For questions generally relating to habitable spaces in a home below ground level, and to foundation types that include a space of this type.

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3
votes
4answers
7k views

What is the best flooring for my basement?

I live in Michigan, where humidity is fairly high. I have a 70 pint dehumidifier that works great. I also have a sump pump and water powered backup sump pump. I am looking to floor my basement ...
1
vote
1answer
54 views

What should I look for in a battery backup sump pump?

I've got a pretty basic 1/3 hp sump pump that does the job quite well. However, i'm concerned about losing power and just the wrong time. Or worse the pump goes bad! What sort of features do you look ...
4
votes
1answer
2k views

How do I install carpet tiles in a below grade room?

A few years ago, I saw an advertisement for carpet tiles that had a jagged edge so there would be less movement in the interlock between tiles, and prevented the need for glue. (would like to find ...
1
vote
0answers
36 views

What are the considerations for crawlspace encapsulation barriers / humidity control?

I live in a house that's half slab, half crawlspace. The crawl is half basement. Typical crawlspace/basement humidity readings are: 80% RH @ 67°F 85% RH @ 68°F 78% RH @ 67°F Where in the ...
1
vote
0answers
120 views

Connecting a sump pump to sewer

I'm attempting to install a new sump pump in my basement after having a few minor flooding incidents and addressing as much of the external causes as possible (gutters, etc). The pump is only used for ...
8
votes
3answers
19k views

Should we install carpet before the baseboard and door casings?

We just had a carpet layer come in for measurements and a quote. We've not put in the baseboard or door casings yet, but the carpet layer has suggested that this will make things easier. Is this true ...
0
votes
0answers
37 views

Which should I do first? replacing furnace or resurfacing concrete floor?

I'm going to get two things done in my basement soon (by hiring professionals), but I'm wondering what the right order of operations is. One task is to replace the gas furnace that sits near the ...
18
votes
1answer
10k views

Humidity Levels

What is a healthy and safe humidity level that I should try to keep my house at?
7
votes
4answers
3k views

How should I insulate my basement?

My basement is CMU blocks and concrete floor. I had water issues, so I waterproofed it with an interior french drain, drainboard at the edge and a sump pump. This wouldn't take care of dampness so I ...
1
vote
4answers
652 views

How realistic is lowering a concrete floor?

So first off, I love basements, its almost like a fetish. Ook.. so this guy is selling a basement in his building and its perfect(got good water, electricity, comms, location and cheap!) except for ...
1
vote
0answers
85 views

frame soffit against foundation wall

I'm framing my basement and I have a duct that runs along the foundation wall. There's a little over a 1" gap between the duct and the wall, so I was planning on putting up XPS along the wall and then ...
0
votes
1answer
55 views

Glass deck above basement addition [closed]

We're planning to expand our basement underneath our deck and would ideally like to cover this section of the deck in glass as in this photo. (Posted: Wear skirts at your own risk!) Our architect ...
0
votes
1answer
44 views

Sewer drain cap replacement options

I have sewer cap that has lost its threads. I am wondering what options I have to replace/fix that does not involving tearing up the cement floor. Are compression fittings a good option?
2
votes
4answers
233 views

How do I mount this pullup bar?

I bought this pull up bar that is designed to go into studs that are 16" apart Ultimate Body Press My basement walls are only framed out so I can see all of the studs. I started to mount it and ...
4
votes
6answers
416 views

Would insulating a basement prevent it from passively cooling the house in the summer?

I have an unfinished basement in Upstate NY in a large old house that helps in keeping the house cool in the summer. Would insulating it limit the cooling effect in summer?
0
votes
2answers
81 views

Minimizing wall thickness for basement drywall?

I'm trying to optimize acoustics of my future home theater by maximizing dimensions to minimize standing wave problems. I would like to minimize the thickness of a finished wall consisting of drywall ...
3
votes
2answers
303 views

Must NM cables around panels in unfinished basements be protected?

I'm thinking about installing a new circuit. The panel is on the wall in an unfinished basement. Three questions: Is the new NM cable going down to and around the panel considered to be "subject to ...
0
votes
1answer
73 views

Can I support a fiberglass tub with a layer of 1" thick foam board between a concrete subfloor and mortar base?

I'm trying to maximize the headroom in my basement shower. I originally planned on placing the tub on top of the subfloor and sleepers that make up the rest of the floor, but then I realized I can add ...
18
votes
5answers
147k views

What humidity should I set my dehumidifier to?

I just bought a 50 pint dehumidifier for my basement. What humidity level should I aim for? This time of year the outside humidity is very high (over 80%) and we do not have central air. Right now ...
1
vote
1answer
54 views

Do I need to close the windows and doors in the entire house when doing a radon test?

I'm trying to perform a home radon test, the first step in the instructions for the Pro-Lab Radon Gas Detector Kit read that I need to close all the windows and doors for 12 hours before hand. Do I ...
0
votes
1answer
64 views

Removing Steel Basement Windows

My basement has the original steel (I think) framed windows in place from 1962, when it was built. I've removed windows in block before, at my previous house, but this one does not seem as clear. As ...
4
votes
3answers
298 views

Is it okay to protect NM Cable in an unfinished basement with ENT?

Adding a 20 amp subcircuit (120V) to furnace room to turn it into a workshop. Initially it will have one duplex and 2 fourplex receptacles, the fourplex receptacles will be on cement walls, the duplex ...
2
votes
2answers
127 views

How can I insulate behind pipes that are close to a foundation wall?

Reading around, it seems like most people suggest to put up XPS insulation when finishing a basement. That's great and all, but how do you put 2" of rigid foam behind pipes that already exist in the ...
0
votes
1answer
126 views

How do I frame this oddly spaced rough in

It's been a long time since I posted about this stupid rough in (dang kids), but I'm attempting to get back on it. The spacing for these pipes are driving me crazy. For a quick reference, the ...
2
votes
1answer
239 views

Subfloors and stairs

It seems to me that many people put subfloors in their basements (and other floors), but what do they do when it comes to the existing stairs? I'm code says that you can't have more than 3/8" ...
0
votes
3answers
1k views

How do you install a solar light tube through an outside wall into the basement?

In renovating a basement, is it possible to install a solar-light-tube through the wall to the outside and still gather light?
1
vote
3answers
179 views

Gutted a basement and found a window, what should I do?

I recently gutted my basement in an early 1900s home that was finished in the mid-80s, and discovered a window! This window is directly under my front door, hidden by a deck that I've never really ...
1
vote
1answer
62 views

Quantitative measurement for sound dampening methods

I'm planning to finish off my basement. Which type of basement ceiling insulation is most effective at reducing sound transfer between levels, blown in cellulose or rock wool batts and how much more ...
1
vote
0answers
53 views

Lowering the basement, water table 2 metre deep

My house is constructed on the side of a slope where the top of the slope is built the road. I'd like to dig out the basement which is not high enough to stand in mostly, and is just clay. As part ...
0
votes
0answers
104 views

Soundproofing existing ducts/vents in basement (drywall is already up)

So long story short I recently converted a basement into an apartment and plan on living down there. I insulated in between the joists and double drywalled everything and that is all ok. The only ...
1
vote
0answers
81 views

How can I insulate a combo basement/crawspace?

I live in Louisville, Kentucky, so we have relatively cold winters (nighttime lows consistently below freezing) and relatively hot, humid summers (daytime highs consistently in the muggy 90s). My ...
0
votes
1answer
80 views

Holes in basement floor

We have a couple holes in our basement floor that I assume drain to the sewer, but they're not covered. A guy installing our water heater recommended covering them so we don't get sewer gas or ...
3
votes
3answers
2k views

Basement subfloor, how exactly should I do it?

I am finishing a basement with my father and want to put in a subfloor. I know if there was ever enough water I would probably have to replace the floor anyways but want to give myself a couple inches ...
0
votes
2answers
76 views

Basement Subfloor for Moisture Problems

I have a slight moisture problem in the basement. During really torrential rainstorms of 5+ inches of rain, sometimes water seeps up though the concrete floor in the basement. I'm looking at ...
0
votes
3answers
215 views

Can I break up the floor of a raised floor basement bathroom without damaging the plumbing?

I have an interesting remodel project. I have an existing basement bathroom - which has a raised concrete floor. The toilet sits on the slab. I am remodeling this to create a bigger bathroom for ...
2
votes
2answers
137 views

How can I meet the height requirements for a door in a basement with a low ceiling?

To meet code we need a minimum 6'6" clearance through all doors. The ceiling height in most of the basement is 6'8", but the clearance through the exterior door is much less than that. On the inside ...
0
votes
1answer
94 views

basement bathroom flooring options in old 1929 house

I have an old house built in 1929 in Minneapolis, Mn. I need to replace water damaged rotted basement bathroom floor(toilet and shower leak another story). Current floor is 2" by 4" sleepers set on ...
4
votes
3answers
8k views

What is the best way to fill a hole in a concrete basement floor?

My basement floor has a hole cut where the water line enters the house. This hole is around 2ft square, and digging down a little I hit dirt and small roots. I'd like to seal this hole as I believe it ...
1
vote
1answer
148 views

How can I stop this drain pipe from backing up?

In my basement laundry room is (to my knowledge) the only drain pipe in the whole basement, which hooks into the end of the main line as it exits the house and heads to the septic tank. When we moved ...
2
votes
1answer
110 views

How can I reduce the humidity level in my basement?

I have an unfinished basement in my 1040 square foot ranch house. I just bought an energy star 30 pint dehumidifier to replace an old one that came with the house 1 year ago (I set it on the "driest" ...
4
votes
2answers
274 views

How much water is too much water underneath the basement concrete?

We are getting ready to install a new shower in our basement. When we had our house built about 8 yrs ago we asked to have a shower & toilet drains roughed in. I cut off the plastic cover for ...
4
votes
3answers
190 views

What happens if XPS is an inch away from basement walls?

I live in Maine and am planning to insulate my basement. It has fairly smooth poured concrete walls. I've read online that spray foam is one option, and 2" of XPS directly against the wall is ...
0
votes
1answer
129 views

How can I put a drain hose through a basement wall or window?

I am putting a dehumidifier in our basement, but need to drain it to the outside.
0
votes
0answers
34 views

Radon sealant on the basement floor, when does it need replacing?

Our house is 30 years old, when we bought last year the Radon mitigation system was 12/15 years old no one really knew. When cleaning the basement it got me thinking how long these things last? We ...
0
votes
0answers
33 views

Drywall Type for Conditioned Basement

In my conditioned basement, should mold and moisture resistant drywall be used? I've read varying accounts, including use it everywhere, use it on the walls (but not ceiling), use it on the bottom row ...
0
votes
0answers
82 views

Insulation of Basement Block Wall and Framing

In finishing part of my basement, we've gone ahead and installed 3/4" rigid insulation (R-3.8 IIRC), and then 2x4 framing against the rigid insulation. Then, the small gaps with between the 2x4 ...
0
votes
0answers
268 views

Leveling basement floor while keeping it sloping to the drain?

I am having similar problem with the basement slope being exceptionally steep around the floor drain (similar to this: How do I level a basement floor but not the slab underneath?). The discussion ...
3
votes
3answers
494 views

What type of flooring can be used on a concrete slab?

I have a split ranch house in NY and the downstairs hallway and half bath / laundry room currently has vinyl tile on a concrete slab. I would like to cover the vinyl tile with a new floor. What is ...
2
votes
1answer
127 views

Is rigid foam on rim board in basement worth doing if walls aren't insulated?

We bought an older home that we use more as an office. The basement is totally uninsulated including the rim joists. Last winter, it got really cold down there to the point that the floors upstairs ...
1
vote
1answer
148 views

How to maintain temp for always cold office in finished Basement

I work out of my home in an office in our finished basement. The room is always cold whether it's the middle of winter or the middle of summer. I often run a cheap space heater (especially) in the ...