All concealed spaces need to be checked for extension. Gas powered fans produce carbon monoxide and breathing apparatus may be required when PPV is used during overhaul operations. The more critical the fire, the less important forcible entry damage becomes and vice versa. The provision of access many times will determine if the fire is cut off and extinguished or not. Beware of the premature access efforts, such as opening of doors, holes, etc., before lines are placed and crews are ready to go inside.
Good timing requires effective communication between engine and ladder companies.