There are three principal layers; 1  External intercostal muscles aid in quiet and forced inhalation. They originate on ribs 1-11 and have their insertion on ribs 2-12. 2  Internal intercostal muscles aid in forced expiration (quiet expiration is a passive process).
Costs. A professional concrete contractor will typically charge $2-$4 per square foot for a simple stain application, including the sealer. A stain application with patterning and sawed lines will typically cost between $4 and $10 per square foot.
Stained Concrete Pricing - Interior Ver. 4.3. Thank you for visiting our Concrete Staining Cost page, we will go over some of the options that are available for concrete staining for interior floors and the pricing for them. First, let's make sure you are using the right estimator for your project, here's a quick primer on concrete staining.