Water-resistant drywall is simply not recommended for areas that are subject to constant moisture. Well, that is unless you think about doing what I've been doing for years.
Keep reading! The water-resistant green board drywall is sensitive to stud spacing. Yes, you need to use a vapor barrier with green board. In bathrooms or other wet locations, water vapor will try to penetrate into wall cavities. This will cause wood rot in cold climates. Some drywall manufacturers also state that a vapor retarder should not be used under the water-resistant drywall if the visible face of the drywall is covered by a product such as ceramic tile or other water-vapor impervious finish.
I believe they are very afraid that water might get trapped within the drywall and cause damage. I don't know that I'd follow this advice on exterior walls in a cold climate. Yes, you can make drywall pretty much waterproof if you coat it on all sides and edges with water-based urethane before you install it. After it's installed and finished, then coat it two more times.
The secret tip to making the drywall waterproof is to coat the paper surfaces of the drywall, including the edges, with clear water-based urethane BEFORE you finish the drywall. This coating soaks into the paper on the drywall so water can't get to the gypsum core and cause deterioration or the delamination of the paper from the core.
That's what happens over time is the paper rots away causing the failure you see. To get the best bond between the urethane-coated drywall paper and the joint compound used to finish the drywall, apply the joint compound within thirty minutes of rolling or spraying on the urethane. You'll get both a chemical and mechanical bond between the urethane and the glue that's in the joint compound. The bond will be nearly as strong as epoxy if you can do the applications back to back! Urethane is a great waterproofing coating.
This is why it's used on bar tops and hardwood floors that can get wet. Any part of the moisture-resistant drywall that's coated with urethane and then painted will do super well. Urethane is extremely sticky. There is a few reasons. I am talking about drywall that has soaked up the water and is saturated.
Biggest problem becomes mold. Drywall needs to be dried or removed as quickly as possible to avoid mold growth. Wet drywall that has been wet to long, will soak up the water like a blotter. As a result the drywall can become soft or crumble damaging the texture.
Wetter the walls, certainly the longer to get them dry causing mold. This is why you replace wet drywall. While many companies will tell you that you can dry out drywall. With the use of special equipment and many different methods.
I agree, you can save wet drywall if it only has light water damage. They also recommend removing baseboards to allow air behind the wall. This unfortunately does very little to help inside the wall. Removal of baseboard, is not of much use, in allowing air behind the wall.
Behind the baseboard you have the drywall, which may be raised a little off the floor. It does not expose any openings for air to enter behind the wall. Then if there is insulation or cross beams in the wall it further blocks any air flow. Due to the fact the air flow will be blocked preventing proper drying time mold and mildew will form. Removal of baseboard is only helpful to the outside section of drywall directly behind the baseboard.
Think of a wet rag in a sealed bottle with no airflow. For a better explanation see attached video and picture below. While the outside of the drywall gets an airflow and will dry fast. Inside the wall which is not painted, soaks up even more water than the outside.
To make matters worst the wall is sealed and gets no airflow inside. The interior walls should also have insulation in between which will restrict any air flow and reduce sound. Each section between the beams are like sealed boxes.
Water inside the wall, will take a very long time to dry, because of the lack of air flow. Another potential problem, termites love wet wood. Picture above is a wet rag in sealed bottle for 10 days with no air flow. It has been in the sun and in a air conditioned house and has not even begun to dry. Now do you believe the restoration companies when they say they can dry inside your walls?
You can do this test yourself to back up may claims. Just put a wet rag in a bottle and seal it air tight. Picture above is the same bottle, still sealed, and still wet, 10 months later. Your Email required. Your Message. Built using WordPress and the Mesmerize Theme. In This Article What is a dividing wall? Types of dividing wall Wet wall or Drywall Installation?
Types of dividing wall Dividing wall can be 2 types: fix dividing wall or moving dividing wall. Fixed dividing wall They install either by wet installation with mortar or glue or by the Drywall Installation by screwing onto a framework tools for drywall -plasterboard, honeycomb panels, etc.
The movable or removable dividing wall They are most often decorative. Easy to install, they can be quickly removed if necessary. They tend to damage easily compare to Fixed. Wet wall or Drywall Installation There are 2 categories of fix partitions: wet walls and Drywall Installation.
Wet dividing wall Wet partitions are usually construct of cinder block, clay or glass bricks, plaster tiles, or aerated concrete tiles.
Drywall Installation Drywall is partitions made up of facing plates fixed by screwing on a metal or wooden frame. Why drywall installer recommend to Install Drywall Drywall is designed without any binder, which makes it much lighter than other options.
The types of Drywall Installation You can find two types of it, each of which has its different advantages. Honeycomb panel drywall is the lightest. It consists of two plasterboards glued to a cardboard honeycomb. The drywall in the plasterboard offers better acoustic comfort. It is preferable to arrange a bedroom for example. How to install drywall It is not a hard process to install drywall. Screw the wall When the first screws are in place, tighten the others, starting in the center of the panel outward.
Leave space between floor and partition There should be a small space between the floor and the partition so that the panel does not get caught against the protrusions of the floor. Meanwhile, have a dehumidifier running in the room too. This should prevent any existing mold spores from spreading even further. You may want to keep these machines running for a day just to be safe.
New drywall will obviously need to replace the old drywall that was removed. Just be sure the contractors install a waterproof alternative to what you had before. Some contractors may install a drain system around the perimeter or a sump pump to prevent future water build up. It is incredibly important you take care of the damage right away or else it could lead to other issues like mold growth and mold damage!
If you need urgent help with anything from mold remediation to water damage from a licensed, trusted restoration company, we are available to help you 24 hours a day, 7 days a week. B, San Diego CA,
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