DrBill100
Jan 14, 2011, 10:26 PM
I encountered an amazing interior wall system while cutting into a kitchen wall (backed to the bathroom). A wet wall 6" studs. House 60-70 yr old. Obviously original construction.
The interior surace is 3/4" thick but composed of two layers. The inner-most layer is a lighter grey, the outer-most a darker grey (concrete color). These two layers are clearly laminated together (not one installed over the other).
Broke a hole with a hammer, and using a new demo-blade in a reciprocating heavy duty saw started to cut straight down. Stripped the blade in six inches. Thinking I had a bad blade tried again. Six inches and the teeth were leveled. Broke the rest out with hammer but kept a section to analyze.
The innermost section is light grey (similar to drywall, ), there are dark specks in the material of both but more in the darker grey. There are highly reflective specks, like glass bits, embedded in both but most in the darker concrete looking layer.
I have never seen anything that will destroy blades like that. Never seen a 3/4" laminated wall.
Job done but need some advice here.
What is this material(s)?
The interior surace is 3/4" thick but composed of two layers. The inner-most layer is a lighter grey, the outer-most a darker grey (concrete color). These two layers are clearly laminated together (not one installed over the other).
Broke a hole with a hammer, and using a new demo-blade in a reciprocating heavy duty saw started to cut straight down. Stripped the blade in six inches. Thinking I had a bad blade tried again. Six inches and the teeth were leveled. Broke the rest out with hammer but kept a section to analyze.
The innermost section is light grey (similar to drywall, ), there are dark specks in the material of both but more in the darker grey. There are highly reflective specks, like glass bits, embedded in both but most in the darker concrete looking layer.
I have never seen anything that will destroy blades like that. Never seen a 3/4" laminated wall.
Job done but need some advice here.
What is this material(s)?