We bought our first home last July which has a fully finished basement, except for the utility room. We've had a couple of hard rains where water has leaked through the walls. There's also a window well where water collected and seeped through the window. Though no major damage has occurred, it's only a matter of time before the room floods. We're thinking a contacting a contractor to waterproof the utility room. I've seen waterproof sealants that you can paint on or spray on the walls but I don't know enough to know which ones to select. Should I contact a professional to waterproof our basement or should I do it myself?