Prep work should include removing all loose paint, either with a pressure washer or by scraping; removing any trace of mildew using bleach and water or a commercial solution, and sealing or covering dark stains; caulking all seams, corners and around windows or trim; applying epoxy filler to repair serious woodwork problems; covering dark stains; sanding all rough surfaces, and priming the bare wood with a bonding primer.
It's up to you. Outside is much harder because it requires more prep, patience, time, help, money and of course, effort. I have been painting my own houses and rental properties interiors for 20 years, and I painted the exterior of one, once. I then had it promptly done again by professionals who said it would have been cheaper if they didn't have to undo my work first. My advice is to get pros for the outside because everyone will see it.
A more user-friendly option is a water-based “latex” paint, which blends acrylic pigments with a thin base for easy application with a brush or paint sprayer. Although many water-based interior paints are promoted as one-coat wonders, there can still be a need for an initial primer coat followed by one or two coats of latex paint. Water-based paints are very low in VOCs, which means minimal odors during the drying period. Most spills can be wiped away without the need for chemical cleaners, and clothing containing latex paint can be laundered in water and detergent. Water-based paint is a good choice for first-time DIYers and their younger assistants.
Plan the workforce. If you intend to not hire a professional crew, you'll need lots of help. There are many jobs to be done. First there's the furniture moving, then wall preparation, floor covering, materials gathering and prep, cleaning, and don't forget everyone will have to eat. It can easily take a team of five people a full ten days to paint a two-story (approx 2000 sq.ft.) home. Get as many people to help as you can. If some can only come one or two days, great. Maybe others can fill in. Ensure you plan with your workforce members in mind. They'll need plenty of time to arrange days away from work. Identify a few key personnel:
The next step up is a semigloss finish, which has the level of reflectivity that makes an impression but can be challenging to apply. Semigloss paint provides great coverage and is easy to clean but is less forgiving when it comes to brushstrokes and overspray. The highest-end finish is full gloss, which looks very luxurious when the job is finished, but requires a surprising amount of prep work and painting experience to apply correctly. It is also on the expensive side, so it is often used sparingly on door frames, window treatments and accent walls.
Paint acts as a protectant on wooden siding, slowing down the rotting process. This makes it incredibly important to fully coat the undersides of corner boards on the exterior of your home. Whether you’re undertaking a DIY house painting endeavor or have hired professionals, you should check corner boards and shutters to make sure they’re fully painted.
Basic labor to paint home with favorable site conditions. Prep up to 3 hr per 100 SF - clean, scrape, sand and patch up to 4 defects per 100 SF. Caulk gaps and spot prime. Roll / brush 2 coats of paint over lightly textured ceiling/walls. Paint up to 2 doors and door trim per room. Includes planning, equipment and material acquisition, area preparation and protection, setup and cleanup. 129 square feet $97.99 $132.56
You’ll spend between $500 and $3,000 or $1 to $3.50 per square foot to paint concrete. However, expect to pay $2 to $7 per square foot since concrete almost always needs a coat of primer first. Double that price if the concrete requires stripping. Concrete is porous. Sealing it not only helps blend foundations and walls with your home’s aesthetic, but also seals it against water. Repairing or resurfacing concrete costs $300 to $500 for every 100 square feet.