Questions tagged [crawlspace]

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3answers
99 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, ...
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0answers
36 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
54 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 ...
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1answer
120 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 ...
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1answer
57 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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1answer
187 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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0answers
38 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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1answer
164 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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1answer
122 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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1answer
37 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 (...
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1answer
49 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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1answer
38 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 ...
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2answers
107 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 ...
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1answer
64 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 ...
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2answers
60 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 ...
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0answers
63 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
30 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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1answer
84 views

How can I heat a crawl space to work in

The crawlspace at its highest is maybe 5 feet and lowest 1.5 feet with somewhat dusty dirt floor. It is not insulated. This winter I'll be working mostly in the larger section doing no flammable work (...
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2answers
79 views

How can I effectively drain foundation water along the sump pail location?

In my crawl space I dug out the perimeter to about 3 inches below the footings. I then laid rock and installed perforated drain with sock to keep out debris and laid rock on top. I dug a hole for the ...
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6answers
2k views

Wiring a reliable temperature switched outlet

I have an electrical wiring question. Background: I'm building my house by contracting out the daunting parts. Through a lack of good communication with the plumber, my plumber ran most of my PEX ...
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1answer
55 views

air gap between insulation batts and subfloor

I'm looking at the insulation in a crawl space below the first floor of my home. Joists are I-beams (12" deep, model TJI 350), 12" on center. Insulation is R19 fiberglass bats, tight-...
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2answers
244 views

Correct way to fix a broken block in a cinder block foundation

I have a 1954 built house with a cinder block crawlspace foundation with about a 1 1/2 foot clearance. I can squeeze in, but not easily. I'm in Cleveland, OH, so there is definitely a freeze-thaw ...
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1answer
34 views

Crawl Space Wet Spot [closed]

My house is 65 yrs. old. It has a 4' high crawl space with a gravel floor. There is sheathing on the walls. Plastic sheeting was placed on the floor when we bought it 37 years ago and we have had ...
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2answers
100 views

How to protect this foundation sill from elements, rodents?

This is a pre-fab panel house, which means the walls were delivered to a team on site that had built the foundation and floor. It's fascinating to learn how this approach impacts the final project (...
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0answers
74 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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0answers
41 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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1answer
228 views

Minimum unfinished basement door height

I have a 1927 house that is built on a hill such that the basement walks out level with side yard and the sub-basement originally had a door that walked out the back yard with two steps down to ground ...
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1answer
77 views

Is this a reasonable way to create a crawlspace over a structural floor?

So, part of my thinking on "how to build a house" includes the use of a structural floor (slab) with a crawlspace framed atop it to provide space for, and access to, service runs. (Air handling ...
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1answer
336 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 ...
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0answers
26 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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2answers
223 views

Is a too-shallow foundation allowing excessive water into my dirt crawl space?

I live in a local minimum for my neighborhood, and in fact my house is built on the banks of a stormwater drainage ditch. Most of the rainwater from the road is collected by stormwater drains and fed ...
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1answer
40 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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3answers
2k views

What is the minimum height to a crawl space, and where did you get that information?

I am working with a customer and it was a great question. I was trying to find the exact answer.
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0answers
432 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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3answers
229 views

Is it a problem that my laundry drain protrudes above ground level?

My plumber just moved the laundry's washer drain location and this is the picture from the outside: It was re-connect to the old drain pipe and go into crawl space. My question is: Does it look ...
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0answers
59 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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1answer
51 views

Crawl Space Insulation in Montreal

I have the ground floor apartment in a 100 year old triplex on the plateau in Montreal. It's an 800 sq foot apartment with baseboard electric heaters and I'm currently using over 110kwH per day to ...
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1answer
121 views

2-4 inch gap between crawlspace slab (floor) and surrounding wall - Why?

about a year ago I had my crawlspace conditioned. Among other things, the company put in a concrete slab for the floor and added a sump pump in the corner. The strange thing is, there is a 1-4 inch ...
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2answers
62 views

What should I do with the airflow in a sealed off conditioned crawlspace

First and foremost thanks ahead of time for everyone's help :) I am in the process of finishing my basement and had some questions/concerns about "what to do with the air" in my crawlspace. ...
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0answers
32 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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1answer
302 views

Widening the stone entrance into a crawlspace

I've got a 200 year old house with a crawl space under one corner of the house. The entrance to that crawl space is very tight (pictured below), and I am a large man. I want to expand the entrance to ...
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2answers
346 views

Mold in inaccessible crawlspace

I bought a 1927 house last year and, afterwards learned I'm especially sensitive to mold and this house has plenty of it. I've eliminated mold everywhere I've found it except in the inaccessible ...
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3answers
594 views

Is it a concern that 120v cables hang down from the ceiling in my crawl space?

Recently went in my crawlspace to fix some plumbing issues and noticed that all the electrical seems to be just hanging, with some on the ground. I'm fairly certain that this is nowhere close to code, ...
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3answers
110 views

What's the best way to keep humidity down in crawl space?

I have a nominally dry crawl space that is around 22' square and about 4' tall with a concrete floor. It has no indication of leaks and is dry, but too moist during the hot Maryland summers to keep ...
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2answers
106 views

Crawlspace encapsulation

This past weekend I recently had to fix the flooring of my family cottage. In a heavy-traffic side entryway, the plyboard floor was bending when you walked over it. We opened up the floor to see ...
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1answer
105 views

Encapsulating a cottage crawlspace built on bedrock

I own a 3 season cottage that is built on concrete posts that are embedded into the bedrock. I would like to use the cottage in winter and I was thinking that encapsulating the crawlspace under the ...
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3answers
128 views

Crawlspace Post to beam lumber grade

Recently we replaced some of the rotten and cracked true size 4 in x 6 in. posts under the house in crawlspace. The old posts were resting on concrete pads 24 in. x 24 in. and supporting a true size ...
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1answer
500 views

AC unit dripping onto crawl space vapor barrier

I just bought a house whose crawlspace looks like it was partially converted to being sealed off. Basically, they put down a vapor barrier and closed off the vents, but didn't finish the job. On top ...
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1answer
2k views

GFCI tripping on overload?

We called out the contractor who did our crawlspace encapsulation because the GFCI receptacle that serves the crawlspace loads (dehumidifier, sump pump, and two humidistat controlled fans) trips ...
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2answers
2k views

Can porcelain tile planks be installed in a crawl space house?

My home is a single story, about 1200 square feet, and is built on a crawl space foundation with a plywood sub-floor. The people we bought the house from had flipped the home after a foreclosure, and ...