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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2answers
87 views

Can you lay ceramic/porcelain tile over existing mastic without grinding the floor?

We had a basement flood, and consequently had to rip out the vinyl floor tiles in our basement. The tiles were not asbestos (we had them tested). But after the tiles came up we discovered that they ...
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2answers
43 views

Where do I need to drain the footing drain when I waterproof a basement from outside

I am planning to waterproof a basement. (please see the attached picture). I would like to know if the component labeled collector on my attached picture is needed. Since my lot is virtually flat I am ...
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2answers
61 views

Damp smell in basement

I have a gap between outside wall and pavement. Could this be the reason for damp smell in the cellar? If I poured bitumin down said gap, would this help prevent the dampness?
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2answers
70 views

Suggestions on finishing a concrete vault

I have a newer home that the builder put a concrete vault in. It is basically the porch that was dug out fully to make a room under it with a steel security door. The concrete porch is the ceiling. ...
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1answer
70 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, ...
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1answer
145 views

Should I install insulation between the rim joist and the top of foam insulation?

I am in the beginning phases of finishing my basement, newer house with poured cement foundation and engineered I-beam floor joists. No moisture issues in the basement. Rim joist currently has a batt ...
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1answer
41 views

Cutting back a carpet edge.

I have a tile entrance at my walk in basement door that I want to make larger. If I cut back the carpet a couple feet will I have to restretch the carpet?
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0answers
31 views

What can I do about a basement window well that is filling with water?

My house was built in the 1950s and I have a basement window well that was filling up with water after a hard rain. I have covers however the water would come up. After much reading online that there ...
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0answers
60 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 ...
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0answers
23 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 ...
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0answers
46 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 ...
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0answers
44 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 ...
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0answers
61 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 ...
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0answers
45 views

Basement subfloor using p.t. sleepers and plywood?

I am a contractor in the Boston area. I need to install a subfloor over a concrete basement floor. I am thinking of using p.t. sleepers and 3/4" plywood. Is this an efficient and cost effective method ...
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0answers
186 views

Do I use a wooden frame for a basement hopper window?

I am replacing a basement hopper window. The previous owners replaced an old hopper window with a too-small piece of storm window and piece of plywood: I want to replace this with a correctly-fit ...
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0answers
361 views

What kind of subfloor do most people use these days?

I've been reading tons on how to do a subfloor for my basement and I don't seem to be getting any closer to an answer. So far it looks like there are 4 ways to do this: (I'm stealing a good part of ...
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0answers
133 views

Click vinyl on basement floor with drain

I have a basement with a grade leading to a drain in the floor. The previous owner added a wall over the drain and put self-levelling cement on one side of the wall, over top of existing linoleum ...
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0answers
153 views

Washer tripping gfi outlet

I've been living in my house for almost two years and my washer and dryer have been working fine. I have a maytag Neptune washer and dryer, just the other day I took a packet of tide washing machine ...
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0answers
354 views

How can I stop water from coming up through the floor?

I have a house that is on a high water table, and water is coming up through the floor. The property was excavated around the perimeter a couple of years ago and installed a new Big "O". Drycore was ...
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0answers
31 views

Should I add an air return in my basement and seal old vents?

My question is basically a variation of two prior questions: "How do I close and seal an old external vent" and "Should I add an air return in a finished basement." My house has a bottom level that ...
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0answers
22 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 ...
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0answers
52 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 ...
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0answers
33 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 ...
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0answers
29 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 ...
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0answers
67 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 ...
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0answers
86 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 ...
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0answers
38 views

What would cause mortar to have a patchy finish?

I started a re-pointing project in my basement, but it was way more work than I had anticipated, so I haven't continued in about six months. However, now that i'm looking at mortar I originally ...
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0answers
208 views

What should I do about the insulation in my basement?

So in my basement I have insulation that was put up by the builder. My first question is what is this type of insulation called? The second question I have pertains to finishing the basement. I ...