Is mold in an attic a big deal?
Yes. While you should address mold in your attic of a large extent, smaller areas of mold may not be an issue. Mold is naturally occurring in your environment, but too much mold can be harmful on your body and on your home. Explained above, mold is caused by moisture.
How much does it cost to remove attic mold?
Letting molds grow in your attic undisturbed may cause you a treatment cost of around $1,550 to $3,550. However, depending on the severity of the infestation, you can expect to pay as high as $5,500 to $7,500 for any attic mold removal project.
How to kill attic mold?
The Best Way to Kill Mold in the Attic
- Causes of Mold. While damp and warm climates are a prime breeding ground for our fuzzy friend, other conditions that...
- Hydrogen Peroxide Method. Take three percent hydrogen peroxide—which can be found at most grocery stores—and put it in a...
- Vinegar Method. Another way to attack mold in the home is with vinegar. While not...
Why does Mold grow in my attic?
#1 A Leaking Roof
- Check for discoloration of insulation and wood (e.g. ...
- Check roof valleys (i.e. ...
- Observe skylights, chimneys, attic windows and any portion of the attic/roof where dissimilar materials join each other (including flashings). ...
- If you have a vapor barrier installed, check for condensation. ...

Should I worry about mold in the attic?
Unfortunately, mold in the attic is a serious hazard that can lead to serious illness or even death. Mold can lead to a variety of health problems, some of which include the following: Respiratory illness and/or infection. Itchy, watery eyes.
Is mold in the attic a big deal?
In the attic, mold can degrade drywall, spread to the ceiling below, and even cause problems with your roof's life expectancy. Attic mold occurs in the attic primarily due to the accumulation of moisture from condensation in the gap your attic fills between your warm house and the cold air outside your roof.
How do I get rid of mold in my attic?
DIY Attic Mold Removal -Hard Surface CleaningHydrogen Peroxide. When using hydrogen peroxide, spray the area to clean thoroughly, and let it sit for 10-15 minutes. ... White Vinegar. For white vinegar, spray the area to clean thoroughly, and let it sit for at least 15 minutes or up to one hour. ... Baking Soda. ... Essential Oils.
Does attic mold need to be removed?
In most cases, attic sheathing with mold does not have to be removed unless there is significant structural damage. However, it does need to be carefully treated and sealed.
How long does it take mold to grow in an attic?
How Long Does It Take for Mold to Grow?Location of the MoldHow Long It Takes for the Mold to GrowHow Long It Takes for the Mold Spores to Become VisibleHidden Surfaces24 to 48 hours24 hoursHard Surfaces24 to 48 hours14 to 21 daysAttic24 to 48 hours24 hoursWet and Warm Areas24 to 48 hours24 hours1 more row
How fast does mold grow in an attic?
How Fast Do Molds Grow? Once enough moisture is present, molds can begin to grow in less than 48 hours! Water from leaks, condensation, and poor ventilation can cause a ticking mold time bomb. Time is not on your side!
Does homeowners insurance cover mold?
As a starting point, most insurance policies do not cover mould. That is, most insurance policies expressly state that they do not cover damage if the primary cause of it is mould; eg rising damp. However, most policies will pay if the mould damage is secondary to an insured event.
How do I know if I have mold in my insulation?
What are the signs of mold growth on fiberglass insulation?The musty smell gets stronger as you move closer to the insulated wall or attic.Experiencing constant cold, allergy symptoms, and other health problems.Observation of black, green, gray, or brown splotches on your fiberglass insulation.
How do professionals remove mold?
All contaminated surfaces will be vacuumed with a HEPA vacuum to trap the mold spores while releasing clean air, unlike traditional vacuum cleaners. Next, a professional will spray and wipe down the once contaminated surface with microfiber cleaning cloths.
Can you paint over attic mold?
You can paint over mold, but it will always reappear if you don't stop it in its tracks. Mold can cause severe respiratory issues for your family and pets. Before taking steps to clean and kill the mold, identify where the excess moisture is coming from and take steps to treat it.
What does harmless black mold look like?
When searching for black mold, look for circular-shaped spots that are black, dark green or dark brown. Some black mold can also take on shades of orange or have flecks of white within it. Most of the time, black mold has a slightly furry appearance.
What should you do if you are exposed to black mold?
A solution of warm, distilled water and saline can also help rinse your nasal passages of mold spores and remove congestion. OTC medications. Antihistamines, like cetirizine (Zyrtec) or loratadine (Claritin), reduce your immune system response, minimizing airway inflammation.
Why is the plywood in my attic turning black?
When moisture condenses on plywood roof sheathing repeatedly or continuously the wood will turn black. This can be caused by the action of moisture interacting with the tannins in the plywood.
What is the best product for mold removal?
Keep Your Home Safe and Clean With The Best Mold and Mildew Removers1 RMR-86 Instant Mold and Mildew Remover.2 Star Brite Mold and Mildew Remover.3 HOME ARMOR Mold and Mildew Remover.4 CLR Mold and Mildew Remover.5 Boater's EDGE Mold and Mildew Remover.6 RMR-86 Pro Mold and Mildew Remover.More items...•
Why is my attic black?
Dark black staining on wood surfaces — If the wood in your attic shows any black discoloration, the problem has moved beyond moisture; you have mold that should be removed. Attic feels excessively hot or stuffy — Attics should feel breezy if they are properly ventilated.
How common is attic mold?
If you have the unfortunate experience of having to deal with attic mold, know that you’re not alone. Attic mold is very common and is dealt with by tens of thousands of families every year.
Why is it so hard to breathe in an attic?
Furthermore, respiration and breathing can be very difficult in attics due to their usually being small and hot confined spaces and even doubly so when the small confined attic space is filled with mold spores.
Why is my attic stuffy?
When an attic is stuffy, that indicates you have a ventilation problem, which often results in mold problems. Frost buildup on the underside of the roof sheathing in winter — When it’s cold enough outside, water vapor in an attic with improper ventilation can freeze on the underside of your roof.
What does it mean when you smell mold in your attic?
The smell of mildew in the attic — Trust your nose. A musty or moldy smell in the attic means there’s a moisture problem somewhere.
What does it mean when your attic is wet?
Wet insulation in the attic — Not only is this a sign that you may (or soon will) have a mold problem, but when insulation gets damp or wet its ability to insulate becomes significantly diminished, costing you extra money to heat/cool your home.
How much venting is needed for an attic?
Check your local building codes for what’s required in your area, but in general, 1 square foot of venting is needed for every 100 square feet of attic space .
Why is there mold in my attic?
It is caused by excessive moisture from air movement from humid air in your home, to a low humid attic with lower temperatures.
Why is mold on my ductwork in Florida?
This is because the humidity is so high, it can reach cool points in the attic and condensate.
Why is there mold on my ceiling?
So basically, mold can become a problem when there is excessive moisture that eats away at building materials (decays wood), or begins to condensate so much that it is causing stains on your ceiling. Of course, with everything wet, it will cause more mold and can be harmful to breathe in.
What would happen if you were to do that up north the humid air would instantly combine with cool air in the at?
On the other hand, if you were to do that up north the humid air would instantly combine with cool air in the attic and begin to dew causing mold/staining.
What causes cracks in ceiling?
These cracks, as mentioned above, could be from light fixtures, drywall junctions, attic ventilation, plumbing stacks, anything that goes into your attic and penetrates your ceiling.
What is the best way to stop air from moving into the attic?
Air sealing can stop air movement into your attic which will prevent humid air entering a cold low humid attic space.
How to tell if mold is on roof decking?
So, if the mold is on the roof decking, the air is probably leaking right below that area. Another Pro Tip: If you have a thermal camera you can see where air is leaking by scanning the ceiling for “hot spots”. These are areas where there is poor insulation.
What Are the Effects of a Mold in Attic?
Mold in the attic, including crawl spaces, is a problem. Mold can irritate allergies in some people and create an unpleasant odor in your home, and can potentially be dangerous to you or your family’s health. Left untreated long enough, mold can cause severe structural damage and expensive repairs.
How Does a Mold Problem Spread in the Attic?
Mold comes from spores found naturally almost everywhere: food, dirt, dust, even air. These spores reproduce by releasing tiny particles into the air that then attach themselves to surfaces to grow into new mold colonies.
How To Get Rid of Mold Growth in Your Attic Space
Luckily, there are a few tips that we can share that can be helpful for DIY mold treatments. The best time to tackle attic mold removal is before the infestation spreads across most of your living space (or any space greater than 10 square feet), otherwise, you’ll find yourself having to deal with more than one colony.
How You Can Prevent Mold Growth in Your Attic
The best option is to prevent attic mold growth altogether through a quarterly attic inspection with a home inspector.
Contact Your Local PuroClean Office For Professional Mold Remediation Services
PuroClean offers mold remediation services to stem the tide of mold, as well as cleaning, including addressing the source of your mold problems to restore your home to its pre-loss condition. Professional remediation of mold can be a serious endeavor, and PuroClean has the expertise and technology for the job.
What causes attic mold?
Mold is a type of fungus that thrives on moisture and reproduces through lightweight spores that travel through the air. Therefore in most homes, a mold problem is likely a moisture problem. You can’t have a mold issue without first having some sort of moisture issue.
How does passive ventilation work in an attic?
Attics generally have a passive ventilation system in which outside air comes in through eave vents, warms up the attic, then escapes through a can or ridge vent at the top since warm air rises. This creates a nice, breezy airflow for your attic – until your eave vents become blocked.
Why is my attic leaking?
In most cases, attic moisture problems are due to three different elements: blocked or insufficient ventilation, improper exhaustion of fans or dryer events, and roof issues or leaks. Let’s discuss each of these three issues so you can have a better understanding of how to fix a mold issue before it occurs.
Why is insulation needed in the attic?
Insulation prevents warmer air from entering a cold attic, as that causes condensation and moisture buildup. Check that there is insulation on and surrounding your access panel and your attic floors. Heating ducts and any empty space between the attic and other parts of the house (such as crawl spaces).
Why is it important to ventilate your attic?
Furthermore, properly ventilating your home and preventing mold from forming around ventilation in your attic will allow better overall air circulation. This will make your attic less stuffy in the summer, which contributes to a cooler house overall.
What is attic mold?
Attic Mold – What It Is And How To Deal With It. There are few places in the home that attract mold easier than the attic. They often have the perfect conditions for mold growth – hot or humid air, and an abundance of wood sheathing just waiting to grow mold. Furthermore, homeowners rarely check the attic and find themselves with ...
Why does my roof have a lot of water vapor?
During colder months, poor ventilation can cause the water vapor in the attic to freeze on the underside of the roof. This frost buildup is easy to spot and a clear indication of future mold.
What can I do about mold growth in my attic?
Technically, I recommend consulting with a qualified mold remediation contractor to deal with mold in attics. There are many out there- and bids vary greatly- so it’s important to do your due diligence. In my experience, mold remediation of most attics costs around $3000+-, depending on the extent of remediation and repair required. Try to get 2-3 bids if you can. It’s definitely a fixable issue that protects your investment in the home; the goal is to leave the attic in a state that’s desirable (no visible mold) to the homeowner and future home buyers. Visible mold isn’t desirable to anyone!
How to detect air leakage in attic?
This can happen at recessed light fixtures, plumbing vent penetrations into the attic and at interfaces between walls and ceilings in the home, for instance. Discolored insulation is a good clue for leaking air as insulation acts as a filter, becoming discolored in areas of air infiltration. Leaking areas can typically be caulked from within the attic to prevent warm, moist interior air from entering the (cold) attic where it may condense and create elevated moisture conditions conducive to mold growth.
How long does it take for mold to appear in a basement?
Whenever a buyer or homeowner sees mold- whether it be in a sink base cabinet, crawl space, basement, ceiling or attic doesn’t really matter- they’re very concerned about it. Under the right conditions, mold can present within twenty four (24) hours of a moisture event; yes, twenty four (24) hours! Identify the source (s) of elevated moisture, make necessary repairs, remove/remediate any visible mold and you should be good to go (mold stained sheetrock is typically replaced).
Why is my attic sheathing black?
If your attic sheathing doesn’t look like “new construction,” and is visibly black or white stained like this picture, you likely have a ventilation issue that needs to be addressed and mold remediated.
What vent vents discharge directly into the attic?
Attic Vent Ducting – Look for bathroom and kitchen vent fans’ ducting that discharge directly into the attic area; ducting should be extended to the exterior entirely. No exceptions!
What happens if your attic is tan?
If the attic is tan colored in the future, it will be obvious on future inspections that the issue has been satisfactorily addressed. If it’s tan , you’re good to go. If it becomes stained black or white, there’s still some work to be done. Some mold remediation companies warrant their work for a period of time.
Why do mold spores not have wings?
It’s due to the simple fact that warm air rises; in a house, this phenomenon is known as “Stack Effect.”. Air rises from the lower levels of the home and up through the attic. Mold spores don’t have wings, e.g., they can’t “fly” against an upward flow of air from stack effect within a house, so it’s extraordinarily rare for attic mold spores ...
