![]() ![]() While paint and primer in one is a fantastic advnacement in painting, it is not the ideal choice for painting over new drywall. This is because normal paints are not made to seal in new drywall. The color won’t look true to what you saw in the store and your paint won’t spread on nicely either.Įven worse, this will continue to happen coat after coat. The sheen will show differently over the drywall boards vs the taped joints. If you were to bust out your paint of choice and start rolling over new drywall, you would quickly find that your topcoat looks uneven. There are surfaces that don’t have any drywall mud, there are taped joints with loads of mud, there are screw heads with much and on top of that everything is sanded quite roughly. New drywall is a very uneven painting surface. NOTE: PVA is actually used in many different products such as glue. This creates a more uniform surface which you can then apply your topcoat onto. A PVA primer goes onto new porous sheetrock and seals the pores and creates a soft even coat over the top of the sheetrock. When applied over Level 4 drywall, these high-build products provide a Level 5 finish, which I prefer under dark or glossy paint and in harsh lighting conditions.Drywall primer is the common name for PVA primers (Polyvinyl acetate). For high-build primer/surfacers, I like PPG Speedhide MaxBuild and Sherwin-Williams High Build Interior Latex Primer. These products can fill sanding scratches, smooth drywall fuzz, and hide other small surface imperfections. High-build primer/surfacers can contain 66% solids by weight, and they go on thick, around 20 or 25 mils wet, which is equivalent to four or five coats of regular paint. nap roller, but rollers only make sense for small jobs because spraying is much faster. you also can roll on standard primer/surfacers with a 3⁄8-in. Sprayers this size are lighter and less expensive than the spray rigs needed for high-build primer/surfacers, which require larger tips (0.023 in. ft.), these less-viscous primer/surfacers can be sprayed with less-powerful sprayers because they require a smaller tip (0.015 in. Besides being less expensive than high-build versions (6¢ per sq. These products won’t produce a Level 5 finish, but they do a good job when applied over Level 4 finished drywall, and they can prevent joint telegraphing in many cases. My favorites in this class include PPG Speedhide Interior Max Prime and Sherwin-Williams Builders Solution Interior Primer/Surfacer. These primer/surfacers have fewer solids (more than 40% by weight) than high-build products but still more than a run-of-the-mill PVA primer, which can contain as little as 30% solids by weight. The difference is in how thick they go on.įor less-demanding applications, such as under flat or nearly flat paint and on surfaces that won’t get raking light, I use standard products that apply in a coat of about 4 or 5 mils. There are two basic types of primer/surfacers: standard and high-build. These solids create a uniform surface that reflects light evenly. But primer/surfacers cover better because they have a greater percentage of solid particles than PVA primer. Primer/surfacers are similar and include the same vinyl acrylic base that seals the drywall paper and compound. You may have learned that PVA primer is the right primer for new drywall. However, by using a modern drywall primer/surfacer, a crew of three or four painters can prep and spray the walls and ceilings of an entire average-size house to a Level 5 finish in one day for less cost. One common way to prevent telegraphing is to go the extra step to what the National Gypsum Association calls a Level 5 finish, which has traditionally been done by skim coating the entire drywall surface with compound. Known as joint telegraphing, it’s a problem I’ve seen a lot in the 20 years I’ve been a painter. The condition is worse when there’s raking light and when walls are painted with dark or glossy paints. This means that when the wall is painted, the seams look darker and have a slightly glossier finish. ![]() Even though the walls and ceilings look and feel smooth to the touch, the drywall’s paper surface and joint compound have different porosities. This is a Level 4 finish as specified by the National Gypsum Association. Most new drywall has three coats of joint compound on corners and seams, but much of the drywall’s paper face is left uncoated. ![]() By Philip Hansell Drywall primer/surfacers are the first step in getting the perfect paint job. ![]()
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