The number one used paint type by builders is flat latex. Some use semi gloss paints to accent wood trim such as banisters and doors. Priming the new drywall is critical. The surface of new drywall is made of recycled papers. There are pores in the paper which require sealing to level the porosity of the surface so that the paint, which adds color and durability, will dry even and be free of minor defects.
We recommend priming with LevelCoat by Mangum if you have a heavy duty paint sprayer otherwise Zinsser Bullseye.
Many builders use flat latex paint because it hides flaws in the drywall and is easy to touch up.
Lowes.com and truevaluepaint.com have good information on paint types. Also check out www.house-painting-info.com.
Priming new drywall is critical. We recommend LevelCoat by Magnum or Zinsser Bullseye. Your painter will have good recommendations as well.
The moisture in drywall mud dries in two directions. In new drywall it dries back into the drywall itself and out the front of the mud. If a wall has existing paint on it the moisture does not pass through the paint, therefore it goes out the front and can cause tiny air holes.
When the mud is sanded the air holes are filled with dust. When you paint it you remove the dust and the holes show up.
We sand the surface, blow out the dust, then put a very tight skim coat on and sand that 10 minutes later.
I've found the problem while painting and took a brush to press more paint in the area where the holes are. I waited a few minutes for the paint to start to thicken up from drying and then rolled over the surface.
There are two main reasons you might see a drywall seam in a wall. Flashing or a poorly finished seam. Flashing is caused by a difference in the porosity of the surfaces. In other words, the drywall mud on the seam has different pores than the drywall paper.
Flashing shows up when indirect lighting shines across the surface like from a window when the sun comes through or you turn on an overhead light.
Alliance Drywall suggests good primer or better yet, let us use our primer which is Level Coat by Magnum mud. It destroys any chance of joint flashing caused by porosity of the surfaces.
Seams should be finished with a 12" knife and be flat. If they are not, you may see the seam. Bad seam locations are often the bathroom because of the large amount of lighting or a tall wall where sunlight shines across it. Going down the stairwell to the basement or a long hallway are other good places for bad seams.
There is a slight chance the bottom seam, such as a stairwell or taller wall, will show up because of "roping". By this I mean the drywall tape and mud on the lower seam moves ever so lightly due to downward pressure from the drywall pushing down from above.
You can also help by using at least a 3/4" nap roller when painting. This puts more paint on the wall than a 1/2 roller and adds a slight texture to the wall.
Or, just hang the curtain on the window and the seam will go away.
What may be happening is the mud over the corner bead has shrunk back after drying. This is called checkering or photographing. Alliance Drywall Services uses the No Coat System. This is a high impact corner which has drywall type tape bonded to it. It withstands severe impacts, settling and seismic movements without cracking, denting, chipping or peeling. The material costs more but you save on the labor side.
No Coat has tapered edges, metal does not. Metal requires more mud to feather the edges out. With more mud comes extra drying. Sometimes mud on metal corners can shrink back and show a faint outline of the metal underneath.
Conventional drywall tape and other products for corners are used by our competitors because they cost less. We think our products and installation methods perform better and can be used at any budget point.
Conventional metal, for example, may crack because it is only attached to the drywall underneath in a few places at at best, has tape over it.
Alliance Drywall Services uses the No Coat System on our corners. No Coat withstand severe impacts, settling and seismic movements without cracking, denting, chipping or peeling. Easy to install lengths deliver perfect drywall corners in record time.
We don't break the law and therefore do not hire illegal immigrants. We stress this to our sub-contractors as well. Although we do not control whom our sub-contractors hire, we are considering a new sub-contractor agreement which states we do not allow illegal immigrants on our jobs.
We are also not a company who thinks that just because you are Hispanic that you must be illegal.
Our sub-contractors and employees have verified social security numbers.
It is hard to sit back and watch so many of our competitors break the law to include cheating as to who is an employee and who is a contractor to avoid taxes, hiring illegal works and paying them less than they should be paid and not having the proper workmans' comp. insurance which is required by law if a construction contractor has one or more full time employees.
Alliance primed the walls in this basement with Level Coat. It's three to five times thicker than paint and cost the same as good primer. It levels the porosity of the surface and takes paint very well. Alliance spent two years learning about the product and testing it before we were able to offer it as a service. If you have dark colors or are using anything but flat paint you had better tell the painter to prime the walls.