I am soon to be a new home owner of a 70 year old home. The house I believe may have abestos shingles under the vinyl siding. I am led to believe this because in the semi attached garage you can see on the inside of the garage where it abutts the house you can see the existing abestos shingles. During our home inspection the inspector did not seemed surprised by this due to the age and said that we mainly did not have anything to worry about unless we were going to remove them as it would be costly. My father also stated the same thing. And that they are a good insulator. Now to the point of my question: While reading other posts trying to get ideas on some other things we have to do in the home. I have read some of the previous posts on Abestos Shingles. And now I am completely confused on what I should do about this? And if they are underneath the vinyl siding would this be a major problem? We are also planning to replace the front window we currently have to a bay window - probably larger than what is there now? Is this going to be a problem as well??