During the operation of the room with drywall walls on them can appear stains, mold or mildew. The impression of the repair can be completely ruined. Knowing the nature of the occurrence of these problems, it will be easier to solve it, using improvised tools and certain compositions, which you can prepare yourself or buy in specialized stores.
Causes of Mold Stains on Drywall
To the appearance of stains on drywall sheets can lead to the following reasons:
- Water leaks from the neighbors from above or malfunction of sewer pipes;
- Condensation or leaks from water pipes;
- Faulty ventilation system;
- Household Causes.
When stains are detected, you should determine the cause of the appearance and depending on the cause choose a method of elimination. If during the operation of any ceiling coating to pay proper attention to surface treatment and quality of materials, then the further use of the room with them will have fewer problems. To do this, you need to clean the ceiling before any type of finishing works, use special compounds that will protect the repair from damage.
How to Remove Black Mold From Drywall
To remove stains, a simple technique is used, to cope with the removal of the dark stain on the wall or ceiling will be easier if it has appeared recently. If external causes have led to the emergence of stains, it is necessary to deal with such a stain in a radical way. To completely eliminate the black mold stains requires not only knowing the cause of its appearance, but also take into account the type of coating. Stains can be removed from drywall using the following tools and solutions:
- Metal trowel and roller;
- Acrylic type primer;
- Gloves and a container under the paint;
- Laundry bleach or chlorinated solution;
- paint brush and paint.
Without replacing the drywall sheet, only those stains that have not seeped into the sheet itself are removed.
If the sheet has become corrugated, partially collapsed or crumbled, it is best to remove the drywall and replace it with new drywall.
Stains, like fungus, are removed from the surface using a metal spatula. Remove the top layer of finishing material. After removing the stain or fungus it is required to treat the surface with a chlorinated compound, allow the surface to dry and apply a primer. After priming, paint is applied.
Grease stains and traces from drinks can be removed using ammonia alcohol, it is applied to a sponge and applied to the damaged surface. After keeping it for 20-30 seconds, you should remove the sponge, repeat the procedure if necessary. Get rid of stains and fungus can be with the use of special compounds, which are sold in stores for repairs.
With embedded contaminants should be fought by another method: the contaminated surface is completely cleaned to the layer of plaster or drywall. The surface is treated with a degreasing compound and sanded down with a sandpaper. The damaged surface is primed, given time for drying – up to one day, and then a new coat of paint is applied. Detergents and surface cleaning sprays are used as a degreasing agent.
How to fight black mold fungus
If black mold has appeared on the walls or ceiling, it indicates an unfavorable microclimate in the room, which serves as a breeding ground for bacteria. Using the surface treatment method to combat mold is not possible, after some time it will appear again. Here the external cause is neutralized, which lies in the fact that the roof leaks or faulty internal communications – heating system or water supply.
If the roof does not leak, it is necessary to inspect the bathroom. The likely source of dampness in the room is a ventilation duct, which should be cleaned.
Treat the surface infected with mold should be treated with special compositions only after the complete elimination of the cause of mold. Here the plaster, if it has been applied to drywall, is soaked in water to the base and removed using a metal spatula. Adjacent to the mold in 1 ft radius is also treated with special compositions. Fights with mold copper sulfate or a special primer.
In the case if the sheet gypsum board itself is affected by fungus clean it will not work.
If black mold has affected the surface of the sheet, it is removed and replaced with a new one. Remember that mold can have a negative impact on health, drywall sheet is not so expensive to save on health.
Preventive measures
Black mold on drywall will not appear if you take preventive measures at the stage of repair. For this purpose, a reliable system of waterproofing of the ceiling and walls should be installed. Surfaces of walls and ceilings are smoothed and treated with special compounds.
In the process of operation of water supply systems requires systematic inspection and repair work. Ventilation system in the room should be serviceable, cleaning of the system is carried out annually.
If preventive measures to prevent black mold on the elements of finishing have not brought results, detergents and cleaners and special compositions for bleaching surfaces are used. If there are traces on the ceiling, minor repairs are made to the specific area to minimize costs.