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Prep Work · 5 min read

Prep Like a Pro: 5 Steps Before You Open a Can

Ask any veteran painter what separates a five-year paint job from a fifteen-year one and you'll get the same answer: what happened before the lid came off. Here's the prep sequence we run on every project — and that you should run on yours.

Step 1 — Wash the Surface

Paint won't bond to dust, chalk, salt film or mildew. Exteriors get a full pressure wash (with a mildew treatment on shaded walls) and at least 24–48 hours to dry. Interiors get a wipe-down — kitchens and bathrooms especially, where grease and residue quietly ruin adhesion.

Step 2 — Repair and Patch

Fill nail holes, skim dents, and patch stucco cracks with the right filler — spackle inside, elastomeric or masonry patch outside. Sand patches flush once dry. A patch you can feel with your palm will be visible from across the room once paint hits it.

Step 3 — Caulk Every Gap

Caulk where trim meets wall, where siding meets windows, and anywhere two materials touch. In Florida this isn't cosmetic: every unsealed gap is a moisture entry point that will bubble your paint from behind. Use a paintable siliconized acrylic and tool it smooth.

Commercial warehouse interior with taped and mudded drywall ready for priming
Prep at commercial scale: every joint taped, mudded and sanded on this Sergeant Painters warehouse project before a drop of finish paint.

Step 4 — Prime the Right Spots

You rarely need to prime everything, but you always need to prime something: bare drywall and patches, stains (with a stain-blocking primer), bare or chalky stucco, glossy surfaces after scuff-sanding, and any dramatic color change. Skipping spot-prime is the #1 reason patches "flash" through the finish coat.

Step 5 — Mask and Protect

Good masking is speed, not fuss: crisp tape lines at ceilings and trim, floors covered wall to wall, outlets and hinges taped or removed. The ten minutes spent taping a bathroom saves an hour of scraping specks off tile.

Reality check: on a typical repaint, our crews spend 40–60% of total job hours on steps 1–5. If a bid seems too cheap, prep is almost always what got cut.

Quick Answers

Do I need to wash walls before painting inside?

Yes - at minimum a dust wipe-down, and a degreasing wash in kitchens and baths. Paint over residue is the most common cause of peeling on interior walls.

Do I have to prime before painting?

Not everywhere, but always on patches, stains, bare surfaces and glossy finishes. Unprimed patches show through the topcoat as dull spots called flashing.

How much of a paint job is prep work?

On a professional repaint, 40-60% of labor hours typically go to washing, repairs, caulking, priming and masking before any finish paint is applied.

What caulk should I use around trim and windows?

A paintable siliconized acrylic caulk. Pure silicone repels paint, and cheap acrylic shrinks and cracks within a year or two in Florida heat.

Rather have a pro handle it? Estimates are always free, and there's no pressure — request a quote or ballpark it yourself in the Pricing Center.

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