Any ideas on an affordable way to "carpet" a garage? (for a game room)?

Go to some carpet stores that have reminets of carpets. messure your garage and decide how much carpet that you would need mimuim or max. They have the carpet pieces maked for size and price. you can get large or small carpets and then glue down just the edges. You might have to visit more than one carpet store. My dorm room carpet last year cost $38.00 and was a12x22 room the carpet was 8 x16.

A couple of ideas with that.....I would suggest cheap outdoor carpeting......or even carpet ends that are usually discounted in stores. Also, I believe that Sears, or a store like that, has carpet squares that kind of fit together into a puzzle-like floor. They are not expensive and look fabulous!

When there are conventions or galas or other events in town for a weekend they usually use carpet for the weekend and then just throw it away because it is cheaper than lugging it to the next place. I know a couple of people that have gotten cheap or free carpet just for asking. And the people that gave it to them were grateful that they didn't have to tear it down or worry about throwing it away.

Many times you will find 'seconds' of carpet squares at home improvement stores. Picking up a couple of boxes for pennies on the dollar. You might also go to a carpet place and ask for any discontinued squares or rolls for a huge discount. Then get creative mixing and matching them on the garage floor.

Astroturf is very cheap and easy to work with. It doesn't need stretching and tacking either- just tape it down with carpet tape.

One thing you might want to do before carpeting is painting the concrete floor with appropriate paint. This will cut down on dust and dampness.