed the board to the studs and left a small gap above the flange. I believe the idea is that by leaving a gap, there’s enough thinset to hold together and not crumble. I put fiberglass mesh tape on all the board seams, including across the gap above the flange, figuring it would also help hold it together. Then I thinset over the seams, the screws, and the flange completely, to make a nice even substrate for the tile.

I didn’t put any vapor barrier behind the board. Instead, after the thinset cured, I applied two coats of RedGard over the board to create a waterproof surround. In theory, the water should never get into the wall system this way, but if it does it should still be able to dry. I haven’t drywalled the inside of the mechanical room yet. My intention is to thoroughly test the shower for leaks before we insulate and drywall the other side of that wall. I highly recommend the plastic sheeting over the tub; it caught more than a couple drops. The next step for the tub is tiling, but before that I need to finish mudding the drywall.

Basement Permanent Wall Drywall Hanging

Dean and Hector

Dean and Hector

Dean and his dad, Hector, came over on a Saturday to help me put up the drywall on the permanent walls in the basement. All of the permanent walls were also insulated with Roxul Safe’n Sound for sound proofing, as well as reducing both condensation on cold water pipes and heat loss on the hot water pipes. We’re using ⅝” moisture resistant (green board) drywall for all of the permanent walls in the basement. We’re still working on our water issues and I don’t want to replace anything we’re putting in because it got wet. Using ⅝” instead of ½” adds addition sound proofing and fire protection.

In the case of the bathroom, the first step (after putting up the ceiling) was to install the tile backer for the tub surround. We’d originally planned to install a fiberglass surround that fit the tub, but even though I ordered the correct piece I received the wrong one. We didn’t realize that until the plumbers tried to install it. When I went to get the right one I found they were out of stock across the city, so we just gave up and decided to tile it. It’s more work, but the cost is similar and it will look nicer, plus I’ve got a cool idea in mind that I’m going to try. I bought Hardibacker instead of regular cement board and screwed it to the studs with the appropriate special screws. After a variety of conflicting information and opinions from various sources, I elected to install the bottom edge of the backer board ¼” above the tub flange. In a couple of spots the gap was bigger than planned so I went behind and added some wood blocking between the wall studs.

It took most of the day, but we got all of the drywall hung. We have one section of exterior wall framed and drywalled right now because it has plumbing on it and we want to put cabinets on it. I got to use my collated screw gun (previously employed for screwing in the first floor subfloor) to rapidly put up screws with decent success not under or over-driving. My skill level is improving, but it does leave room for improvement. The rest of the exterior walls will be done when we refinish the basement into an entertaining space, and the temporary bedroom walls will be drywalled as soon as they’re framed. For the duration of us living in the basement we’ll have the exposed brick and rafters “loft” look, which is fashionable right now anyway. After hanging the drywall (and backer board) the next steps are mudding and taping the drywall and backer board seams.

As always, a big thanks go out to Dean and Hector. Once again they’ve been a huge help!