Questions tagged [crawlspace]

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91 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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88 views

Can tankless water heaters be mounted to the underside of joists in a crawlspace?

My single-story 1100 sqft home (1 bathroom + laundry + kitchen) currently has a gas 40gal tank water heater. We're looking to renovate and remove the tank water heater. It would be replaced with ...
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64 views

Options for sealing off basement crawlspace

The "crawlspace" In the back left upper corner of my basement, a hole was made to enable the addition of a powder room on the main floor 15+ years ago. The basement walls are concrete and the hole ...
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0answers
968 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 ...
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25 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 ...
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2answers
77 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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3answers
120 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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0answers
61 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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42 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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0answers
49 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 ...
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0answers
68 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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0answers
47 views

How to insulate a crawl space without an access point

I have a cottage that has recently been completely renovated but later learnt that the floor was not insulated because there isn't an access panel. The cottage doesn't have a crawl space the area ...
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0answers
35 views

Vapor Barrier Plastic over upside down crawlspace Insulation

I bought a rambler built in 1972. Had guys replace the insulation. Inspector came and said they put it in upside down. It's a shallow crawlspace and would be a mess to tear off paper and hard to ...
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148 views

How to tie interior crawlspace drain to outside discharge pipe?

I am installing an interior perimeter drain in a damp outbuilding crawl space. In the "literature" (YouTube) this kind of drain is commonly described but always with a pumped discharge (basin, pump, 1 ...
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0answers
454 views

Is CSST piping and water piping in an inaccessible crawl space against code?

The CSST line that feeds our upstairs dryer with gas, the water pipes for the washing machine and some electrical wires run through an inaccessible crawlspace in the basement. When I went to turn the ...
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0answers
49 views

Do I need to vent a crawlspace?

We just completed a 20x20 great room addition on the side of our house with a 4 foot crawl space and poured concrete floor. There is a 4’ by 4’ cut through to access this crawl space from the existing ...
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0answers
1k views

Wires run through foundation vent screen

I need to replace the foundation vents in the house I recently bought. Unfortunately, AT&T, Time Warner, and others have run wires through one of the screens. I can't easily detach the wires to ...
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158 views

Sealing Off Gravity Pipe from Crawl Space

I currently have a 6" clay pipe for eliminating water from my crawlspace. The pipe exits my crawlspace about a foot from a corner wall, travels 15', and opens to air in a ditch (for now). It is ...
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0answers
134 views

Retrofit Foundation Posts/Beams

Bought a new (old) place and our inspector pointed out beams/posts that need framing/structural straps in the crawlspace. Ballpark estimate I got from a foundation contractor (site unseen) was a $3,...
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0answers
497 views

How do I support a deck-style floor in crawlspace?

This question is kind of a follow-up to the one asked here: how-should-i-add-flooring-in-my-crawl-space. My crawlspace is exactly as the one described. Basically my house is on a slope and have a ...
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0answers
57 views

What are some ways of controlling moisture in the crawlspace?

I live in Los Angeles. I have a vented crawlspace. The vents are about 6" x 15" or so. I have about one every 6' or so along the walls of the house. The floor of the crawlspace is dirt. I ...
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765 views

Crawlspace vent to garage usage?

I'm aware that my exterior crawlspace vents are to be opened when it goes over 70F outside and closed when it goes below 40F. However, what's the protocol for the crawlspace vent that goes into the ...
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0answers
72 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 ...
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0answers
342 views

How do I cleanly install speaker wire in a mobile home?

I have a decent amount of experience with all sorts of wiring in houses and offices. However all of my experience relates to buildings which have attics or dropped ceilings. I now am installing ...
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0answers
955 views

Minor Crawlspace Excavation: Need permits/structural engineer?

Background: First house, built in the late 60s, bought in October 2014. Original house has crawlspace with combination cinder/concrete foundation. Master bedroom is an addition to the house with a ...
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238 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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1answer
1k views

Moisture on crawlspace dirt/clay floor

Our house has a damp/musty smell to it when you first enter. Once you open a window/door the smell usually dissipates. In May (Chicago-land) the humidity in the house is about 30% upstairs and 40% in ...
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1answer
830 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 walls....
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4answers
695 views

Combatting moisture in crawl space after venting window is sprayed with insulation?

I had a crawl space (top left) in my house which had a 12"x6" venting window. There is a room above the crawl space, so I decided to spray the walls of the space with closed-cell foam insulation which ...
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73 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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26 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 ...
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50 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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2answers
1k 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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0answers
42 views

Adding new electrical outlet to formerly exterior wall, via crawlspace?

I have a formerly exterior wall that is now a wall to an enclosed sun porch. I want to add an electrical outlet there. The nearest outlet is on a 15 amp circuit and is located about 2 feet away, on a ...
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0answers
613 views

How to knock a hole through wall in crawl space

I need to gett access to the crawl space under the floors in every room in my house so that I can fit underfloor insulation. I'd like to fit insulation board as it seems to be the easiest to work ...
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0answers
40 views

How can I provide effective access to a subdivided space below a non-structural floor?

One problem faced when finished spaces are built atop concrete slab floors (whether slab-on-grade/slab-as-basement-floor, or a suspended reinforced concrete structural slab floor) is "where do the ...
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46 views

Vapor barrier for crawl space

We have a home at Oak Island NC. Our home was built in the 70's. There were no mildew or mold problem until we had plastic put in our crawl space. After a few years we now have the mold problem so we ...
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99 views

Can basement plumbing rough-in be moved to a new location in the crawl space?

Thanks for any help with these Plumbing 101 questions. Before talking with a pro about bathroom updates, I want a good grasp of what might be feasible. This bathroom has water and drain coming up ...
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72 views

How do do sump pump installation with trenching

Given the estimates i have been provided, I am going to try to do it myself. Here is what i came up with as the step by step method Dig a trench (4”x6”) along foundation. Dig a 24” sump pit for ...
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773 views

DIY Crawl Space Drainage and Encapsulation

Our house is in western Washington and during the winter we get a lot water in the crawl space. I'd like to tackle installing a drainage system – probably with a sump pump – and then encapsulate the ...
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49 views

why the crawlspace vent is closed?

I just move to a home and noticed the previous owner closed quite a few crawlspace vent. It seems to be intentional. I am wondering why he choose to close most of the vents and leave some of them ...
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0answers
244 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 ...
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1k views

Should I spread lime in my crawlspace before laying moisture barrier?

The crawlspace is currently just earth. I'm going to be raking it, laying moisture barrier and then taping to seal. Should I spread lime onto the earth before laying the barrier?
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1answer
55 views

Insulating/encapsulating crawlspace with HVAC ducting questions

In the PNW/Zone 4 climate. The house I am purchasing built in 1942 with an addition added had an inspection performed and it was noted that some of the fiberglass insulation installed under the ...
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1answer
93 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 ...
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1answer
991 views

Is a peltier-based dehumidifier a good choice to prevent condensation?

I have a non-heated, enclosed space (crawl space that does have a vapor barrier). During a limited number of days in the spring or fall, I get condensation on things that stay cold while the air ...