Paint manufacturers have recognized these problems and have come to the rescue with new solutions. But a word of advice: If your garage floor sees heavy water leakage, if it's badly cracked or if it's damp and slimy all summer, don't apply any coating. In those cases, you're better off simply keeping it as clean as you can and then calling it quits.
Garages have minimal insulation, so if you’re renovating your garage to turn it into an office or family room, you’ll certainly need to add insulation and HVAC. Your insulation pro will start with the ceilings and floors. Beyond that, they may or may not choose to add insulated garage doors (if doors are being kept). All in all, adding new HVAC and insulation can add $2,000 to $3,000 to your garage remodel cost.
Start by insulating the walls. Buy unfaced R-13 batts for 2×4 walls and unfaced R-19 batts for 2×6 walls. Match the width of the batt (15-1/4 in. or 23-1/4 in.) to the stud space. Cut batts carefully for a tight fit. Next, staple 4-mil poly to the walls and ceiling. Embed the poly sheeting in caulk around the perimeter of each piece to create an airtight seal. Seal the seams between sheets and seal the poly to electrical boxes with caulk or special sheathing tape (it’s typically red and looks like packing tape).
Purge: Look at your pictures, think of them in terms of a small space. Purge anything that doesn’t work in a small space. With minimal square feet to work with, you don’t need a spa bathroom. While a game room sounds great, the space needed for a pool table is probably not there. Take out anything from your plan that doesn’t fit in a smaller space.
For those searching for more room when you decide to remodel two spaces come quickly to mind. These are your garage and your attic. Both have benefits and drawbacks as far as conversion to a bedroom or usable space goes. It is a bit more easily converted than your attic and can result in a beautiful living space. Before you begin work you should know the real garage remodeling costs involved. Converting your garage to a bedroom requires certain elements that are not necessary for a family room. When converting your garage to a bedroom you will need to have a window that serves as a secondary escape route, and a closet. There are additional requirements by code, but these are the main ones to consider.
Leaky doors and windows let in uncomfortable drafts and increase heating and cooling costs. Check your garage service door to be sure it has good weather stripping and a threshold that seals tightly to the bottom of the door. In most cases, if your service door is missing a threshold and weather stripping, it’s more efficient to replace the door with a new, weather-tight version. You can buy an inexpensive prehung metal exterior door at home centers and lumberyards.