Questions tagged [crawlspace]

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19 views

insulate the inside of a crawl space with rubble walls

how to insulate the inside of a crawl space with rubble walls? The exterior is already insulated to limit humidity.
2 votes
2 answers
62 views

How can I repair a loose crawlspace support post?

We just had a crawlspace inspection (unrelated to this topic) and the inspector found one of our support posts was loose enough to be wiggled back and forth. It wasn’t quite touching the concrete pier....
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1 answer
69 views

Insulating under the staircase from the crawl space - faced fiberglass insulation ok?

Our house is built on a slope, so the staircase to the bottom floor is right above the crawl space (vented; climate zone 3). The staircase is carpeted, and there's no insulation underneath. I can ...
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Is this mold growing behind duct tape that's holding vapor barrier to concrete foundation?

We put a vapor barrier down in our crawl space. Some parts of the perimeter were not completely sealed, so a few months ago, I used a clear duct tape to attach the vapor barrier to the concrete ...
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2 votes
0 answers
75 views

Crawl Space Encapsulation: How to deal with the "Chamber of Secrets?"

I have a south Louisiana home built in the 1950's with a vented crawl space. In the 70's, a den was added with a slab on grade foundation. In this addition, the back porch was converted into a ...
0 votes
1 answer
71 views

Is it possible to have an air leak from the ductwork?

I live in a townhome condo, occupying the third and fourth floor of the building. The indoor AC unit is on my second floor and the ductwork is in the space between the ceiling of the first floor and ...
-1 votes
1 answer
45 views

Crawlspace vapor barrier

I had vapor barrier installed in my crawlspace and it does not cover the perimeter drain. It only goes to the edge of the drain, about 8 inches away from the wall. Should it cover the drain and go up ...
1 vote
2 answers
49 views

Airflow into encapsulated crawlspace when connected to a basement

I have two crawlspaces, separate from one another, each with access from the basement and also a grate on the exterior, allowing airflow. If I take steps to encapsulate them, should I block off the ...
1 vote
1 answer
115 views

Help me enclose my crawl space

I have a home in the Northeastern USA (Maine). The frost line is roughly 5 feet. My home appears to be built using posts and piers. I haven't had a chance to start removing things to get a better view ...
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1 vote
1 answer
108 views

mitigating radon in basement with joist & plywood floor

I bought a vacation home in the mountains and have found that it has a dangerous radon level (7.4pCi/L). The house has an 800 sq-ft unfinished basement, including a rough plywood floor over treated ...
1 vote
0 answers
54 views

Dripping pipe in crawlspace - how much of an emergency?

I disconnected a refrigerator supply line (to the ice maker). The original tube was made of copper and I plan to replace it with braided stainless steel. However, I'm having some painting done this ...
1 vote
1 answer
79 views

Fire Sealing Holes to Crawl Space?

I live in the United States in the State of Idaho. I have done a DIY project some time ago and my research then (Fall 2016) indicated that holes going from the first floor directly into the crawl ...
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1 answer
111 views

fixing crawlspace insulation, can/should we use r-30 batting meant for attics?

Our kitchen floors (hardwood) are freezing, and we found that crawl space insulation below those floors appear to be poorly installed. First, the insulation appears to be installed upside down, with ...
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3 votes
1 answer
304 views

Can a doorbell transformer be mounted to a metal junction box which is also being used as a light?

I was recently in my Crawlspace installing a doorbell transformer when I got the idea of potentially reusing an existing junction box. The only problem is the junction box currently has a lamp holder ...
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1 vote
0 answers
121 views

How to route/replace HVAC plenum/trunk lines through a poorly designed foundation wall hole with a gas pipe in the way on the other side

New homeowner of a 1959 constructed house. Surprisingly, only 4 owners (including myself), with the last 2 each having it for about 20 yrs and each seemed to be DIYers - not necessarily choices I ...
0 votes
2 answers
858 views

Recommendation for wiring path for bathroom bidet outlet

first time doing a more difficult outlet install (not just across a wall). Looking to install an outlet for a bidet in my 1st floor bathroom. I need to run a wire from the outlet above the sink to ...
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2 answers
198 views

Trying to get advice on how to fix missing cinder blocks in my crawl space

Just had my crawl space inspected and it’s missing some blocks down there and the insulation needs to be replaced, it’s outside under my porch and it’s no mold or water down there but I’m looking to ...
1 vote
1 answer
300 views

Running EV Charger Wiring through Crawlspace

I'm looking to purchase and install a Tesla home charger since I'm tired of charging on a 120V outlet. I've been reading a bit and think I have a plan, but since this would be my first time doing any ...
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1 vote
3 answers
173 views

Fix Hole in Foundation

I have a hole in my foundation that is letting a ton of water right into the crawlspace. I think it formed over several years from a gutter downspout that wasn't functioning properly (I plan on ...
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1 answer
84 views

Why is there crawl space water in a small channel and what is the best way to fix this?

What is the best way to go about fixing this water in the crawlspace? If water is coming in through the side is that normal? Or is there possibly a crack in the concrete wall and is allowing water ...
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1 vote
0 answers
102 views

1/2” Vertical Hole in Floor Joist - What to do?

First post here, hoping to get some help. I was recently trying to run a coax cable from my crawl space into my home office (there was an existing coax drop, but the cable seems to terminate somewhere ...
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2 votes
1 answer
181 views

What's this wire coming out of my crawl space?

I have an unknown wire coming from the interior of my crawlspace to outside, and I'm trying to figure out what it is. I'd like to remove it possible so that the crawlspace door will shut nicely. I ...
3 votes
2 answers
342 views

Is there a reason to replace 50 year old metal ducting in the crawlspace with modern insulated flexible ducting?

My concern is heat loss in the chilly crawlspace. No AC here, only forced air gas furnace. The existing metal ducting in the crawl space is over 50 years but is intact. There is a very thin layer of ...
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2 votes
1 answer
334 views

Seeking suggestions for working around a crawl space vent when building a deck

Our home is a 1950s split level in IL. Our split level deck's step is shorter than code, everyone trips on it, and the homeowner is legally blind. We need to level the deck for safety. Raising the ...
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0 answers
33 views

Should I be installing a dehumidifier inlet with the air supply or just in the crawlspace?

Built our home five years ago and our crawlspace is 2300 sq ft. For awhile ran a residential dehumidifier till it went out. I do understand that placing this in the crawlspace wasnt the best ideal ...
1 vote
0 answers
53 views

Preparing crawl space for storage

I have a large crawl space under my first floor that I can access from my basement. The ceiling of the crawlspace is insulated with fiberglass (my library/den is above it on the first floor). The ...
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1 vote
2 answers
124 views

Why doesn't my condensate pump drain very well?

I'm working on a crawl space encapsulation. One of the last steps for me to do is to setup a dehumidifier. I bought a Santa Fe Compact 70 and a condensate pump to go with it. I'm discharging it about ...
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3 votes
0 answers
199 views

Drilling holes in crawl space block foundation

I did a crawl space encapsulation myself. I used foundation pins to secure the vapor barrier to the walls every 16". Unfortunately, my walls were so wet I couldn't use a butyl tape like the ...
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2 votes
2 answers
162 views

How to Replace Wood Support in Crawlspace?

On an inspection report, there is a stack of wood in the crawlspace acting as a support post. I'm wondering how and what these should be replaced with? Googling steel shims, I see it's just a sheet ...
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2 answers
55 views

how should I determine the requirements for my specific crawlspace encapsulation?

I live in the San Francisco Bay Area. Low humidity and mild climate year round. I don't have any problem with mold or humidity in my vented crawlspace, but it is musty and I want to prevent that musty ...
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2 votes
1 answer
1k views

HVAC Condensate draining into crawlspace

I recently purchased a home that had been remodeled by the previous owners. They installed a new furnace and A/C unit in the basement crawlspace. Initially, the crawlspace was dry and everything ...
-1 votes
1 answer
138 views

Support for crawlspace beams

Bought my house in 2018. The beam in crawlspace is supported with some rusted plates on top of concrete, possibly to fix sagging over the years. My floor feels bouncy and I believe I should have ...
2 votes
2 answers
2k views

Best way to repair the crawl space vent

So I had a few questions as far as stucco vents go. Here is an image of what we are talking about: What would be the best way to repair this hole? Just some wire mesh over it? Some follow on ...
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1 vote
1 answer
323 views

Door sticks and drywall cracks, ledger board not level?

I noticed some drywall cracking in the corner above the door frame on both sides of the door and that door is unable to fully close, a few weeks ago all was fine, crack was there but door could close ...
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0 votes
2 answers
613 views

Best/easiest way to install access door to dead space in house

I have a roughly 6'x6' dead space on my second floor that was previously used to run exhaust pipes for my gas water heater and gas heater on the ground floor. This dead space currently has no access, ...
0 votes
0 answers
101 views

Sanding Down Portion of Flagstone Patio

Good morning - I'm installing a new door to my crawl space that provides a tighter seal. The older door left a small gap underneath the door. The crawl space door is right off of my flagstone patio. ...
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1 vote
3 answers
127 views

Should the foundation wall be insulated when encapsulating a crawl space, or not?

I've seen conflicting info on this. Some sources say that you shouldn't insulate your foundation wall because moisture can get trapped between the insulation and the wall. Others say that the ...
3 votes
1 answer
225 views

Why can't an encapsulated and dehumidified crawl space have vents sealed off?

I found SECTION R408.3 of the International Residential Code which says that unvented crawl spaces are only allowed if one of the following is true: There is exhaust ventilation fan running ...
0 votes
5 answers
169 views

What kind of flooring for crawl space that is easy to move on?

what kind of flooring/mat/pad may be used on a section of the floor as a base for storing items and is also slippery enough to be able to glide/push/pull items on top of it? Edits: Crawl space floor ...
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1 vote
1 answer
2k views

How low should I drill holes in my sump pump basin? Should I drill them at the bottom?

I'm encapsulating my crawl space and as a part of this I'm installing a sump pump with a perimeter drain around the inside of the crawl space that leads to the sump pump basin. I installed the sump ...
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1 vote
0 answers
148 views

is there anything wrong with using plastic sheeting under joists in a dirt crawlspace area?

background info: old farm house crawlspace with exterior perimeter walls made from boulders and cement skimmed to create a fall surface. joists under the main living space have batting type fiberglass ...
1 vote
2 answers
3k views

Sump pump horizontal distance - Why do 90 deg angles put more load on the pump after a vertical drop?

I'm installing a new sump pump basin in a new location in my crawl space. I currently have a Zoeller M53 1/3 HP. The discharge pipe will come out the back of my house, but I want to bring the ...
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0 votes
1 answer
916 views

Can only use small sump pump basin in crawl space, what can I do to prevent short cycling?

My crawl space access is only 19" in height. This severely limits the sump basins I can find. Every basin I see that say that they are 18" diameter are referring to only the inside diameter. ...
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1 vote
1 answer
47 views

Sewer Line Opening - Makeshift Vent or Rodents?

In the crawl space beneath my house, the sewer line has a branch that runs right to the crawl space entry/vent. The end cap has a jagged hole: Not sure if it's been that way since I bought it (...
1 vote
1 answer
457 views

new crawl space access?

My homes previous owner had built an addition to the home which then made the crawl space access inside the home. I wanted to seal that off and then create a new exterior crawl space access. But I ...
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1 vote
1 answer
45 views

Framing in a home's crawlspace

Looking to take some time in the new year to frame out an area of my "crawlspace." It has about 7.5' clearance in height, so it'll be tight... but my goal is to make a workbench area for ...
3 votes
2 answers
721 views

Is this open supply duct in my vented crawl space necessary?

New (first-time) home owner here (4 months in). I recently discovered what at first seemed like an un/disconnected supply-side duct in our vented (open) crawl space. Photo attached. After several ...
1 vote
1 answer
85 views

Should cracks and water in the crawl space concern me when buying a house? [duplicate]

I am looking at a house that with a crawl space (see image). The crawl space has the full height of a basement, windows and a door leading outside in the back. It has French Drains along the downhill ...
0 votes
2 answers
85 views

Are water and vertical cracks normal for full height crawl space? [closed]

I am thinking about purchasing a home that is set on top of a crawl space (see image). The crawl space has the full height of a basement, windows and a door leading outside in the back. It has French ...
1 vote
0 answers
80 views

Replacing a full height crawl space with basement

I am thinking about purchasing a home that is set on top of a crawl space (see image). The crawl space has the full height of a basement, windows and a door leading outside in the back. It has French ...

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