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

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Who to call for leak+mold+diverter installation? [on hold]

We have a situation where there's probably a leak somewhere in the front-facing walls of the basement, which has caused dampness and a small buildup of black mold under the carpet in the corner of the ...
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5answers
33k views

What are the issues with using sour smelling paint?

My husband touched up the paint in our bedroom. The smell was rancid, like sour milk. I cannot believe he used the paint that went bad. I have a horrible headache and watery eyes, an obvious ...
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4answers
5k views

Is there a way to design/create a shower that is less prone to mold?

I think I've had it with traditional tiled showers...I can't stand the site of mold in between tiles, on the tiles! on shower curtains, on shower doors, etc. I think I'm pretty clean, but I always ...
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3answers
803 views

Are there any side effects of using sodium hydroxide as a mold-cleaner in the shower?

I've tried using sodium hydroxide (NaOH) to clean mold (mould) in the shower before on a patch test area, and it worked really well. This simply involves using drain cleaner (with gloves, open window ...
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8answers
57k views

What are the black spots on my bathroom ceiling? Are they mold?

My bathroom above my tub is getting some black spots on it that seems to be growing. I assume it's mold. I am wondering how should I deal with this? What should I expect it to cost?
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2answers
42 views

How to deal with this mold on the window frame?

I just discovered what I assume is mold on my window frame in the kitchen/living room (quite high humidty, but the window has been open a lot and our fan is going 24/7). Now, I've been told that ...
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2answers
116 views

What is this stuff in the attic?

What is the black stuff in the first four photos, and the white stuff in the last photo? Is any of it mold, or is it all harmless stuff? Structure is about 10 years old. Home inspector claimed that ...
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2answers
33 views

Does the thickness of insulation on the cooling pipe of an air contioner make a difference to preventing mould and condensation

We have an apartment in Port Hedland WA.( Extreme humidity and heat) It's relatively new( 3 years old) but there was mold all over the ceiling and along the walls following the air con pipes to ...
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3answers
67 views

Paint and mold prevention

Which application produces the best results, with respect to mold prevention: An all-in-one paint with primer Apply plain primer, then regular paint Is using either process better for mold and ...
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1answer
231 views

Is using a thermal camera an effective method to locate mold & moisture behind finished walls in a basement?

My basement is finished and there are signs that I have leaks or some mold. The smell is not very strong but I can feel it for the first few seconds when I enter the basement, after that it instantly ...
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1answer
56 views

cleaning mold with bleach - residue from previous cleaning

A bathroom wall is covered in mold. I have a foam spray cleaner that contains bleach to remove mold. I have previously cleaned the wall multiple times with various wipes and a vinegar mixture. I want ...
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3answers
96 views

How much drywall should I remove around a moldy area?

The previous owner told me that during the last winter when snow melted, water got in the basement through the drywall and he had to wipe dry the floor. Last year we had one of the worst winters on ...
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2answers
74 views

Mold Growing on Top of Exterior Door

I am not that knowledgeable with mold. On my exterior front door by the head and the door stop I have mold growing. I checked the drywall and it doesn't seem to have any water damage. I was thinking ...
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1answer
111 views

Basement waterproofing with thermal break

I need help figuring out best solution to fix my basement moisture/mold issue... As far as I can tell, water is entering at bottom seam of poured concrete wall and basement floor. I considered ...
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2answers
46 views

Open windows to help condensation problems in winter - good or bad advice?

I live in a Victorian gable end terrace which is classed as 'hard to heat' and sufferers from mould/ condensation . I have taken all the insulation measures I can afford & treated all obvious ...
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3answers
88 views

Do I need to replace water damage or just let it dry out?

I had a water leak under my kitchen sink. It happened pretty slowly over the course of perhaps 8 weeks. The bottom of the cupboard was saturated and about 6 " up the sides of the same cupboard unit. ...
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1answer
430 views

How to remove mold from Styrofoam ceiling tiles?

I've recently noticed, that there are some sort of (stains) on a ceiling in a bathroom. The ceiling is covered with Styrofoam tiles of square shape. I took a closer look and it seems to me that it ...
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5answers
197 views

Please help with big mould/mold problem!

Before I get down to details I just wannna say that we are in UK and unable to go anywhere else as of financial issues. We've been living and renting a bottom floor flat for 4 years and it's been ...
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2answers
117 views

What are the considerations for crawlspace encapsulation barriers / humidity control?

I live in a house that's half slab, half crawlspace. The crawl is half basement. Typical crawlspace/basement humidity readings are: 80% RH @ 67°F 85% RH @ 68°F 78% RH @ 67°F Where in the ...
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3answers
229 views

How should I treat mold under the caulk around my kitchen sink?

I've got a tiled kitchen countertop and have noticed some mold under the caulking around the sink, especially where the tile dips. Should I clean out the old caulk and re-caulk the area, or pop the ...
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1answer
39 views

Do I have a mold problem?

Hi DIY Stack Exchange! I had a fun wintertime question about moisture and mold. My bedroom has been getting dry lately and with that comes dry hands, and small furniture cracks. Fun! So I went to go ...
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1answer
59 views

What is more effective - mold control spray or the fogger?

Concrobium sells mold control spray and the fogger. Which one has more lasting effect on the mold? Does the $135 cost of fogger justify the effect it has on the mold?
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3answers
9k views

What is the recommended way to destroy mold?

Back in the day I've heard that bleach is a good way to kill mold. The other day a home inspector suggested that Dawn dish soap actually works much better than bleach. I've heard from another home ...
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2answers
51 views

How to fix a vanity mold built up as a result of valve leak?

I noticed a valve leak too late and now part of the vanity has built up some mold. I would like to avoid replacing the entire thing obviously. So I would like to understand how (un)safe it is to keep ...
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3answers
271 views

How to prevent mold in stored joint compound

Joint compound comes in larger containers than I need. I have had this problem for years where storing opened but unused joint compound leads to mold growth, usually starting within a week or two. I'd ...
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1answer
111 views

How to avoid mold in shower caulk?

For the third time, I plan to remove this strip of caulk in my bathtub/shower a bit beyond the discoloration (mold?) and recaulk it. I would like to get it right this time. I plan to remove the ...
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1answer
69 views

Is white vinegar as effective against black mold as rice or apple vinegar?

Does anyone know if you can use white vinegar to irradiate black mold from inside window panes? I see they mention rice vinegar or apple cider vinegar; is there a difference on how those react with ...
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4answers
114 views

What is this black coloring in attic?

Curious if anyone can tell what this is? Not sure if it's mold or if it is something else. The yellow in the closeup is sap I believe but the black stuff almost looks like super small poppy seeds. ...
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1answer
107 views

How can I prevent clothes and food stuff from going bad in a moist cabinet

My neighbors are constructing their house from ground up. We have concrete structures for almost all buildings here. When the walls are ready they need to water it so the concrete settles and get ...
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1answer
54 views

Does filling in cement(inside or outside the house) act as a deterrent to the soil-water and mold problems resulting from it?

An experienced contractor suggested to me that filling cement near the bottom one foot of basement walls will stop the water from coming inside the basement. And also, a 2 feet of cement floor around ...
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2answers
153 views

Help diagnosing source of basement moisture

Hoping your experience can help figure out where moisture is coming from in my basement. I tried to include a lot of details to help identify issue. I have a house built in 2008 with finished ...
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2answers
82 views

How do I dehumidify a season cabin in the winter

My Aunt has a seasonal cabin in NH. At the end of the fall we shut the water off and close down the cabin. Last year we had to gut and re-do the entire cabin due to a mold problem. Part of the problem ...
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2answers
90 views

If black mold is discovered underneath the siding, does that necessarily imply interior air quality problems?

Consider this video. Without a vapor barrier, this home will accumulate black mold on the plywood on the exterior of the home. My Question: Does black mold on the exterior of a home necessarily ...
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3answers
3k views

Is there a way to remove the mildew smell from under tile without damaging the tile?

We live in a rental. The toilet was leaking when we arrived. Landlord paid for a plumber to do a simple repair, but before that, there was definitely water pooling underneath the tile (and seeping ...
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1answer
326 views

Should I remove vinyl flooring to allow the floor underneath to dry out?

We are renovating a 200+ year old house that had a dirt basement. We poured a concrete floor and put vinyl flooring (snap-together, looks sort of like wood) over this. The basement has gotten wet ...
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0answers
38 views

Had a leak behind a new tub do I need to do anything else to prevent mold or other issues?

About four weeks ago I had an old tub/shower enclosure removed and a new acrylic tub and three wall enclosure put in, including a new valve and moving the shower head up, this was all installed by a ...
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2answers
865 views

What license/certifications are appropriate for mold remediation firms?

I am looking for someone to clean up mold in my attic, and I have been advised to find someone who is licensed in the area of mold. I’ve checked HomeAdvisor and BBB, but it’s not clear to me who ...
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2answers
73 views

Is this cement board / Sheetrock still ok to use in my bathroom?

Our builders are putting up cement board in the bathroom, and we noticed the pieces on the left have some stains, they look very different to the rest that looks the same as the ones on the right of ...
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0answers
85 views

Painted drywall with spoiled zero-VOC paint. Does Bin Shellac work to seal mold/bacteria? Some posts say no

My mother painted drywall with “spoiled” zero-VOC Banjamin Moore Paint (Natura). It was 5-year old paint, which had been opened/used years prior without a problem. The result was serious allergies and ...
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1answer
256 views

Killing mold IN drywall using Borax solution - what now?

My family is renovating an apartment and someone thought there was mold inside some drywall that showed water stains from when there was a leak in upstairs apartment. This person prepared a Borax ...
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1answer
754 views

How to repair leak mould under bathroom floor tile?

The attached picture is a bathroom floor. The tile worked loose and on lifting it I found extensive black mould under it (killed and cleaned off it before the picture was taken with a mould killer ...
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1answer
102 views

Causes of condensation in basement wall

First time home owner of 1 year old house in Southern Ontario. South facing basement wall (50% above grade) has condensation forming between polyethylene barrier and pink batt insulation. What ...
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2answers
381 views

Mould on the inside of a bitumen corrugated sheet

Attached to the end of our house is a small shed. It has four (newly built) brick walls and a bitumen corrugated sheet roof. The shed was finished about eight months ago and is fairly waterproof. ...
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2answers
806 views

Will KILZ® contain black mold?

we had a leak awhile back inside the wall, from a shower valve leaking. That has been corrected and everything is dried out. Today while tearing out the sheet rock on the wall that backs up to the ...
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2answers
4k views

Mold remediation in crawlspace

Just bought a 25 year old home that has improperly installed insulation in the crawlspace. The insulation is fiberglass rolls with a paper backing, and is installed with the paper facing down, toward ...
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1answer
230 views

What do I do about a VERY MOLDY dishwasher air gap?

Just moved to a new place a few months ago and there is TONS of mold in the dishwasher air gap. Ive never had one before so I never thought to look inside to see what it was. I recently went to the ...
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1answer
222 views

rusty stains showing through a newly dried spackle

I noticed the wall by my balcony door was soft and sticking out, figured somehow there was moisture and possibly mold growing underneath the drywall lining. So I ripped that part out, scraped a ...
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3answers
100 views

Is there a way to deal with mold built up on the washer bellow tub?

It looks like people who used to live in the house before us would keep the washer closed for extended periods of time and here's the result. I suspect it also contributes to odor issues the house ...
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2answers
166 views

Is this mold growing on my shower ceiling?

Is this dark stuff above my shower mold? If so, how should I go about removing it? I live in an apartment, so I doubt I could go on with scraping it off and the like without upsetting maintenance, ...
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1answer
116 views

will anyone stop laughing n thinking im crazy long enough to see theres a major problem(s) in my house? [closed]

As the title suggests, i have many issues in the home i purchased two years ago. And although, couuuntless hours attempting to unravel the mystery, and thhhhousands of dollars to fix the problems i ...