Whether you decide to do the preparation work yourself or have a professional do it as part of your project, proper preparation makes all the difference in creating a smooth and lasting finish. Sure, it adds to your the total time and money spent on your project, but it's certainly worth doing the job right the first time. Otherwise, you'll spend additional time and money down the line on maintenance and repairs. To ensure proper preparation, follow this process before painting your home's exterior (keeping in mind that the process may vary based on exterior materials):
My wife and I just painted the interior of our house with about 6-8 gallons, of $30+ per gallon (meaning the good stuff, non-diluted) with absolutely fantastic results. However we just paid an average of $5 per gallon. Reason...all big box stores have paint, set aside, that has been mixed but not picked up by the customer. They need to sell it quick and if you're not in a hurry (you know well in advance that a room or two need painting and it's not like the roof leaking and needs an immediate fix) you can go to each store when you need other supplies or food, like Walmart (when convenient, driving 20 miles to each is not worth it) and over the course of a month or two, pick out some very nice colors of quality paint. We found perfect colors...not saying they were our first choice but when we opened the can, very nice and some even better than our original picks. Cost to paint the entire house was about $100, with all materials included, period. We had it on the market for a few months to sell, didn't sell, painted the rooms, got 2 offers the day after we finished, took the best one and never looked back.
Whether you are painting the exterior of your home to boost its curb appeal, change a color you don't like or refresh a dilapidated paint job, one thing is certain: Painting your home's exterior is a large job that requires proper planning, preparation and tools. In most cases, painting your home's exterior is a job best left to a pro. But before you call one in, you'll want to consider a few factors that will affect your project's cost.
Some contractors work on time and material others on a firm contract. I would never hire the former and am leary of the latter. A contractor may low-ball a bid to get the job planning to make a killing on change orders. If you say good morning to them, they charge you extra for that. If the contract is not very, very specific and extensively fleshed out or if they display their change order schedule prominently on top, show them the door.