The way you deal with water damage to your drywall walls will depend largely on a number of different factors. The first thing that must be determined is the amount of water involved in the damage, the more water damage there is affecting the drywall the greater will be the repair required.

The sort of water involved in the drywall water damage will also play a big part in the action you will be required to take. There are three standards that measure the cleanliness of the water that has invaded your home: black, grey and clear.

Black water is highly polluted water, usually involving sewage contamination but can also contain pesticides or toxic organic substances. If your drywall is affected by black water you will have to completely replace the wall and very likely the supporting structure underneath as well.

Gray water can carry microorganisms that are harmful to the health, possibly causing illness. Gray water may come from dishwashers, washing machines or sump pump failures. Walls that are affected by gray water can be treated without having to resort to complete wall removal.

Clear water damage usually originates from leaky pipes, rainwater or sink overflows that do not contain contaminates. Drywall water damage that involves clear water can be treated without having to remove the drywall.

Drywall Water Damage Repair

Drywall that has been affected by water damage will become quite noticeable very quickly because the paper backing tends to bubble or wrinkle. It should be repaired after first identifying the cause of the initial water damage. There’s no point in repairing a water damaged drywall without fixing the source of the leak because within a month or two you’ll find yourself back exactly where you started.

If the water damage is not extensive you should simply cut out the affected area of drywall in a square or rectangle shape. Neatness counts at this point because you are going to be replacing the damaged drywall with a new piece.

Once the water damaged drywall piece is removed check the wall cavity for signs of water or, if there is insulation in the wall, test the insulation to see if it is wet. If the insulation proves to be wet, you will have to remove and replace the insulation as well, which may require a larger hole.

Once you have satisfied yourself that the wall cavity is dry, cut a replacement piece of drywall so that it is a snug fit. It may be necessary to install a backing piece if timber behind the drywall hole, screwing it to existing studs to support the new piece. Secure the new piece of drywall in place and tape the seams applying plenty of plaster over the top. Allow the plaster to dry before sanding back and finishing it to match the rest of the wall.

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