Questions tagged [mold]

Preventing, identifying, or treating mold infestations in the home.

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2 answers
27 views

How to fix or remove skylight on metal roof that was installed over shingles?

The previous owners installed a metal roof over existing shingles less then 10 years ago so we were told the roof should last at least 20 more years. A heavy rain revealed a leak from our skylight. ...
0 votes
1 answer
46 views

Can’t tell if this black stuff is mold

I found a strange looking substance on a shelf in my closet. I can’t tell if it’s mold or just dirt/grime. A picture is attached below. I wiped it down with vinegar/baking soda/detergent, and some of ...
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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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3 answers
103 views

How should I go about repairing this door casing?

It's the door of the bathroom in the basement, which hasn't been used for at least one year. The relative humidity is 50%. I'm not sure how the rot happened, since it was before I moved in. The rotted ...
0 votes
1 answer
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How to clean and fill seams around tile

There are the seams around the door frame and tile in the bathroom. I'm not sure if the black dirt in is mold or mildew, but at least it's not very clean. The relative humidity is 50%, but the ...
0 votes
3 answers
104 views

Where could the mold, forming in the corner of the garage, be coming from

I noticed the following mold in a corner of my garage. Where is it coming from, air flowing around the door or hinge? Could the garage door (right), contribute to this? How does one stop this from ...
1 vote
1 answer
58 views

Bottom plate needs replaced of this load bearing wall?

Should I replace this bottom plate? This is load bearing wall. Want to know from all of your experienced people out there. There was a leak that has been fixed. The other side of this wall is my ...
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0 votes
1 answer
77 views

Water Leak, Plaster Wall

thanks in advance for your thoughts. I recently purchased a 1920s house that suffered water damage to a third floor (attic conversion) bedroom. The slate roof has been repaired--the chimney is on the ...
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0 answers
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What is the most effective way to put paneling on old style red brick

I live in an old cottage style house. The exterior is old red brick, I call it old red brick because I'm sure it's not used no more it is about the size of a cinder block. When built there is ...
0 votes
1 answer
133 views

What is this growing outside my window?

Just noticed this on my window (external), it has been raining for a few days last week not sure if that's related. Location: Melbourne, Australia. What is it? How to deal with this?
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3 answers
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Is this black mold? Do I have to vacate my home?

I am tearing out some wet ceiling in my kitchen. I found this on the underside of the drywall. Am I looking at black mold? If so, do I need to evacuate my family and pets from the house? For ...
1 vote
1 answer
109 views

Is mold on new construction framing a concern?

I'm having a new construction home built. While touring the home, I noticed some black stuff on some of the wood (and gray stuff on other wood). The builder tells me it's just from the wood sitting on ...
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2 votes
5 answers
322 views

Mystery irritant at home [closed]

There is something in the house in which I live that gives me and my partner itchy eyes, aching joints and extreme fatigue. Extensive medical examination excluded allergic reactions to dust, pollen, ...
1 vote
0 answers
54 views

Mold odour immediately after rain! No sign inside or outside

I live on Prince Edward Island, on the east side of Canada. We renovated our old building completely last year, so everything is new and neat except the main structure. Now immediately after rain, we ...
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0 answers
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Identification of Mold

I am working with some old plaster and a few days after it set, I found that pink mold or fungus appears to be growing on it. See attached photo. Please help me identify what type of mold this is and ...
1 vote
1 answer
30 views

Proper Flow under Kitchen Sink connected to Disposal

Hi all, I really appreciated the feedback on my last post pertaining to bathroom sink p-trap, so I thought I'd try to get some advice on this situation. It's been like this since we've moved in, (...
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0 votes
1 answer
46 views

The new path of concrete slopes towards the house and is causing mould

This was part of a renovation / build done by a licensed builder. All works are still not finished but they say it's nothing to worry about . Is it a problem that they should be responsible for as ...
0 votes
1 answer
38 views

Mold growth around toilet

We've got some mold growing around the base of our toilet (photos below). We're going to pull the toilet up to see what's going on, but wanted to get thoughts on what might be causing this, what to ...
1 vote
1 answer
83 views

Is this mold on my concrete slab foundation?

Is this black stuff mold on the concrete foundation? In the process of replacing the bath/shower plumbing and fixtures I started chasing mold from the surround. As I followed the trail underneath the ...
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0 votes
1 answer
127 views

Bought a house and very strong damp/sewer smell in main bedroom

Just recently bought a house which has been renovated. It was in a pretty poor state beforehand however since we've moved in (house has been vacant for 7 months at least) the main bedroom has a ...
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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 ...
0 votes
0 answers
170 views

White Spots on Wood in Attic

Went up to the attic today and saw these white spots on the wood for the ceiling. Just wondering what they are and if I should be concerned? And also how to get rid of it and prevent it from coming ...
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0 votes
1 answer
73 views

Apartment has through-the-wall AC with mold, next steps

My apartment has though-the-wall AC with mold. Landlord informed me that ACs are not part of lease/apartment. AC was left by previous tenant? Is all mold in AC bad, as I have noticed many in different ...
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0 votes
1 answer
59 views

Moisture in bay window bench seat

I live in a 1940s house with uninsulated double brick wythe exterior walls. The interior wythe has some kind of masonry skim coat. The front wall of the house has a bay window. Last spring, I built a ...
1 vote
0 answers
70 views

What is this gray material/film on the edge of my desk?

There is this gray material that only appears along the edges of my desk but on both exterior and interior edges. I inspected the desk closely after I first assembled it and did not find this material....
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1 vote
1 answer
78 views

Having trouble with mold in one spot

This is between a toilet and a bathtub. For whatever reason moisture is condensing here everyday. It is dry after a shower but at some point overnight it starts condensing. My main question is what is ...
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0 votes
1 answer
58 views

mold on window sill due to whole house humidifier

In the winter my house's humidity naturally drops to 20%. We had a whole house humidifier installed and raised the humidity to 35%. The air is much more comfortable but we get condensation on the ...
0 votes
1 answer
133 views

How to fix moldy caulking over grout in bathtub corners?

As part of the cosmetic updates for the bath, I decided to remove the moldy caulking where the tile meets the bathtub. It looks like the previous owner put the caulk over the grout, I'm assuming ...
2 votes
0 answers
39 views

My screened in porch with concrete slab for flooring smells like dirty feet at night

I purchased a home that at the time was an open porch with a concrete slab as a floor (painted). Early in 2021, I had it screened in and wanted to paint the concrete a different color. I stripped/...
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0 votes
1 answer
77 views

How do I identify source of mold smell in garage

Recently we had the garage redone - into a private "apartment" (bedroom, bathroom/shower, oven/stove, sink) We've begun to smell a moldy smell, the kitchen hasn't been used yet, though the ...
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0 votes
2 answers
137 views

Joists in Basement (for main floor) black - is this mold?

In a storage area in my basement, the ceiling is not finished. I notice recently that the wood joists for the main floor are covered in these patches of black. Is this likely mold or something else (...
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2 votes
0 answers
539 views

Is this mold on my OSB subfloor?

I wanted to get the opinion of the community here with this issue I'm having. New construction home here, pics are from the basement of the underside of the main floor subfloor. My builder is saying ...
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0 votes
2 answers
216 views

How to remove this shower drain grate (or otherwise remove mold from the pipe underneath)?

As you can see, there is black mold growing inside the white pipe under this shower drain cover. I've removed the 2 screws. The silver metal circular grate still feels stuck. If I try to pry it out ...
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0 votes
1 answer
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health effects from mold in HVAC [duplicate]

We noted a musty smell coming from our heating ducts in the last few heating seasons. We first tried the usual things like changing filters, cleaning dust, etc., but finally called an HVAC tech to ...
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1 vote
1 answer
42 views

What do the parts not in plain English in this Concrobium anti mold product web page mean: "Cas #", "Builder", and "Withheld"?

This home improvement product company web page about an anti-mold product called Concrobium https://www.concrobium.com/products/mold-control-spray/ has the following table: Ingredient Cas ...
28 votes
5 answers
5k views

Why are we to leave a front-loader clothes washer open, but not the dishwasher?

Everywhere, everybody, says to leave the door open on your front-load laundry washer so it can dry out and not accumulate mold. But no one, anywhere, says to leave the door open on your dishwasher. ...
3 votes
1 answer
109 views

is this mold where I have taken the wallpaper off?

I have started removing the wallpaper in my house and I've noticed this black stuff where the plaster has come off. I'm not sure what it is. I have tried looking at images of mold but not sure. It ...
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1 vote
2 answers
75 views

Rough hewn wood for porch construction

My front porch was constructed using rough hewn wood as an architectural choice, with knot holes, cracks and crevices. The wood is painted white. Although it looks great, after just a few months the ...
0 votes
0 answers
142 views

Are these black marks on the wall from sanding?

I was told these markings on the wall are from "sanding". I believe the walls are plaster. I wasn't sure if I should believe it since it's in a strange pattern. However, it might be ...
0 votes
0 answers
159 views

Blackish Stains on bedframe slats

I was in the process of disassembling my bed for an impending move, when I noticed some blackish stains on the bed slats. Wondering what they are. Is it salvageable or should I throw it out ...
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0 votes
0 answers
175 views

Is this termite damage? Mold damage? Something else?

I recently sold an old freestanding wine cellar and found a lot of dust and some mold underneath and behind it, plus this circular area on the baseboard, with some wood shavings below. Doesn't look ...
3 votes
2 answers
1k views

Help me identify: Mold or fungus or Moss?

I live in a rental house and I see this growing on roof. What is it: is it moss mold or some fungus/algae? Should i be worried for my health? The clear line where it grows is likely because it has ...
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0 votes
1 answer
111 views

Fixing water-damaged, rotting frame. Who to hire?

I'm renovating my basement bathroom and feel over my head as maybe this is a bigger problem. First time home owner. What professionals should I hire to assess/fix this issue? Please be specific ...
0 votes
1 answer
71 views

Daylight basement remodel, found mold on what appears to be drywall between exterior siding and studs. Do we need to remove ALL the siding to repair?

While working on removing paneling in the daylight basement, we discovered mold on what appears to be black papered drywall in between the exterior siding and the studs. This was pointed out during ...
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2 votes
2 answers
171 views

What is this dirt on the top of my high ceiling wall, how do we remove?

We just noticed there is some dirt on the wall by my foyer close to the ceiling. On the other side of this wall is a small attic space. The wall to the right, where the bar is, has a bedroom on the ...
-1 votes
3 answers
164 views

How can I get my building owner to deal with a mold issue?

I live in an apartment with no ventilation to the outside. The bathroom fan is ductless as is the range fan in my Kitchen. I have a mold issue in the apartment due to the lack of proper ventilation ...
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-1 votes
1 answer
187 views

Insulating behind tar paper?

I have a home built in 1959 in Southern California with stucco exterior. I’m removing the drywall to do a major renovation and bring my wiring up to code. I noticed there is no insulation and just ...
1 vote
2 answers
86 views

These odd stains for appeared in the top room of my house. They weren’t here a couple of days ago. Could they be mold? Water stains?

Blotchy stains on the ceiling. These go all around the room. [
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0 votes
1 answer
150 views

Black stains in wood, identifying the cause

I found a used bedroom furniture set which includes a bed frame and box spring. I've put together the bed frame but upon looking at the box springs more closely, I see there are some dark stains ...
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0 votes
0 answers
131 views

What is the cause of this discoloration on stucco siding?

I was wondering what this greenish discoloration is on my stucco. I think it might be water related since there’s some wood rot I’ve felt under that area (a whole other can of worms, I know). I Was ...
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