Recent Mould Remediation Posts
Does Your Home Have A Mould Problem?
Untreated water damage can cause mould to grow quickly. Microscopic mould spores naturally occur almost everywhere, both outdoors and indoors. This makes it impossible to remove all mould from a home or business. Therefore, mould remediation reduces the mould spore count back to its natural or baseline level. Some restoration businesses advertise “mould removal” and even guarantee to remove all mould, which is a fallacy.
Consider the following mould facts:
Mould is present almost everywhere, indoors and outdoors.
Mould spores are microscopic and float along in the air and may enter your home through windows, doors, or AC/heating systems or even hitch a ride indoors on your clothing or a pet.
Mould spores thrive on moisture. Mould spores can quickly grow into colonies when exposed to water. These colonies may produce allergens and irritants.
Before mould remediation can begin, any sources of water or moisture must be addressed. Otherwise, the mould may return.
Mould often produces a strong, musty odour and can lead you to possible mould problem areas.
Even higher-than-normal indoor humidity can support mould growth. Keep indoor humidity below 45 percent.
If your home or business has a mould problem, we can inspect and assess your property and use our specialized training, equipment, and expertise to remediate your mould infestation.
If You See Signs of Mould, Call Us Today – (905) 864-9544
Understanding Decontamination Chambers
There are 2 types of decontamination chambers we typically add on to a contained and contaminated space:
- Clean Room - Where PPE is stored and workers suit-up (donning PPE)
- Pass Through - Where workers remove their PPE (doffing PPE)
We will typically use a combination of 1-3 decontamination chambers, depending upon the extend, degree, and type of contamination, also taking into consideration the available space, type of building, and the occupants. For example 3 chambers might be advisable when the occupants of the structure pose a higher risk for health effects (e.g. if somebody has asthma), while only 1 chamber might be called for when decontaminating part of an empty warehouse.
A Single Decontamination Chamber is a multi-purpose room used for donning and doffing PPE, as well as storage, double bagging, and other functions.
A Double Decontamination Chamber would include a Clean Room and a Pass Through.
A Triple Decontamination Chamber would include a Clean Room, a Shower, and a Pass through.
Each decontamination chamber would also be under slightly negative air pressure, compared to the adjacent chamber. We typically measure negative air pressure using a manometer, measuring relative pressure in inches of water, using the units of wc (water column). In order to maintain negative pressure, we would like each chamber to have 0.02 - 0.04 wc less than the previous chamber.
[Clean Room][Shower][Pass Thru][Contaminated Area]
[ -0.02 wc][-0.04 wc][-0.06 wc][-0.08 wc]
Dealing With Attic Mould
A very common call from realtors is to address mould found in an attic. This can get tricky. A typical situation is that a home inspector has been through, popped into the attic and noticed some visible staining on the sheathing. We often get the message that the inspector has identified it as mould and it needs to be cleaned.
Often the closing is contingent on this.
Many problems exist with this approach. First of all, it is a deviation form the IICRC-S520 Mould Remediation standard, which states that mould can only be identified by testing in a qualified lab. Unfortunately, many home inspectors overlook this, and identify what may or may not be mould based solely upon a visual inspection.
Nevertheless, the closing requires a clearance certificate and the only way to generate that is by following the standard: (1) Test for mould, (2) Remediate, (3) Test to confirm successful remediation (clearance). The length of time and cost of following the standard usually exceeds the time limit on the offer, so many deals fall through.
Our recommendation: have the property inspected prior to listing. If there are concerns about mould, deal with it beforehand. It could save you thousands in the long run.
Proper Containment Minimizes Spread of Contaminants
Properly erected containment, places affected area under negative air pressure.
As part of a mould abatement project, erecting proper containment is important to prevent spreading contaminants to other parts of the structure. There are 3 different types of containment we might use, depending upon conditions:
- Source Containment
- Local Containment
- Full-Scale Containment
Source Containment might be appropriate if there is a very small amount of mould, say less than 10 square feet. We would use 6 mil poly sheeting to directly cover contaminated surfaces, such as walls, minimizing disruption to the spores. We would use 6 mil poly bags to enclose contaminated contents. The objective is to secure and remove the contaminated objects from the structure so that they can be cleaned or disposed-of.
Local Containment is more complex and is used when larger amounts of mould are observed or suspected, say a surface area up to 100 square feet. Again, we use 6 mil poly sheeting, preferably with a flame retardant rating. Temporary walls are erected using the poly sheeting, typically with spring loaded poles, or even stud walls. The poly sheeting is secured to the walls with tape and spray adhesives, or even staples if attaching to unfinished wood. Once the containment barrier has been erected, the contained area is put under negative pressure using a negative air machine, which sucks air out of the contained area. The negative air machine is equipped with a High Efficiency Particulate Air filter (HEPA) to capture airborne particles.
Full-Scale Containment is used when an area >100 square feet is affected, or if an entire room or section of a building is contaminated. The methodologies are essentially the same as with Local Containment, however the scale is different. With Full-Scale Containment, there is also the consideration of filtering make-up air to the contained area.
September is Mould Month!
Don't let this happen to you!
Get $500 of Mould Remediation Labour For Only $125*
When you prepay our mould assessment package, you get:
- On-site mould assessment
- Detailed scope of work ($150 value)
- Up to $500 of mould remediation labour
Call us today: 905-864-9544
Or submit online: Contact Us
Want to know more about mould remediation?
* The fine print:
- Offer valid for September 2017 only.
- Services must be booked no later than December 31, 2017.
- Prepayment by credit card only.
- Credit applies to Mould Remediation Labour category only. Does not apply to other labour categories, such as carpentry, drywall, or painting.
- Supplies, chemical cleaning agents, equipment charges not included.
- Does not apply to lab tests or third-party testing services, such as an Industrial Hygienist.
- Does not apply to subcontractors, like plumbers.
- Valid in the GTA only.
Mould: Here Today, Gone Tomorrow!
Mouldy undersink inspection
Fungi & moulds grow naturally in the environment; they are a normal part of the decay process. In fact, over 100 thousand different kinds of fungi have been identified.
Water intrusions can promote mould growth. If the humidity and moisture levels in a water-damaged environment are not returned to normal quickly, mould spores may grow and multiply.
Organic materials found indoors, such as wood, paper, drywall, and some types of insulation provide food for moulds to grow and flourish.
Health Canada advises that small to medium patches of mould can be cleaned by the occupant, but should consider the help of a professional in situations of excessive mould growth.
We will always recommend seeking advice of an Indoor Environmental Professional (IEP) to provide independent testing to (1) Confirm the existence and spread of mould and (2) Confirm that it has been cleaned up correctly. Even if we suspect mould, we cannot formally confirm it without lab tests.