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Q: Is drywall toxic to the environment?

• <div><p>Drywall can be toxic to the environment and to humans in some cases. As drywall breaks down in a landfill and comes in contact with other organic chemicals, it can create hydrogen sulfide gas or leach into the groundwater. Additionally, the <a href="https://www.cdc.gov/niosh/docs/99-113/default.html">CDC recommends</a> methods for controlling the inhalation of drywall dust when handled. While the common ingredients of drywall&mdash;gypsum, silica, and mica&mdash;are naturally occurring, they can cause irritation in some humans. </p></div>

Q: How long do asbestos fibers stay in the air?

• <div><p>Asbestos fibers can stay airborne for 48 to 72 hours, depending on the home's ventilation. Fibers can linger longer in enclosed spaces with poor airflow. Because the fibers are microscopic, they can easily remain suspended, making them difficult to detect without professional equipment.</p></div>

Q: How much does mold inspection cost?

• <div><p>A <a href="https://www.angi.com/articles/mold-inspection-professionals-and-costs.htm">mold inspection costs</a><b> $660</b> for the average homeowner. This cost can range anywhere from <b>$150 to $2.800</b>, depending on the size of your home, the number and type of samples, and the number of hard-to-reach areas of your home that need testing. </p><p>Places like air ducts, crawl spaces, and wall cavities are particularly inviting for mold spores but require more time from your mold inspection pro. Additionally, swab testing, where a surface sample from an area of your home is collected, generally costs<b> </b>$200 to $300 per area. Air testing, however, is more costly, ranging from $250 to $350, but can cost as much as $700. </p></div>

Q: How do I find the source of the moldy smell in my house?

• <div><p>You can find the smell of mold in your house in two ways: following your nose, and using common sense tactics like looking anywhere there&rsquo;s water first. Mold cannot form in a completely dry environment, which is why you see mold much more often under kitchen sinks than on garage floors. If you have looked everywhere and still can&rsquo;t find the source, <b>hire a pro</b>, because you may have mold in your walls.</p></div>

Q: Can I use bleach on the mold on my aluminum siding?

• <div><p>Yes, you can use bleach to remove mold from your aluminum siding, but it&rsquo;s a powerful cleaning agent, so make sure it&rsquo;s diluted with water first. A solution of one part bleach and four or five parts water works well. But it&rsquo;s still a good idea to start by cleaning a small, inconspicuous area of the siding to make sure that the solution doesn&rsquo;t cause damage or discoloration. </p></div>

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*The Angi rating for Mold Testing And Remediation companies in Gresham, OR is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Mold Testing And Remediation needs.

*The HomeAdvisor rating for Mold Testing And Remediation companies in Gresham, OR is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Mold Testing And Remediation needs.

Last update on January 20, 2026

Reviewed in April 2025
PDX Environmental was great to work with at all the stages, from getting the quote to having the work done. We had mold in our kitchen, and then testing revealed there was asbestos in the joint compound. PDX Environmental did the mold and asbestos abatement as they demoed our walls, floors, and...
PDX ENVIRONMENTAL SERVICES, LLC
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Reviewed in October 2024
Sean exceeded my expectations, got my driveway looking new.
Clean Sweep Lawn & Leaf
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Reviewed in September 2024
It went wonderfully. Very studious and very polite to the point that he got everything on time. Very knowledgeable.
Quality Septic and Excavation, LLC
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Reviewed in May 2023
Friendly and professional crew. The scope of work was done efficiently and on time.
Kornerblock Construction, LLC
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Reviewed in December 2022
Worked with our budget and did a great job. Able to do additional things like crown molding and wall patching. Listened and checked in with all our needs. Such a transformation!
Hevers Fine Touch Painting LLC
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Reviewed in September 2022
They have done a terrific job these past few months and we plan to continue to use them indefinitely!
Magenta Clean
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Reviewed in May 2022
My free standing gas stove was not receiving signal from the remote control. Kevin was an outstanding repairman and we would hire this company again. Very prompt service.
Refiners Fire Services
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Reviewed in December 2021
Exceeded my expectations! Randy communicates very well, explains all the options, gives worst and best-case scenarios so that there are no surprises. This is hard to explain, but I felt like he was working for me, not just D & F. He understood my situation completely, and completed the job, with...
D & F Plumbing, Heating and Cooling
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Reviewed in September 2021
They ensured that they got all the mould. They were polite, thorough in cleaning up, and explained things clearly.
Armored Restoration
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Reviewed in August 2021
Sean and his team did an amazing job in our renovation project. We needed to update our kids bathroom because 1 sink for 3 kids wasn't working. The team did a great job replacing the cabinets and having 2 sinks put in. We also enclosed a loft are to provide more privacy for an office. ...
BOSS PDX, LLC
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