Attic floor insulation removal and upgrade

[Girves]

Hi I am new member .The question is:
How I can identify the correct insulation for example Interior Wall R 13
Exterior Wall R19 ,in which situation use Kraft insulation
Thank for your help Carlos

[Matthew.Mobley]

I am intrigued because this is the issue I raised in my first post on JLC years ago. Rodent infestation seems to be inevitable. I agree with Doug's post. I also think all houses get mice. Rats are different story. If you build a house that attracts rats, you did something wrong. Mice can get into any hole you can fit a pencil. This is a good rule of thumb for building.

If you can build a house that resists mice, you are better than me.

[Dick Seibert]

Actually it is a Deer Mouse that is being blamed for getting into the insulation.

The pathogen is carried by a common species of deer mouse known scientifically as Peromyscus maniculatus. The virus doesn't make mice sick, but humans can catch it by inhaling airborne particles of mouse feces and urine that accumulate in dust. Mouse saliva also contains the pathogen, so people can conceivably get the disease after being bitten.

Flu-like symptoms begin one to six weeks after exposure and quickly progress as the chest cavity fills with fluid, causing breathing difficulties. The pathogen has killed 36 percent of people known to be infected.

Read more: http://www.sfgate.com/health/article...#ixzz2G7emi06P

There is a map of the United States in the link above showing the prevalence of hantavrius nationwide. "Rat" is used by the con-men going around selling insulation removal. After the crisis is over some of the same shysters will be back selling insulation replacement.