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.
Cost of Staining Concrete. Time: 01:56. View all concrete floor videos. The cost of staining will vary considerably depending on the complexity of the stain application, surface prep requirements, the size of the job, the type of sealer used, and your local market.ven if the stained surface wears after time, it can often be brought back to life with some touchup staining and reapplication of the protective coating. 1  It is usually much more cost-effective to stain new concrete that has not been sealed or previously covered with another flooring material.