You sure it is tar paper? I don't know about the building code in your area, but it would seem funny to have tar paper underneath tile?

You sure it isn't a tile adhesive that may contain asbestos?

Tar paper should scrape off easily, without heat. Adhesive would require something more dramatic - and I'd be wary about potential asbestos content.

Just my $0.02.

__________________
Chris
2007 E550 4Matic - 61,000 Km - Iridium Silver, black leather, Sport package, Premium 2 package
2007 GL450 4Matic - 62,000 Km - Obsidian Black Metallic, black leather, all options
1998 E430 - sold
1989 300E - 333,000 Km - sold
1977 280E - sold
1971 250 - retired

"And a frign hat. They gave me a hat at the annual benefits meeting. I said. how does this benefit me. I dont have anything from the company.. So they gave me a hat." - TheDon