Killing Mildew on Drywall Killing Mildew on Drywall

What You'll Need
Clorox solution
Stain Blocker Primer
Cleaning Sponge
Dry cloth
Keyhole saw
Scrap piece of drywall sheet
Wooden board
Wallboard joint compound glue
Flathead screws & screwdriver
Gloves & Protective Goggles

Killing mildew is considered one of the most arduous jobs to undertake on a drywall surface. However, it is one of the easiest tasks that could present themselves in a household when one uses the correct tools. Many a times it is advised to remove and re-patch the drywall areas attacked by mildew but this is a huge commitment especially considering that mildew and mold are way too frequent in certain areas of the house. Yet, there are very simple methods to clean and kill mildew.

Step 1 – Assess the Damage

The first thing you will be doing is to assess the damage. It is important to make sure if the mildew is on the surface only or if it has penetrated the trusses.

Step 2 – Clean the Surface

To do so you will be using Clorox solution mixed in equal parts with water. Dip the cleaning sponge into the Clorox-water solution and then squeeze it to remove access solution. Make sure that you wear protective eye goggles and gloves to avoid contact with the bleach solution. You can now clean the mildew spots by scrubbing with the sponge. Perform this cleaning task, two or three times in order to remove and kill all mildew on the surface. Make sure that the sponge is not saturated with liquid because that will only fill the wall with even more water and you will be practically creating a home for even more mildew to grow. Once you have cleaned the surface, dry it as much as you can with a dry cloth.

Step 3 – Removing Rotten Areas

After cleaning the wall you should wait for a couple of days to see whether the mildew resurfaces. If the mildew shows up again it means that the problem is deep and that it has attacked the drywall itself. At this point you will have to isolate and remove the rotten area. You have to cut out the affected section after taking its measurements in order to be replaced later.

At this point, cut out the marked rotten area with the help of a keyhole saw. You will need some sort of support to keep the scrap piece in place. For this purpose, you will be using a wooden board that is 6 inches longer the patched hole. Slide the wooden board on the inside of the wall and keep it in place by using flathead screws. After securing the support, you can now glue the new piece of drywall with the help of wallboard joint compound glue.  Ideally, you should let the compound dry at least overnight.

Step 3 – Finishing Up

Now that the mildew has been properly addressed, you can cover up the newly patched up area. First, use the stain block primer on the area to avoid any stains. You can also add mildew resistant and watertight caulk before the primer to avoid future problems in the area. You now should cover the joints and screws with the joint compound, prime the area and repaint it if necessary. In order to help it dry quickly, you should leave an open window to help air circulation.

This is one of the easiest ways to kill your mildew. If the mildew problem is too big to take care of yourself or if the mildew is toxic, you should call in a mold remediation professional.

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