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Installing Mold-Resistant Fiberglass Drywall

John McEvoy of Thorough Construction is leading the crew for the drywall installation. They have chosen DensArmor Plus, a 5/8-inch fiberglass-faced drywall from Georgia-Pacific. Eliminating the paper or organic materials from the drywall makes it mold and mildew resistant. The thicker drywall will make for stiffer walls, especially since they are so high, at twelve-and-a-half feet throughout. McEvoy decides on a vertical installation since the boards are exactly four feet wide, which will make for less cutting and fitting. He shows how corners are made with steel studs as the first piece of drywall slides into the corner pocket, a metal stud is secured in front of that, and another sheet comes in at a 90-degree angle to be nailed onto the studs in back.

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Clip Transcript For:

Installing Mold-Resistant Fiberglass Drywall

computer-generated transcript - may not be 100% accurate

" We are about to talk with Jonathan stuff about. The the drywall installation already but first let's look a little bit closer at the use this product that we use Hillary reusing -- Georgia Pacific densarmor plus it's a five eighths inch. And basically what's different about this is that it's got an inorganic glass matte facing so it's kind of got a fiberglass. On both sides instead of paper which will be generalists yet normally on drywall you'll see paper -- and what's not just some in the middle but what's different about this is that if you eliminate the paper you're taking away the food for little organisms to eat and cause I know I grew mildew. Mold things like that and that's the whole point is is to cut down on the growth of mildew and again five eighths is. Unity in a quality job you -- at -- a half -- reason to five it's just a stronger. -- stronger situation and what we've got here is twelve and half foot ceilings bring that to. You know. Makes it a good idea to stiffen everything is -- join us that this Jonathan are you really installing them vertically. Yet when a friend Nathaniel -- home that's sensed before things. I don't know what on the Martha Cohen but I think my fourth place OK so forth it works just as well we used to seeing horizontal installations. In residential. Good. Construction and yet this is. -- presidential but it's almost. Almost industrial wood -- kind of ceiling heights. Now the metal studs. So little bit confusing is different from wood framing metal studs in the corner. Jonathan you just kind of run this sheet straight into the wall pocket sure sure and then what happens next when you put on his boxers and just to -- against us and just types who want got a program strong arm but it was widely -- that. We talked to him to -- Course five eighths thickness makes for a little bit heavier package. With a look ahead. And the old plumb Bob comes into play here rather than just the total. -- Columbus center entry it so constraints to ensure its own -- just means that the -- come. And that's going to be a true straight up and down vertical absolutely positively certain. OK so now another vertical one comes in to form the right angle. It's very. And he's going to market offers time pencil. And it's going to put affecting our tolerance sometimes. That's especially important when you're working again on twelve foot high."

" Okay purposes."

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Drywall Install Tips

Here s another great tip from BobVila.com. Although the two words are often used interchangeably, sheetrock is actually a brand name for drywall, which is gypsum sandwiched between two sheets of paper or, more recently, between two sheets of fiberglass. Any way you say it, drywall makes finishing walls very practical. For large jobs or those with very high ceilings, hire a pro. But most smaller jobs can be tackled by do-it-yourselfers. Before you get started, run the side of a hammer head along the framing to check for uneven surfaces or any protruding staples or nails. The tools you ll need are a straightedge and measuring tape for sizing your pieces, a utility knife for scoring and snapping, and a keyhole saw or rotary tool for cutting holes for outlets and windows. While some pros still attach drywall with nails, most find it easier to use an electric drill and that wonderful multi-purpose fastener, the drywall screw. You ll need about a pound of nails or screws for every 5 sheets of drywall. Metal corner beads go on all outside corners; inside corners get taped along with the joints between panels. Using pre-mixed joint compound is easier and less messy than mixing your own. You want a mix that s not too quick-drying if you re a beginner so you have a grace period to work in. Pros use about 5 gallons of compound for every 100 square feet, but you may need more depending on your level of experience. Installing drywall involves a series of short steps over a 3- to 4-day period. Follow the steps on BobVila.com for taping and finishing joints, and be sure to wear safety gear and a dust mask while sanding. If you re doing a ceiling, get a helper or a drywall lift. Find out more at BobVila.com: the ultimate home improvement web site! 2008 BobVila.com

Drywall vs. Blue Board Explained

Bob meets up with Bill Reid of US Gypsum in the barn of the Medford project. Bill differentiates imperial board (blue board) which is skim coated from drywall (gypsum panels) where the joints are taped. In 2000 US Gypsum developed a new core technology that makes the boards stronger and lighter - for easier handling, cutting, and scoring. The screw spacing is 12 inches on center with the screws flush with the paper providing a good, solid adherence to the wall with the screws. The face paper is treated and absorbent to take the veneer plaster and create the bond. These new boards snap cleanly on the ends. The installer puts a back cut on the edge so that the back of the sheet doesn't hit before the front does. The blue board and skimcoat application is typically not a do-it-yourself project. Traditional plaster jobs were very cost prohibitive so, when veneer plasters came along, they became very popular as they give a much more monolithic look than gypsum panels while providing an abuse resistant finish. Upstairs in the studio the homeowner has specified blue board with veneer plaster and downstairs, where he wants the option to tack artwork to the wall, he has specified a traditional drywall and tape application.

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