Generally, it will take a minimum of two gallons of paint to cover a room. At the highest end, paint will cost anywhere between $30 and $60 per gallon and come in three different finishes: flat, semi-gloss or high-gloss. Flat finishes are the least shiny and are best suited for areas requiring frequent cleaning. Semi-gloss finishes are a bit shiny but can also be easily cleaned. A high-gloss finish is stain-resistant and easy to clean. Traditionally, living rooms should be painted with a flat finish to allow the paint to stand out. Glossy finishes should be reserved for hallways, and a semi-gloss is best suited for trim. Invest in pre-primed paint whenever possible. This cuts down on time by combining the layering process. Almost any paint job will require a primer, which will cost anywhere from $7 to $15 per can. Primer helps the paint to stand out against the underlayer of paint it's covering, especially if the new paint is lighter than the old coat. You will need at least two cans of primer, if not more, to cover one wall. Here are some paint brands and their average price per gallon:
We’d love to discuss your interior painting needs and provide a cost estimate and plan to meet your dreams. At Home Painters Toronto our goal is your 100% satisfaction. We deliver a professional end result you can be proud of, so we can be proud of it too. Our professional painting crew will make your interior painting project seamless and easy for you. Let us do our job, so you don’t have to.

I was a painting contractor for many years and never asked for a deposit upfront. A good contractor should have great credit with his suppliers and an even better contract if the deal should go south before the job is done. Get to know your customer and explain how each paint covers so they understand fully before you have to apply 3 or 4 coats. If you didn't bid your job right and the client has already signed the contract then that is on you not the client. Yes I haven had to eat the difference but the client was happy and a return customer for years so I made up for it.
Not only careful communication is essential, but we would greatly recommend, when you pick out your type and brand of paint that you go and pay for it, with the contractor's discount, which is given by Sherwin-Williams and most paint companies. Then you will know how much paint you purchased and the coverage. If it is possible, inspect the work of the painter daily. 

To maintain a wet edge, start near a corner and run the roller up and down the full height of the wall, moving over slightly with each stroke. Move backward where necessary to even out thick spots or runs. Don’t let the roller become nearly dry; reload it often so that it’s always at least half loaded. Keep the open side of the roller frame facing the area that’s already painted. That puts less pressure on the open side of the roller, so you’re less likely to leave paint ridges when doing DIY wall painting.

Lap marks are those ugly stripes caused by uneven layers of paint buildup. They occur when you roll over paint that’s already partly dry. (In warm, dry conditions, latex paint can begin to stiffen in less than a minute!) The key to avoiding lap marks  when doing DIY wall painting is to maintain a “wet edge,” so each stroke of your roller overlaps the previous stroke before the paint can begin to dry.
The Lead Renovation, Repair and Painting (RRP) Rule establishes requirements for firms and individuals performing renovations, and affects contractors, property managers, and others who disturb painted surfaces.  It applies to work in houses, apartments, and child-occupied facilities (such as schools and day-care centers) built before 1978.  It includes pre-renovation education requirements as well as training, firm certification, and work practice requirements. 
basic formula? single color exterior labor only ranges from $0.85 to $0.95 per sq foot as a BASE starting point. Prices go up depending on multiple colors, slope of surrounding areas, multiple stories..etc.Some painters charge per window to mask off. Ive seen $25 a window to $50.  Interiors without flooring can be factored the same way. When you start having to do multiple colors, cut ins, masking, room isolation...etc. the price jumps considerably. I always start with a base of $0.85 a sq foot and figure it out from there. the season plays a major role too. paint and materials are charged separatly and are typically marked up at a minimum of 15%. I always tell clients this. that way they pick the paint out they want and what quality they want as well. Anyways...thats your base. 1250 sq foot home @ .0.95 a ft = $1,187.50 (one color). Pressure washing, Add another $45-$55 per hour. a 1250 sq ft home is not going to take longer than 2-3 hours if its a single story. 
Wilson Hampton Painting Contractors is Southern California’s most trusted name in wood finishing. From fine furniture refinishing and restoration to custom case work and Specialty finishes, we pride ourselves in returning wood furnishings back to their natural beauty. We can also age the look or create an exotic look of distress, crackling or glazing. Learn more about Wilson & Hampton Painting Contractors.
Thanks, all, for your time & efforts adding to the article & comments, especially Dave urging requesting both General Liability AND Worker Compensation insurance certificates to protect from real & fraudulent liability--from my experience especially in California, where insurance fraud is a popular income thief, even causing car collisions to collect.
When requested by the party contracting for renovation services, must use an EPA-recognized test kit or must collect paint chip samples, submit them to an EPA-recognized laboratory, and obtain test results from the laboratory to determine whether components affected by the renovation contain lead-based paint.  Note: you must assume lead-based paint is present for housing and buildings covered by this rule, unless testing is done that determines the components affected are lead-free.
DON"T EVER PAINT THE WALLS TO FRESHEN UP YOUR HOME & NEGLECT THE TRIM, MOULDING & DOORS DO NOT HIRE PEOPLE BASED ON THEIR WORD ALONE, IN THESE TIMES IT IS NOT ENOUGH. DON'T AGREE TO PAY HOURLY NOR HALF UPFRONT...FOR PAINT ETC..LOL OR THEY MAY NEVER SHOW UP AGAIN. IF A COMPANY ASK HOW MANY EMPLOYESS WILL BE PAINTING THE HOUSE SO YOU CAN GET A MORE ACCURATE TIME FRAME TO COMPLETE JOB. NOW I NEED TO HIRE SOMEONE TO CLEAN UP A FRIEND OF A FRIEND'S MESS WORK WAS SUBPAR. ALWAYS ASK TO SEE LICENSE AS ALOT OF THOSE I INTERVIEWED CLAIMED ON THE PHONE TO HAVE JUST SO THEY COULD CHARGE MORE, & GAIN ACCESS . THEN THE SALEMAN SIDE COMES OUT. WHEN QUESTIONED FOR PROOF THEY THEN WANT TO NEGIOTATE PRICE. ASK IF RECALKING THE WINDOWS IS INCLUDED IN PRICE...

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Residential house painters on the Handy platform have used countless gallons of paint and tons of brushes over the years. With a wealth of experience under their belts, they know the best, quickest and most cost-effective ways to get the work done. From how to achieve that perfect glossy finish to ensuring no paint drips onto your crown molding, you might find yourself picking up a few tips!
This is an area that interior painters can easily cut short to save time. Most contracts don't state the extent of the wall repairs included, so it's up to the painter's discretion how much they will do. If it seems like too much work, they'll usually point out the repairs but don't include it in the bid. They'll then ask you if you'd like it fixed after they start your project and let you know how much more it will cost.
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