Questions tagged [mold]

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

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1 answer
100 views

Mold got painted over. Now regrowing through the paint. What next?

The property manager sent out a handyperson, who spent about 10 minutes on shower mold, basically just painting over it. Now several months later the mold is showing through again. What can be done ...
1 vote
2 answers
86 views

Is this mould on my bed frames?

There is no spread or other visible marks surrounding the bed, but these white spots are scattered around most of the frame. Is it mould?
1 vote
0 answers
39 views

Why plaster in one corner under ground level wet?

One corner of my house plaster wall is starting, this Winter, to show condensations. As you see in the first picture below it's like drops of water starting to form. This is the stair area going to ...
9 votes
3 answers
4k views

Santizing a vacuum cleaner by sucking up disinfectant

I replaced the hepa filter and put a new bag in my shop vac a couple of weeks ago, just before I had to use it to pick up the debris from the cleanup of a moldy area. Obviously, the last thing I want ...
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1 vote
0 answers
57 views

Is this black stuff behind our medicine cabinet mold?

We removed our medicine cabinet in our bathroom in preparation for painting and discovered this water stain accompanied by some black specks. The water stain strongly suggests that this might be mold ...
9 votes
2 answers
2k views

We have mold under carpeting, what should I do?

About one week ago, I found what looked like mold under a carpet. The floor is wooden. The carpet is not wall to wall. All the other rooms do not have carpet or have wall to wall carpeting. I am ...
  • 351
7 votes
4 answers
1k views

Fastest way to dry a vented dirt crawl space (no vapor barrier) in California (Bay Area)

I read so many contradicting things online: Some recommend dehumidiers (if so, which?), some advice against. Some recommend fans (which, how many, how/where to install?), some advice against. Some ...
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6 votes
3 answers
2k views

Should I discard all flooring in a package containing mold?

I've bought 4 packs of engineered floor boards, made of a multi-ply core. Today I've received the floorboards, and in one pack, one board had mould on the 'back' side. See picture below (the picture ...
0 votes
1 answer
78 views

Possible Mold under carpet [closed]

Recently, I noticed that there was something that looked like black mold under a carpet. I am 98% sure that it is not mold but the carpet padding is slowly falling apart. The carpet padding sits on a ...
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3 votes
4 answers
807 views

When trying to keep moisture in the house down, at what point would it be best to close the doors and windows, is there a calculation?

I'm trying to keep the moisture content fairly low in my house. I have a humidity sensor in the house. Right now it is showing a temperature of 17C and a humidity (RH) of 62%. I also have a humidity ...
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3 votes
1 answer
273 views

Clarified: What are & what caused these uniform pale, flat spots in a separate storage room, which shares one wall w/a Bathroom?

I'm trying to learn possible causes for flat, pale floor-to-ceiling, slightly powdery spots in unventilated UPSTAIRS storage closet that shares one interior wall & crawlspace w/a bathroom that had ...
2 votes
5 answers
155 views

Water or mold? Showing on baseboard in basement...what next?

We've noticed some water damage on a small 8 inch section of baseboard in our basement. See below: I was going to remove the baseboard to look behind. Any other suggestions? Worried it could be a ...
0 votes
2 answers
119 views

Removing mould from a painted skirting board - won't wipe off?

I have some green patches of mould appearing on a painted skirting board at a corner and along an external wall. I have used White Wine vinegar spray and wiped away but the mould mostly remains. ...
2 votes
3 answers
912 views

Can I determine the cause of mold?

I was in my attic and took this picture. No visible water and nothing damp to the touch. 8' from a small window. Not above a bathroom. I don't think it's from poor ventilation. If it is mold how ...
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0 votes
2 answers
54 views

How to create a rounded, irregular mold for concrete

I’m interested in creating an organic rounded shaped mold to pour concrete into. It will be large, a coffee table and end tables. It has to be a pull apart mold, as I want to carve the shape on all ...
0 votes
0 answers
145 views

Green spots on wood. Is this mold? (pallet bed)

I've noticed greenish spots on my pallet bed. Is this mold or just some strange colouring? There's no visible spores or "dust", but the mattress was right on top of that, so maybe there was ...
0 votes
1 answer
39 views

Do I need existing wallpaper to help with external damp wall?

We have a north facing 1st floor bedroom (above a kitchen) which has always typically had some damp issues. It has 3 external walls with blank but painted over wallpaper, that gets replaced every 10 ...
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0 votes
1 answer
58 views

How do i fight my landlord for leaking & flooding from dishwasher & dishdisposal? [closed]

My dishwasher and disposal never worked. I moved in Aug 2018 and it leaked & flooded my kitchen for over 2 years before my landlord removed disposal. My kids room was on opposite side of wall ...
0 votes
2 answers
250 views

Help.. Black mold growing from seam in 2 peice tub/shower stall

I'm a property manager and my company aquired a new condo about 9 months ago. Upon inspecting the unit today I noticed a line of black mold under this ledge in the shower.. The ledge is apparently a ...
0 votes
1 answer
153 views

How do I cut already installed vinyl planks that are partially under wall?

I had my office enclosed by having a contractor add wall and sliding doors. I need to replace my flooring due to mold issue, and along the length of the new office wall, there are planks about 1/2 way ...
0 votes
2 answers
37 views

How much to (and how to) reduce moisture under slab before repairing drywall

Two weekends ago I opened up the drywall and replaced the valve on a bathtub. After opening the wall I was able to see that the plumber who installed the tub also apparently had trouble installing ...
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0 votes
1 answer
46 views

Will the moss on the siding affect deck repainting in short term?

I was told by some contractor that the moss (he thought there was mold as well) will transfer to the deck, and it should be cleaned by power wash before repainting the deck. However, my tenants don’t ...
1 vote
0 answers
67 views

I’m not sure what this is in my wall AC vent - fungus?

Can someone help me identify what is this growing in my ac wall unit. I’m not sure if it is mold or dust.
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0 votes
3 answers
145 views

is this black mold on my drywall?

Prepping to pull out and replace some drywall (due to, among other things, what we believe to be an open leak to the outside) and found this behind the stove. the wall looks kind of blotchy on the ...
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0 votes
2 answers
131 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. ...
1 vote
1 answer
76 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 ...
0 votes
0 answers
94 views

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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0 votes
3 answers
125 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
54 views

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
115 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
72 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
93 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 votes
0 answers
41 views

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
139 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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0 votes
3 answers
139 views

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
332 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
324 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
57 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 votes
0 answers
37 views

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
34 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
57 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
44 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
214 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
210 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
60 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
365 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
78 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
137 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
113 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
79 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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