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0
votes
1answer
43 views

Do I need a vapor barrier on tub surround with 1 external wall?

I know variations of this question have been asked dozens times and it seems like there is no real consensus. Each post or website I look at seems to advocate something different. I understand that ...
2
votes
1answer
47 views

What's the proper way to flash an inside roofing corner, with self-stick membrane?

What's the proper detail to apply membrane or tar paper to an inside roofing corner, where a sloped roof meets a higher wall at a corner? Of course a metal flashing goes on top of of the membrane, and ...
0
votes
0answers
22 views

What Should I Use to Seal the Concrete Slab under the Joists?

I'm renovating a slab on grade half bath. I'm concerned about moisture/condensation forming under the joists. Should I seal/paint the slab? If so, what product should I use? Most of the products I've ...
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2answers
46 views

Running cable through vapor barrier

I have a manufactured home (2001 vintage) sitting on a crawlspace. (I.e. it has mortared cinderblocks around it rather than skirting.) The home has a vapor barrier attached to the underside between it ...
0
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0answers
49 views

Insulation and vapor barriers behind Corian/Greenboard shower walls

I've got a small bathroom that I am working on repairing/refinishing. I've removed the existing (leaky) shower and base and am replacing them with Corian-like materials (Kohler's Choreograph for the ...
0
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1answer
37 views

Should I add a vapor retarder to an interior cinderblock wall as part of my basement remodel?

I am currently in the process of finishing my basement and I want to know whether, in general, anything should be done to an interior cinderblock wall related to moisture protection. To show what I ...
1
vote
1answer
28 views

Do I need to repair a slit vapor barrier on fiberglass insulation

I am cutting holes in the ceiling to install IC-rated recessed lights and I accidentally slit into the brown paper lining of the underside of the fiberglass insulation. Do I need to repair the cuts ...
0
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3answers
93 views

Do you tape kraft faced insulation?

So I am going to use 12" R-38 kraft faced insulation in my attic. I plan on face stapling the paper to the bottom chord of each truss. I imagine most of the seams sideways where stapled will ...
1
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1answer
59 views

Vapor barrier problems

Update: added some additional details below based on comments. I have a basement bathroom that I am currently working on. I've framed and installed rough plumbing. I have some vapor barrier problems ...
0
votes
1answer
21 views

Vapour barrier for basement garage ceiling

To make the floor of a bedroom above a garage warmer it is desireable to insulate the garage ceiling. Does a vapour barrier go up in the joists against the floor above since the house would be ...
0
votes
1answer
54 views

Attic insulation: Giving unfaced insulation a face

I just moved into a small 1950s home. The previous owner had purchased tons of unfaced fiberglass batts and they are still in their bags, piled up in the attic. So I'm going to clean up the little bit ...
3
votes
3answers
362 views

Install plastic between drywall ceilings and rafters?

We are building a new house and are getting ready to install the drywall on the ceilings. We have installed a 6 mil plastic barrier on the underside of the rafters to act as an air & moisture ...
2
votes
1answer
84 views

Insulating between boiler room and bathroom

Part of my bathroom is directly above the boiler room. The boiler room is only accessible via an external door and is well ventilated with wall and door vents, so I consider it more like an outhouse ...
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0answers
58 views

Insulation and Vapor/Moisture concerns with a wood ceiling.

I have already removed the drywall in the ceiling so the rafters and bat insulation is currently visible. I plan to be adding plywood to the ceiling and then installing 1x6 boards on top of the ...
1
vote
0answers
26 views

Proper method to seal a heated crawl space

I have a heated crawlspace with a dirt floor. There are no vents, it is fully connected to the house, and currently has a pool liner and vapour barrier stretched over it, but it is not sealed. There ...
0
votes
0answers
23 views

Insulating attic - vapour barrier question

My girlfriend has her parents 61-year-old home in St. John's NL and it has an attic with poor ventilation and unfastened R-12 kraft-faced (and facing up) fibreglass laying on the original drywall. I ...
1
vote
2answers
56 views

Vapor barrier behind existing backer board [closed]

We are remodeling our master shower. We currently have a plastic tray-like/shower pan with tile on the walls. There is currently green board on the walls. When we place the vapor barrier on our new ...
0
votes
0answers
68 views

Super-Insulating a Crawlspace

I am getting ready to have a contractor insulate my crawlspace. The exterior facing walls of my crawlspace are about 2" above grade, with the remaining 2 ft 6 in - 2 ft 10 in below grade. One of the ...
0
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0answers
35 views

Vapor barrier on seasonal cottage

I am renovating a seasonal cottage in Michigan built in 1930. The layers of the exterior walls consist of new drywall on the 2X4 existing studs, behind the drywall new fiberglass insulation with a ...
1
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0answers
95 views

Garage Wall Question- Insulation and vapour barrier?

We live in Vancouver, BC, Canada. We are redoing the wall that separates our house from the garage. The wall is built with 2 by 6's and has been insulated with Roxul R20 thermal batt insulation. On ...
0
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0answers
51 views

Encapsulate the crawlspace?

I live in a coastal community in Northern CA. My house has a crawlspace and sits on clay soils which keeps very wet on its own. To add to it, the air is extremely wet (not Southern, hot-type humidity, ...
0
votes
0answers
52 views

Where and how much vapor barrier

I will be gutting my bathroom to remodel and was wondering if I should install a vapor barrier on all of the walls and ceiling or just the area in close proximity to the shower. Bathroom dimensions ...
1
vote
0answers
61 views

Suggestions/advice on vapor barrier product to use?

In the basement of my house (built in 1900) in NE Ohio...Half of the basement floor is finished, the other half is dirt floor covered by a few inches of crushed stone gravel. I had a mold issue, so ...
0
votes
0answers
37 views

How do I create a vapor barrier on basement walls with a floating concrete floor?

I am finishing our basement (upstate NY), and was wondering how to create a vapor barrier on the concrete block basement walls with a floating concrete slab floor? The floor has a 2 inch gap on the ...
0
votes
1answer
167 views

Should I install a plastic vapor barrier below the insulation between my ceiling and attic floor?

I'm redoing the insulation in my attic the floor/ceiling cavity and then the ceiling of the attic. I have 2 rolls of plastic that is 15 ft by 150 ft just sitting around -- I've had it for years. Is it ...
0
votes
1answer
64 views

Is there something I can do after not putting a moisture barrier between grade and concrete of a garage?

I built a 3 car garage 7 years ago. I didn't know at the time that I needed a vapor barrier between grade and concrete; Is there something I can do to keep the floor from being wet on a regular ...
0
votes
0answers
66 views

vapor barrier between sub floor?

A friend and myself are building a cabin in southern california. It doesn't snow often where it is located. The cabin itself is setup on a post foundation and we are almost finished with the ...
0
votes
3answers
464 views

Is it okay to not have a vapor barrier in lightweight tiny house type construction?

So, I have a bit of an odd project. It is a bit outside of the box, and I'm looking for alternative approaches that stick with the theme (if the plan outlined below doesn't work, that is). ...
3
votes
1answer
129 views

Wisconsin Basement Finishing questions

Last year I decided to let my brother-in-law finish my basement. After he finished the framing he moved away. Now I have wood framing complete and nothing else. He claimed he knew what he was ...
0
votes
1answer
151 views

Is it normal to notice underneath the plastic barrier in crawlspace drops of water?

A radon barrier was placed using 6mil polyethylene sheets and sealed with silicon in at the seams. However, I do notice in certain spots a couple of drops of water underneath the sheet. Is this ...
0
votes
2answers
92 views

polystyrene insulation over dryloc basement walls

I am a DIY beginner. If I am installing polystyrene over drylocked basement walls, do I need a vapor barrier? Do I put the studs on top of the polystyrene? So, from exterior to interior it would ...
1
vote
4answers
815 views

Best way to air seal, vapor seal, and insulate exterior wall in old house?

I have a 90-year old house in Seattle. Exterior walls are constructed as follows: lath and plaster, uninsulated 2x4 stud bays, plank sheathing, cedar clapboard, 1" foil-faced styrofoam, vinyl siding. ...
0
votes
1answer
279 views

Can I use a 5 mil blue tarp as a moisture barrier over a dirt floor in a crawl space instead of poly sheeting?

Can I use a 5 mil blue tarp as a moisture barrier over a dirt floor in a crawl space instead of poly sheeting?
5
votes
3answers
2k views

What is correct vapour barrier method for bathroom ceiling in a bungalow in Canada

I am in the middle of a complete main floor bathroom gutting and re-finish job in my house in CANADA.. and WINTER IS COMING!!!! THE BACKGROUND (pics below): My bathroom is 5'x 13' in a bungalow with ...
1
vote
0answers
272 views

How should I seal and insulate a crawlspace to mitigate radon and allow for storage in the space?

Background: I recently bought a house built in 1996. It has a 1480sq ft (approx) living area, which is the same as the crawl space size. The location is in the Kansas City metro area. The yard is ...
1
vote
3answers
157 views

How should I insulate the ceiling between floors in a ski cabin?

I have a small ski cabin in upstate New York (cold climate) that we only visit on weekends. It is heated by a wood stove. During winter we had many problems with bursting water pipes so they are now ...
2
votes
2answers
10k views

Do I need a vapor barrier in an exterior basement wall if I use purple drywall?

I purchased some purple drywall (mold and moisture resistant)for installing in a finished basement bedroom. One wall is an exterior wall. Do I need to install a vapor barrier between the drywall and ...
0
votes
0answers
183 views

Can I use a vapor barrier paint instead of polyethylene sheets to encapsulate my crawlspace?

I was looking into "encapsulating" my crawlspace by some manner or other. From what I can tell the way to do this involves (primary) some thick poly (.15 or more) along the the soil and up the ...
1
vote
1answer
1k views

Do I need vapor barrier to insulate a cinder block garage?

Similar to How to properly insulate a garage? and Do I need a vapor barrier between the insulation and finish wall in a new garage? both of which do not have answers pertitent to my one particular ...
3
votes
5answers
12k views

Should I put vapor barrier only on exterior wall of a bathroom?

I've been searching around the site and haven't found an answer for my question on where to place a vapor barrier so I'm hoping to get a little more clarity here. Basically I'm in the home stretch of ...
2
votes
2answers
788 views

Vapor and moisture barrier for “above ground” basement

I'm finishing the basement of my home in New Jersey, and I'm a bit confused about the general guidance for basement moisture and vapor barriers. My "basement" is built from concrete block. However, ...
1
vote
1answer
5k views

What kind of insulation should we put under new tin roof?

We live in an old long leaf pine farmhouse that has no insulation in it. We are going to be putting a new metal roof on the house. The attic of the house was made into living space and so there is ...
1
vote
1answer
160 views

Vapor barrier for room next to garage?

I'm finishing a room that was built between the house and detached garage. I know I need to put 5/8" drywall for fire protection after insulating the wall. Do I also need vapor barrier? If so, how do ...
0
votes
0answers
86 views

Replacing old windows - how to make vapor barrier?

I'm replacing a couple windows in an 80 year old house. Not surprisingly, there is no house wrap or any kind of vapor barrier. It's 2x4 studs with 1/2" tongue and groove wood siding on the inside, ...
0
votes
1answer
90 views

how do I build a 7 to 9 inch high water dam?

how do I build a 7 to 9 inch high water dam? In wet weather, water gets into my house. I need to create a berm of earth that will be grass covered, and it should also have a water barrier to keep the ...
1
vote
2answers
528 views

What are my insulation options around a shower?

I'm remodeling my bathroom and shower and I'll be replacing the insulation on the external wall. This wall is the "back" of the shower (opposite from where the water supply lines are). With this in ...
4
votes
6answers
34k views

What are the pros and cons of adding a vapor barrier behind shower backer board?

After much research, I have a lot of conflicting advise about the need to add a vapor barrier before installing the backer (hardy / cement) board for my bathroom shower. The "expert" at Home Depot, ...
1
vote
1answer
2k views

What are my vapor-barrier options under Hardie siding?

I'm currently in the process of replacing all the siding on my 1940s home. It was originally wood dutch-lap and that was covered with felt paper and asbestos siding. I'm taking all the siding off, ...
2
votes
1answer
365 views

Where to locate moisture barrier in engineered hardwood floor sandwich placed over insulation board?

I'm planning to install an engineered hardwood floor on a concrete slab that is very very cold. The climate is northern New Mexico. The slab perimeter is not insulated, and doing so is ...
0
votes
1answer
622 views

Crawlspace Vapor Barrier Overkill?

I am about to install a vapor barrier in my damp Atlanta, Georgia area rental home. I plan to seal it about 3 feet up the poured concrete walls and overlap and seal all seams essentially creating an ...