There are really not very many rules when it comes to the industrial look. An aspect which can add to the look of the finished product but doesn't necessarily take away from the ability to make a room unique is the building itself. Many well designed houses or offices using the industrial look make the most of the buildings so called rough edges and puts them on display giving a feel of rawness to the interior. In saying that it is not essential to reveal some of the building's original foundations, brick walls or wooden roof slats. Alternatively you can crate the look by the addition of furniture and accessories. There are a lot of pieces of used second hand lighting from train workshops, old restaurants etc available at flea markets and specialised secondhand furniture shops. The best thing to do is to choose something that is both practical to your living environment and at the same time fits into your interior. There are no restrictions here as most often the best things are the unfinished pieces that help create that yet-to-be-completed industrial look.
Some of the most effective and most commonly used materials are brick, steel and old used wood. The originality of this style is created in the combination of these materials, and many more. Seeing as though most spaces need to be practical and comfortable it is a good idea to break up the more industrial materials such as steel and bricks with some softer wood tones as it gives a warmth to the space and is more inviting which at the end of the day is one of the things most people are looking for in a home. Leather can be very overpowering but also can compliment if used in moderation other materials therefore it is a good idea to use darker shades of leather in selective spots such as in single arm chair or a leather box on a coffee table.
One of the great things about this style is that it is very much a work in progress so you are not left with a strain on your time and budget having to have it completed all at once. Your industrial interior can be added to with time creating not only a lovely space but also a story as bits and pieces are collected over time.