Here’s the dilemma. The customer wants a recessed shampoo niche. But once the walls were opened up there is no good place to put one.
There are either wires and pipes in the way or the stud bay is too narrow. The only good place to install one would be on an exterior wall which would leave a big gaping hole in the home’s insulation. So what’s the best way?
One option is to install some elegant shower corner shelves. But if their heart is set on a recessed niche?
To rule out an exterior wall for a shower niche can sometimes mean that you just can’t put one in a shower. But do you just ignore the giant cold spot (or hot spot, depending on your climate) and put one in any way?
Estimated reading time: 5 minutes
Insulating a Recessed Shampoo Niche in an Exterior Wall of a Shower
Here’s a method that I have come up with to make the best of both worlds. A compromise.
You still get the recessed shampoo niche in the shower and some insulation as well. Here’s how it works:
Most exterior walls are 2×6 framing. I recommend buying a pre-made foam niche such as the Laticrete Hydroban niche, Noble Niche, or Schluter Kerdi Niche.
They come in a variety of sizes and are made to fit in a typical stud bay. Some come with shelves and compartments.
Be sure to look at my 4 part series dealing specifically with shower niche installation: The Ultimate Guide to Building a Preformed Recessed Shower Niche
How much R-value?
We know insulation is rated in terms of r-value. The foam niches are made from a foam called polystyrene. This type of foam has an R-value of 5 per inch. This would give the pre-made foam niche an R-value of 2.5.
Now the pre-made foam niches come 4 inches deep. This is to allow for 3.5 inch wall stud (common in interior walls) and 1/2 inch tile backer board.
Since the niche will go on an exterior wall (5.5 inches instead of 3.5) this gives 2 inches of unused space.
Down at your local home improvement center, you can buy 2-inch polystyrene foam. I bought this blue foam and it comes in a 24×96 inch size and costs approximately $30.
This is what I use to fill the 2-inch space behind the niche. An r-value of 10 (remember: 5 per inch) added to the 2.5 from the niche gives you an r-12.5 wall.
Less than a normal 2×6 wall with an r-19 value but still better than a window.
Currently, I’m not aware of a way to purchase smaller sizes of the 2-inch foam. It’s not that the cost is overwhelming but you would only use a small piece of it. I wish you could buy by the foot.
How to install a recessed shampoo niche on an exterior wall of a shower
This is what I’ve come up with for a way to install a recessed shampoo niche in an exterior wall without leaving a big hole in your wall’s insulation.
If you have a way to improve upon it or see any issues that I may have overlooked please let me know in the comment section.
Installing a shampoo niche on an exterior wall isn’t ideal but sometimes the benefits outweigh the drawbacks. Using this method can help regain some of the energy loss.
do you think an inch of sheet rock between the 5/8 sheathing and half inch hardi backer would be sufficient or should I go for this method. thanks
You’ll have to determine what is best for your particular situation. I’m not sure what the R value is for drywall or where the vapor barrier is in your wall assembly.
I purchased a Laticrete niche for use in an exterior wall. I initially chose this location because I didn’t want the “water wall” to appear too busy with valves, handheld shower wand, bench and niche.
Unfortunately, I’ve got 2×4 studs instead of 2×6 and the stucco intrudes into the wall space up to 1/2″in spots.
Would you recommend adding 2×6 sister studs to the exterior wall and frame a spot for this preformed niche, or build one to suit available space on the water wall?
Thanks,
Shane
You may have to build a custom niche. It may be a bit challenging with the uneven backing. If you are able to grind the back without affecting the siding then that would be ideal. One thing you could do is extend the sill past the wall at the bottom of the niche to give yourself a bigger shelf to put things on.
Hello, I like your installation which do not show any edge of tiles. I do not see any edge either front or inside of the niche. Would you share how did you do it?
Thanks! It’s done by beveling the tile edges. I talk further about it in this post.
5 Tile Edge Trim Options Besides Bullnose Tile
The water proofing if the shower is considered an acceptable vapor barrier.
An inch of sheetrock gives you only an R value of 0.9 (gypsum board has an Rvalue of 0.45 per 1/2 inch sheet). So, no, two pieces of sheetrock wouldn’t come even close to the R value of the polystyrene foam which has an R value of 5 per inch.
Not all waterproofing layers also qualify as vapor retarders. Depends on the product and how it’s applied.
Thanks for the contribution!
The R value of sheetrock is very low. Use foil-faced polyurethane or polyisocyanate foam instead that has an R value of 6.8/inch.
I’m in the same situation. Could a can of spray foam insulation do the trick?
I would really like a large say 16×30″ niche along the bath wall but once opening it up it is just tile thick then two layers of gypsum and then breeze block??? I can not have one can I? ?
If you see two layers of gyspum a lot of times I see that with multifamily housing and that’s a shared wall. Not sure if that’s the case, or not?
If you don’t think it will work on the back wall you might try the other walls. A lot of times I’ll have the plumber reroute the shower head pipe to accomodate a niche.
Otherwise, you may want to consider built-in shelves or some other way of storing things, I suppose.
So is a niche in a 2×4 exterior wall definitely a bad plan? It would leave almost no room for insulation.
For climate I’m in southeast Pennsylvania.
I personally don’t think it’s a good idea because of the lack of insulation. If you can put it in an interior wall that would definitely be preferrable.
I am putting one in my exterior wall and I’m in Pittsburgh. However, my house has T-111 plus a foam wrap, plus foam core vinyl siding, so I have a similar setup as describing, by the foam is on the outside of the house rather than inside. It’s a lower R-value for sure, but I don’t expect to see much of an issue for such a small area. I have an attic space that is accessed just with a slide on/off piece of 1/2” plywood, with no insulation, about 2’x3’ dimension and I don’t get much draft there with no insulation.
I am in Florida and my exterior wall is bricks masonry, can I break part of the bricks to make the niche? I mean I know Incan do it, my question is if is something that I should not do for some reason.
I wouldn’t recommend it as that’s the exterior of the home. Shouldn’t there be more than just brick between the interior and the exterior?
I use both, spray foam is a good sealant
I have a kerdi niche that I am planning on installing on an exterior wall because I’m limited on where to place it. The walls are 2×6 and the niche fits nicely in-between. I was wondering if I can just “squish” down the insulation and place the niche on top on the existing insulation in the walls? Or would this compromise the benefit of the insulation all together? Thanks for all the advice!
It might be too much to squish. You’ll have to wait until you get the wall opened up. If you end up having to remove insulation then it may make sense to go with foam instead.
What about a niche on exterior wall in the mid-west.
Brick home, with 2×4 frame, and full sheathing . All 4 season.
Thanks
You’ll have to make a determination for yourself but I don’t think it’s a good idea.
Hello,
Thanks for sharing your idea of using the form board. If I want to use a custom size niche on the 2×6 exterior wall, what do you think if I just use the form board itself as the backerboard, on which I put waterproofing membrane (Tec HydraFlex or Mapei Aquadefense) and fabric tape around the inner corners? Do you think that is a bad idea? I wonder if the foam board is hard enough as backerboard, and also if waterproofing membrane will stick to the foam board. I’d greatly appreciate your response!
That would probably work fine
I wonder if anyone has some thoughts on using a heating element behind the cubby in colder climates? It could be low wattage of course, and on a permanent circuit. Anyone have experience with this? I know Schluter makes floor heating systems, so why not cubby heating? More complexity, but you could add a timer to run at programed times.
Comments?
I suppose that could be done. I don’t know of an off-the-shelf heating unit that could be used as they would all be too much wire but something could be customized if the desire was there. This is more of a “treating the symptom” way of going about it though.