It's recommended to bleach and power wash prior to painting the exterior of a home. A primer/sealer should be used on any bare wood or masonry and on any chalky surface however if the surface is clean and sound, a good quality paint should adhere without a problem.
Primer isn't exactly necessary, it's more of a an added protection that make the materials you're painting resist wear and tear. You should use primer, it's high concerned considering you're painting the outside of a house, where it's exposed to the elements (sun, rain, snow, etc).
We just built a new house and I can personally tell you that it is a smart idea to use primer before you do any painting at all. Might seem like a step you could skip, but in the long run you'll be sorry. You will use more paint, and still will get a sparse coverage. Some people might disagree, but this is just my experience.
Yes, it is necessary.
A paint primer is the first coat put on a surface to ensure that the following coats of paint will adhere more closely to the surface. This is very common in house or automobile painting.
You can buy primer anywhere. Like walmart or hardware stores near you. If you want the best primer the best place to go would be like lowes or home depot.
In terms of painting one's house by himself or herself, one must remember to have a clean surface, use a primer, use right amount of paint for walls, and more.
There are variables such as old used house, or yours just repainting, have there been smokers in the house etc... also, how dark is the previous paint and how dark are you painting with? Primer seals in odors and allows you to paint over dark color paint. It is always advisable.
Different techniques used for painting fascia on a house include preparing the surface by cleaning and sanding, using a primer to help the paint adhere better, applying the paint with a brush or roller, and using multiple coats for a smooth and durable finish.
Latex.
The Yellow House - painting - was created in 1888.
You make sure your surface is clean and dry then roll the primer on. I prefer to use a heavy body primer like Kilz then I don't have to re-coat. One coat of a good primer does it all. Paying a little extra for a good primer can save you lots in the final paint.
Answer First of all, the White House was only heavily damaged by the fire. Doddly Madison, the first lady, was the one who saved the painting.