Questions tagged [mold]

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

70 questions with no upvoted or accepted answers
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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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83 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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41 views

Upper Floor Window Condensation Issues - HRV?

We live in a 2 level home with basement in central washington. The winters average 20-36 degrees Fahrenheit with humidity levels of 70-99%. Summers are fairly warm to hot with lower RH. Our issue is ...
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2answers
58 views

Replace or clean stained carpet after mold issues?

I moved into a new build just over a year ago, and a few months in mold issues occurred in the nearby closet. The main cause of this was an exterior concrete wall which was still drying, and led to ...
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19 views

Bathroom condensation

My bathroom is mouldy and retains condensation on walls, windows etc. The room is approx 8fx7ft x 8ft high. I’ve installed a new inline Manrose fan with timer to replace cheap old online fan, the ...
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22 views

Damp exterior bricks near the roof and windows

I been looking everywhere. Some say it could be a drainage issue or mold. Would anyone know what could cause this discoloration?
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2answers
278 views

Vapor barrier on heated entertainment shed

i am building an 8x10 entertainment shed with a loft for kids to hang out and have sleepovers in, i will be heating it. I have tyvek and t1-11 it is on 4x4 skids on top of the Concrete patio and has 3/...
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45 views

Why is the bathroom ventilator constantly running?

Recently due to an outdoor smell which is making me ill I've had to close all my windows in my small 1 bedroom flat. I now notice the bathroom ventilator is constantly running whereas before it used ...
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30 views

Sealing/resurfacing exterior concrete retaining wall

I have a 3 ft concrete retaining wall that runs across our backyard. It collects a lot of black mildew with white spots. Is there a sealant or other surfacing material that I can use to help keep ...
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83 views

Mold or something else?

What is this, is the mold anyone know? Photos: 1 2 3 4 5 6
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1k views

Get rid of mold in closet already painted over

I have mold in a closet with 2 water pipes. 7 years ago there was a leak upstairs that ran down. My roommate does not want to involve building so it's up to me. I had a removal company come and do a ...
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118 views

How can I determine if there is mold on my fieldstone basement walls?

I recently purchased a home built in 1908 which has a fieldstone foundation. The basement remains unfinished and has a cold room. Recently water started appearing on the basement floor and I want to ...
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577 views

What causes mold on brand new porcelain tile--literally after only 4 well-ventilated showers with fan on?

I just had a brand new addition to my house constructed including a new bedroom and master bathroom installed. All went well with two caveats: (1) there was substantial flooding in the house near ...
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73 views

Mold on my One Month Old?

Moved in my newly built Wisconsin house in the first week of November. It's a raised ranch with unfinished full walkout basement. Insulation is fiberglass batting with 4mil poly over external wood ...
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60 views

Can mold growth be removed and cleaned up in a two-story apartment building successfully?

I live in an apartment building that has 24 units which all the bathrooms vent into the hollow walls or their neighbors bathrooms upstairs. (so in their ceiling, the smell and moisture comes out ...
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2k views

What is the cause of and how can I prevent mold on an interior wall close to my bed?

Our main bed is pushed against the corner in our room. There's a very small amount of space between the mattress and the two walls. We removed the frame and the headboard so that the box spring sits ...
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114 views

How can I paint an area without color-matching after treating mold?

Is there a clear paint that I can use after I have treated an area for mold in the bathroom? I don't want to try and match the color.
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4answers
696 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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91 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 ...
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47 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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61 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 ...
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55 views

smell behind skirting board in basement room

I live in a house when one floor is basement. We had some damp bubbles in one of the room walls and the builders who renovated the house in 2020 came to fix. They checked the whole perimeter of the ...
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1answer
72 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 ...
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41 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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30 views

Mold on cedar siding

Bungalow style home in Milwaukee WI with finished attic. Can access the Southern portion of the attic,via a crawl space,but not the opposite side. We had ice dams this winter and there is mold on the ...
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33 views

Rescuing mouldy wooden furniture

Most of my furniture has been in an unheated house for 6 months (extension and rewire). Most of it has now developed mould - one of the worst affected pieces is pictured but most of it has patches ...
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18 views

How can I mouldproof a conservatory?

We bought a small conservatory a few years ago. Despite following all the available advice (minimising condensation, cleaning regularly, etc...) mould still accumulates in the corners. What can I do ...
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17 views

Mildew around window retrofit inserts

Some of the windows in our house have mildew around the replacement window inserts (~18 years old). Mostly at the bottom. The original frames were aluminum, the inserts of course are PVC. The ...
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37 views

Mold on Bathroom Ceiling

I have a popcorn ceiling in my bathroom that has a tendency to collect mold. I clean it off with bleach but it always comes back. There was no mold prior to remodeling the bathroom a few years ago, ...
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0answers
60 views

If a dirty Merv-13 Furnace Filter is still passing air does that mean it is still catching allergens like mold spores?

I built a DIY air filter by fitting a Merv-13 air filter inside a cardboard box. It's held in place by wood strips cut and glued to the box and I cut a hole for a 200mm case fan with a 12v power ...
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91 views

Condensation on HVAC, mold on joists/subfloor in basement

I have heavy condensation on the plenum and supply line near an exterior wall/window in my unfinished basement. I have mold and moisture on my subfloor and joists just in this 3 sections. I sealed up ...
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214 views

Rot or mold on the underside of deck

Anyone know what this stuff is? Had boards similar looking to these on our deck two months back, ripped the bad boards out, but the neighboring boards acquired the same ailment since then. Ripped ...
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2answers
200 views

Do these pictures suggest mold is growing behind walls?

Seeking advise on mold. This wall isn’t hard, feels kind of soft to knock. Do u know what material it is and can mold hi through it? You can see in the pics I peeled it and it just revealed more ...
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33 views

How to diagnose damp coming up through cracks?

I'm suspecting that my flat may have a damp and mould problem coming up through cracks etc and into my airspace. I definitely know in one room there is damp underneath the floorboards though I ...
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49 views

Can this cabinet piece be repaired?

I had damp and mold develop behind kitchen cabinets. The mold penetrated all over a backboard and I got rid of it. Then there is this bottom surface. You can see it’s all gone black. The ...
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3answers
143 views

Solution to put down a window sill crack to prevent mold

I have a couple windows where there is a space below the window that goes into the wall (see bottom of picture). There was mold and condensation all around the area, so I'm guessing there's mold down ...
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24 views

Had a slow leak into bathroom ceiling/wall but humidity was low and controlled in that area for 2 weeks. What is mold Risk?

Installed a new furnace humidifier to replace a non-working(probably never used) vintage humidifier 14 days ago in a new place I bought. Confirmed a small gap let a slow drip from condensation that ...
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461 views

Black mold or termites?

I’m not sure bout the bug or the mold looking stuff the board is dry and so was the wall behind it but it’s def dark enough there. Any thoughts would be great
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35 views

Installing HVAC return in mold-infested room

We're in the process of reducting our house for a central HVAC system. We have an insulated "cold room" in the basement that had an outbreak of green mold in the past, probably from an old fridge but ...
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47 views

How can I prevent mold from growing on my bathroom walls?

The humidity in my bathroom is causing mold to grow on the walls. In addition there was a leak in the roof, that stained the ceiling, and now the ceiling is discolored as well even though the leak ...
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0answers
223 views

Damp/Wet Corners with Mold in House

In the outer corners along the external walls of our house, and inside closets on external walls we are experiencing water and moisture gathering on the flooring and there is mold appearing on the ...
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0answers
307 views

Basement room + concrete foundation + drywall + moisture question

Basement + concrete foundation + drywall / moisture question: just got drywall glued to a small portion of concrete foundation in an unfinished basement room: Should I have contractor remove these ...
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0answers
513 views

Black water from kitchen sink cold water line

Today I noticed my kitchen sink was leaking underneath in the cabinet. I went to take a look and it looked as if it was coming from somewhere inside the faucet. I disconnected the lines and removed ...
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0answers
84 views

Furnace with no filter is drawing air from the basement which has black mould. I am looking at renting this house?

The house I am looking at renting is old but nice. Problem furnace in the basement has had the outside air intake closed so only draws air from the basement. The filter has been taken away and parts ...
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0answers
304 views

How to remove surface mold on shower walls and ceilings?

I'll be doing a small bathroom remodel on a VERY old house which mainly includes installing bathroom fan and a full paint job as the main tasks. On first walk through, I noticed that the house has ...
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0answers
463 views

Why is there mold on the ceiling of my second floor balcony?

I have owned a new build house since August of last year. There is a balcony on the second floor and the ceiling of it is below my third floor. The side of the house has HardyPlank siding. Since last ...
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313 views

basement drywall over vertical brick surface

I'm attaching drywall to the studs in my basement. The wall's frame of studs is standing on top of a tiny wall of bricks, one brick deep. The bricks were already there, acting to dam water so it ...
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128 views

Should I seal this floor or should I just put down vapor barrier before tiling?

I had some water compromise a vanity, leading to its removal. There was a void in the floor where it was originally tiled around, so the entire floor will be retiled. Upon demolition, I noticed some ...
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51 views

Mold coming from laminate - how to evaluate what's underneath?

Appartment There is laminate in my 55m² appartment, except for kitchen and bathroom. Underneath that is some sort of "foam mat" (don't know the exact term). At the desk below my chair there is a PVC ...
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47 views

How to remove mold from cloth upholstery

My coach is covered in black mold, Google search shows various suggestions including vinegar, bleach, hydrogen peroxide, rubbing alcohol. Which is the most effective proven method to remove mold ...