On average, it takes three days to completely dry wet drywall.
Regularly check the dehumidifier's collection well, and reposition the air movers as necessary throughout the process to be sure to get everything. Use your moisture meter to track your progress. It takes around 3-5 days to completely dry wet drywall, so patience is key, but you should be seeing consistent progress.
It takes about 72 hours for any affected areas to completely dry-up; this only applies to a room to room basis. Larger areas affected by water damage need longer drying times. Regardless of how large an area was affected, you need to follow specific protocols to restore your home's interior quality completely.
Once exposed to water, the paper backing becomes saturated and begins to swell. As soon as this happens, the panel starts losing its structural integrity. At this point, the only way to save the sheetrock is to replace it entirely.
Within just a single hour, drywall can bulge and break. Furthermore, metal surfaces may begin to tarnish, and your furniture may swell and crack after one day of water exposure. By the end of the first week, the damage compounds. The mold will have already grown and started spreading.
Make the room as airtight as possible by taping plastic sheeting over doorways and windows. Fire up the equipment, keep a close eye on the dehumidifier's collection well, and regularly check progress with your moisture meter. On average, it takes three days to completely dry wet drywall.
mildew and mold will develop within 24-48 hours of water exposure. Even worse, it will continue to grow until steps are taken to eliminate the source of moisture, and effectively deal with the mold problem. Use the diagram on the facing page to assess the extent of mold in your home.
Even though drywall is pretty sturdy, it can be significantly damaged if it gets wet for too long. If moisture damage isn't handled right away, the drywall's structural integrity will be compromised, causing it to become soft, weak, and mold-prone.
Here's what to do if your drywall is exposed to water: Try drying the wet spot with an absorbent towel to remove water from the surface. Point as many fans as possible to the wet area to help dry out the air. You can also use a dehumidifier to remove excess moisture from the room.
Wet walls and insulation will hold moisture for a long time. This means that mold clusters can form inside the wall. If your drywall has started to mold, you will need to replace all or part of it. You want it out of your home as quickly as possible, as water damage will only make matters worse over time.
You can enhance drying and evaporation efforts further by feeding air movers blowing into the wall with a dehumidifier, or warming wall surfaces with direct heat. In order to reduce the need for extensive repairs, it is usually best to remove the baseboards and drill into the wall at the floor level.
Use fans to move air around the damp walls. Also use dehumidifiers, which can help remove moisture from the air and walls. Professionals use tools like moisture meters, infrared imaging devices, dehumidifiers and heavy-duty fans. That ensures the walls are truly dry before further repair, painting or refinishing.
Clear, Air, Replace
Second, get as much air circulating around the affected spaces as possible. Leaving windows open will help to remove moisture from the air in a room, which will then make the natural drying process more efficient. This can be sped up using fans and/or dehumidifiers.
Drywall mud can take as long as 24 hours to dry for thick applications. The 24-hour drying time recommendation can be applied to nearly all factors. Some manufacturers will bring down that number to 12 hours if a few shortcuts are applied to help speed up drying time without affecting the finished product.
Extensive water damage is obvious to see. 'Look out for large holes, leaks or sagging in the ceiling, says Adam Graham, construction analyst at Fixr. In this case, the ceiling would need to be fully replaced, including structural elements such as beams'.
Mold From Water Leaks
Leaking water doesn't just happen when something big like a pipe bursts. Something as simple as a dripping faucet going unnoticed for months can cause a leak. While the water damage won't always be apparent. It can still cause mold to grow inside walls or under flooring.
Additionally, if left untreated, water damage on walls can cause the surface to crack, peel or buckle. This can create both cosmetic and structural issues. Water damage can also give host to mold and mildew. That's why repairing water-damaged drywall in a timely manner is best.
To cover water stains in drywall, begin by using a paint scraper to remove loose and peeling paint. Next, start sanding the wall with medium-grit sandpaper, and sand with progressively smaller grit until the surface is smooth. You can then prime and paint the surface of the drywall when it is free of imperfections.
Musty Smell
If you think there's mold in your walls, get on your hands and knees and smell the electrical outlets. This might sound silly, but it may help you sense mold if it's growing within walls. Outlets have better access to the area behind the walls. Thus, smelling them can help identify the mold problem.
Any water leak carries the risk of mold growth, but that doesn't necessarily mean that mold growth is certain. The chance of mold depends on many factors, such as the severity of water damage, how quickly it was cleaned up and dried, and the extent of surfaces affected.
Yes, mold growth can occur even after a leak has been fixed. While addressing the source of moisture is a critical step in preventing mold growth, it doesn't guarantee that mold spores won't take root. Mold spores are ubiquitous in the environment and can remain dormant until they come into contact with moisture again.
Determining Water Damage to Drywall
However, if the drywall gets soft and smushy, then it's very likely the gypsum will crumble and the paper will separate when the area dries. In that case, you'll need to cut out these water-damaged sections as soon as possible.
Given the right humidity and temperature levels, usually, plaster jobs should dry within: Small patchwork and repairs: 1 week. Plaster on plasterboard for whole walls: 2 weeks.