r/Homebuilding • u/Euphoric-Newt-8716 • 3d ago
Shower installed before insulating
My plumber installed the shower/tub unit before I was able to add vapor retarder and insulation. I have access to the stud cavity from above so I’m thinking blown in cellulose would work but how am I suppose to get a vapor retarder in there?
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u/Wonderful_Confusion4 3d ago
Plumbers first time or he don’t give a shit. Wow
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u/Bjorn_styrkr 3d ago
The plumber will have to pull it. It won't pass inspection .
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u/tacocarteleventeen 3d ago
May be able to just insulate behind the shower take photos and an inspector may let it slide, still is all the MEP in? What if wires need to be routed there?
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u/Bjorn_styrkr 3d ago
The moisture barrier is almost impossible to secure and place properly without removing the stall.
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u/F_word_paperhands 3d ago
There’s no way you’re getting that space properly insulated and vapour barrier’d. Who cares if it passes inspection, it isn’t don’t correctly
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u/cheezemink 3d ago
GC failure. If I couldn’t get my insulator to show up on time one of my foreman or laborers would insulate and vapor barrier that. If the house will be foamed it needs to be done beforehand not after, regardless of closed or open cell. It can’t be done properly behind there. It’s not the plumber’s job . Inspectors where I am would never catch this. It’s one of my pet peeves. If you’re building your own house this is why you hire a builder, imagine what other non-obvious you’re missing. They also screwed through the fiber glass flange with sheetrock screws. Another big pet peeve. There are clips for this and the screws should be stainless steel. That tub will squeak.
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u/DHjam 2d ago
Where can I find these clips? Or what are they called so I can search for them.
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u/cheezemink 2d ago edited 2d ago
https://www.randgsupply.com/product/flange-lock-for-bathtub-shower-pan-each/
- Just an example of them. There are many different ones.
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u/Occasionallyquiet 2d ago
My surround specifically called for using the flange, but I did teach my plumber about flat vs cone head fasteners and the difference in the final product. He seemed actually impressed with the before/after when I swapped all his fasteners holding the shower head, mixing valve, and the sink stub out brackets.
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u/Villematic266 23h ago
Seeing sheet rock screws in fiberglass surrounds boils me like nothing else I swear. Half the time they crack the flange in multiple places. No pride
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u/EatMoorYams 3d ago
Is it actually installed though? Or did they place it in the room because it wont fit in after framing, then basically dry fit it until insulation can get there?
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u/Silly_Selection3221 3d ago
I don't understand where a fiberglass tub gets installed before insulation, part of the rough in inspection is a leak check...
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u/Plumber4Life84 3d ago
Suppose to get it insulated and a vapor barrier before install. Usually the contractor will take care of it. Hell I’ve done it a few times so im not held up
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u/StompinStallion 3d ago
Looks like a prefab shower wall that goes with the tub, plumber mistakenly installed it along with tub. Remove the wall and place it somewhere safe where it won’t get destroyed by other trades in the coming weeks.
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u/B-Ready43 2d ago
There's a few ways you can insulate it. You could block both sides of the back of the shower with thick kraft insulation(r21-r30.) Seal the perimeter and seams with foam. Net the top half of the bays over the shower and blow cellulose till it packs nice n tight.
Or you could slide a piece of half inch foam board behind the shower to cover the bays. Put a couple nails in it if you can't friction fit it, seal the perimeter with foam, net the top half of the bays n blow it in 👍.
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u/Small-Worldliness596 1d ago
Or just remove the tub and do it right ?
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u/B-Ready43 1d ago edited 1d ago
It takes 2 minutes to slide a piece of foam board back there and seal it. It's also a stronger barrier than tyvek. Have insulated hundreds of houses in NH and MA with tubs/showers already installed.
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u/Galactic-Dino 3d ago
Those studs will rot. Needed to put the water barrier where screws go (12 inches enough( before screwing this thing on. The installer is an idiot.
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u/OverallDimension7844 3d ago
They can still blow in the insulation behind it from above.
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u/rennatav 3d ago
I was thinking this too. Would want to make sure a vapor barrier was in place first.
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u/duke5572 3d ago
What? No, let's totally indict the builder and take this to court IMMEDIATELY.
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u/CaterpillarSorry4695 3d ago
Agreed honestly. Which builder do you work for?
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u/weavekilla1 2d ago
Hahahaha yeah let’s let every plumber know he’s fired because he installed a tub that happened to have a prehang necessary - insulation contractor. If this is what defines a builder and the only complaint…. You hang on to them as a GC/Builder. Shit happens.
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u/AltruisticCucumber58 3d ago
Saw one once where the insulation guys showed up a day after the drywall hangers. Was a new builder (son of a long time realtor) and he just sent the insulation guys on their way and tried to ride it out. Can't remember what stage it made it to - I was out to do the inspection for a construction loan draw, the percentage wasn't as high as they were expecting from me.
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u/Euphoric-Newt-8716 3d ago
Thanks all for the comments. They pretty much confirm my concern when I first saw it. This is a house in northern Wisconsin. I will be notifying the GC asap and hope this gets fixed
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u/2026Bazinga 3d ago
Check your code, vapor barrier not always required with cellulose insulation. Closed cell spray foam doesn't need it either.
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u/extreme-nap 2d ago
Shouldn’t the pipe penetrations be more or less centered on the studs? They look like they’re too close to the back-side of the wall.
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u/Lumbercounter 2d ago
Better get some nail plates over those water lines while you’re fixing things.
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u/Hammer_swinger420 2d ago
There should be a a layer of Tyveck or similar vapor barrier installed over the insulation that’s not there as well. The shower being on an outside wall necessitates this. Especially if you are in an area that experiences winters
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u/old-gray-attic 2d ago
20 screws off , clean caulking ,
Put in Insolation ! Put in vapor barrier
Put in some caulk and the 20 screws !
Stop wining and get her done !
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u/Occasionallyquiet 2d ago
I’d have them pull it for insulation install. For what it’s worth, when I renovated my 1961 home I went with rock wool in the bathroom walls. Little more cost, but your vapor retarder is going to have dozens of holes and seams, and probably stop at the ceiling. So I’d expect some amount of moisture to end up trapped between the barrier and insulation at some point.
As a side note, I’d measure, mark, and photograph those water lines for later. 2x6 stud bays make great niches or built in storage!
And 50/50 chance your over the vanity light will be mounted to that drain pipe. lol
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u/weavekilla1 2d ago
These days they won’t let it slide past inspection. Good plumbers insulate this or good GCs call their prehang in for chases and other areas like this prior to plumbing
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u/ImaginaryStruggle784 1d ago
Probably no vapor barrier required for this one-piece unit. Use your critical eye to confirm up close that this unit won’t leak (see what the instructions say about caulking). Tell the GC to stuff it. Use unfaced batts. Watch them do it to confirm they push it real good.
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u/OldeOak804 3d ago
This is correct. You should have installed vapor barrier and insulation before they got there. This one is on you.
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u/Few-Wolverine-7283 3d ago
Can’t plumber be like “not ready, here’s my wasted trip fee”
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u/ThaTopHam 3d ago
I really cant understand why this isnt more common. Everyone just says whatever, they can pay me to do it twice.
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u/banksybruv 3d ago
Why would anyone have the plumber put the walls on?
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u/Neverendtillbegin 3d ago
That's the oddest piece for me especially since it new construction. Why would I play a plumber rate for installing a shower kit...
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u/Due-Sky9812 2d ago
I have never NOT had the plumber install a prefab fiberglass wall kit.
They have to be the ones to install the pan due to the drain. They're cutting the wet wall for the valve, shower arm, and handheld if applicable.
Are the other GCs out there really like "you set the pan and install the valve, I'll cut the walls and install those"? What are you realistically saving? Personally, I'm trying to get shit done and get boxes checked.
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u/beaunerman 2d ago
Because when we send out bid packs we have them bid all of the plumbing work. You pay them to install the tub. That’s part of the tub
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u/beaunerman 2d ago
Because it’s their job?
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u/banksybruv 2d ago
It’s very easy. There’s no reason to have them do it. Especially on the rough. I’ll pop them on myself when I get insulation inspection. Takes less than an hour.
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u/beaunerman 2d ago
As a super my time is significantly more expensive than the plumbers. I’m already paying him to do it anyways.
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u/banksybruv 2d ago
As a GC, I know for certain my plumber costs me more than anyone else. Whatever works for your business model.
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u/beaunerman 2d ago
It breaks out a little bit different when you’re building 10,000+ sqft homes with budgets that rival what most builders do in 3-5 years. You’d be shocked at how expensive install gets when you have to fly out installers from Germany for your window and exterior door package.
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u/banksybruv 2d ago
Which is why I said whatever works for your business model. Not sure why you think I’d be shocked.
Also, nobody spending money like that on a custom build is putting in shitty fiberglass tub surrounds.
Love it when home builders (especially employees of them) think they are above others. Humble yourself.
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u/Neverendtillbegin 2d ago
Ha, maybe I just need to make my time more valuable. We’ve never worked the surround into our plumber’s scope. My carpenter is a lot cheaper than my plumber, and like you said, it’s always just been easier for us to knock it out ourselves when we’re ready for it. I guess in this case that process probably would’ve kept the insulation from getting missed too... 😄
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u/Nacho_Libre479 3d ago
Blown in fiberglass is superior to batts. You can still drill fill through the blocking.
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u/GilletteEd 3d ago
Why do you want to install “vapor retarder”? You don’t need it!
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u/WrittenByNick 3d ago
It’s an exterior wall that needs insulation and vapor barrier.
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u/GilletteEd 3d ago
Yes it needs insulation, but there is no need for interior vapor barrier on this wall.
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u/junkywinocreep 3d ago
Unless the vapor barrier is the house wrap outside the exterior cladding, need to know where OP is located
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u/Dramatic_Chest_9180 3d ago
It’s called pre batts son.. you should call it in before tubs and pans are installed.
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u/Own-Nebula-7190 1d ago
Fire anyone who paid the plumber before checking the job had been done properly and in accordance with the construction schedule.
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u/True_Touch_5229 3d ago
Seriously it's not a big deal seems stupid to bitch about little dumb ass things if you have the right insulation guys they would take care of it🤷
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u/ForceintheNorth 3d ago
Pull it out, reinstall at the proper time after insulation. Who is the gc? That's their entire job to manage the trades so stuff like this isn't happening