Over the years we have searched long and hard for a solution for mould removal from porous building materials such as concrete, timber frames and sub floors. In this article we will explore the options for mould removal from the following :
- Flood Damaged Brick and Timber
- Mould Affected sub floor
- Timber Frame Mould Removal
Originally this work was extremely labor intensive and involved many hours of hand scrubbing and moisture added. Of Course the addition of moisture doesn’t help things.
Currently most professional operators would choose soda blasting as the best method for removing mould from flood damaged building marterials and home sub floors. Below we will compare the different options and see why soda blasting is the method of choicce
Mould Removal with Abrasive blasting
- Grain Dust or Wall nut Shell Blasting – Excellent method which can work but leaves residue which needs to be cleaned after remediation.
- Dry Ice Blasting – Fantastic method as the residue from blasting is disintegrated into the air
- Soda Blasting – Another great option. It is a little bit dusty and hard to deal with but could be a suitable application.
Lets look into it a bit closer
Dry Ice Disadvantages
- You have to be very good at estimating the amount of blast media used. After the job is complete you have to use the left over dry ice will only last so long.
- An Oxygen monitor is needed as the operator can be poisoned by carbon dioxide
- Tansport costs of dry Ice is higher and takes more care
- OHS risk caused by the operator. Dry Ice can cause burning
- Although there is no residue left by the dry ice blasting process, the mould still needs to go somewhere. Essentially there is still an element of capturing the dust and containing it.
- It is more abrasive process then soda.
Soda Blasting Advantages
- Smoother appearance on wood and timber frames
- Soda has a natural deodorization quality
- Soda also has antimicrobial qualities
- 3 x faster than the speed of dry ice
- Blast media is 1/3 the cost of dry ice
- Soda has a 8.3 – 8.4 Ph meaning it is slighly alkaline which is useful for cleaning
- Softer blast medium
- Soda residue will stay in the subfloor after blasting and will disintegrate over time.
Soda Blasting Disadvantages
- Soda is harder to contain. Very dusty
- Soda is high in PH meaning it can kill surrounding grass and plants. Containment is needed.
So What is the better option?
I personally thing soda blasting is a far cheaper and better options.