Paint & project guides

Prep and how-to articles — primer, wall repair, painting steps — plus coverage calculators for paint, wallpaper, and stain on paint-calculator.ca.

Prep & how-to

Should I Use Primer Before Painting?

When primer is required vs optional, which type to buy, how much you need, and what happens if you skip it on walls and ceilings.

10 min read

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Prep & how-to

How to Repair Walls Before Painting

Fix holes, cracks, nail pops, and damaged drywall so your paint job looks smooth — step-by-step for DIY prep.

10 min read

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Prep & how-to

How to Patch Drywall Holes Before Painting

Fix small dents to medium holes (up to 6 inches) with spackle, patch kits, or California patch — ready for primer and paint.

9 min read

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Prep & how-to

How to Prep Walls for Painting — Complete Checklist

Clean, sand, caulk, tape, and protect floors. The prep checklist pros use before opening the first gallon.

10 min read

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Prep & how-to

How to Paint a Room — Step-by-Step for Beginners

Cut in, roll walls, paint ceiling and trim in the right order. Drying times, tools, and tips for a clean DIY job.

11 min read

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Prep & how-to

Painting Over Dark Colors — Primer Tips That Save Coats

Cover navy, red, or black walls with lighter paint without using five finish coats. Tinted primer and technique.

8 min read

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Prep & how-to

How to Fix Peeling Paint Before Repainting

Scrape, sand, prime, and repaint areas where latex or oil paint is flaking — stop peel from spreading.

9 min read

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Prep & how-to

How to Remove Wallpaper Before Painting

Strip old wallpaper, clean adhesive, and prep walls for paint or new paper — avoid bubbling and peel later.

9 min read

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Prep & how-to

Flat vs Eggshell vs Satin — Which Paint Sheen to Use?

Choose the right interior finish for walls, trim, ceiling, kitchen, and bathroom — washability vs hide.

8 min read

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Prep & how-to

How to Tell If Paint Is Oil or Latex — Quick Wall Tests

Alcohol wipe test and other DIY methods to identify oil-based vs water-based paint before you prime or repaint. Avoid peeling by matching the right primer.

9 min read

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Prep & how-to

How to Choose Primer for Interior Walls — Decision Guide

Pick the right interior primer: PVA for new drywall, stain-blocking for marks, bonding for oil and gloss, tinted for dark-to-light. Decision table for DIY painters.

10 min read

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Prep & how-to

Painting Over Oil-Based Paint with Latex — Prep That Sticks

How to repaint oil enamel walls and trim with latex: sanding, bonding primer, clean-up, and common peeling mistakes. Pair with the oil vs latex wall test.

9 min read

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Interior paint

How Much Paint Do I Need for a Room?

Step-by-step guide to calculating wall and ceiling paint for any rectangular room. Formulas, coat counts, and when to buy extra.

9 min read

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Interior paint

How Many Coats of Paint Do You Need?

One coat vs two coats vs three — when primer counts as a coat, and how to plan for color changes and new drywall.

8 min read

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Interior paint

Behr Paint Coverage per Gallon Chart

Behr paint coverage chart by product: interior ~350–400 sq ft/gal; primer & exterior lower. Use your can label, then enter room size in our free gallon tools.

8 min read

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Interior paint

Interior Painting Project Guide — Room Redo Start to Finish

Complete DIY roadmap for painting a room: assess oil vs latex, choose primer, prep walls, gather tools, cut in and roll, and time your coats. Links every step to free calculators.

12 min read

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Interior paint

Interior Painting Tools and Supplies List — What You Actually Need

DIY checklist of rollers, brushes, trays, tape, drop cloths, and prep tools for painting a room — what to buy, what to skip, and how to match nap to wall texture.

9 min read

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Interior paint

How Long Between Paint Coats? Dry Time Guide for DIY

Recoat times for latex and oil paint, how humidity and temperature change dry time, and when a second coat is safe — so you avoid peeling and lap marks.

8 min read

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Interior paint

How to Paint Cabinets and Trim — Prep, Primer & Coats

DIY guide to painting kitchen cabinets, interior doors, and trim: degrease, sand, bond-prime, and estimate gallons with the cabinet & trim calculator.

9 min read

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Wallpaper

How to Estimate Wallpaper Rolls for a Room

Wall width, roll length, pattern repeat, and waste — a plain-language guide before you buy wallpaper.

9 min read

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Wallpaper

Wallpaper Pattern Repeat Explained

What pattern repeat means on a wallpaper label, how it affects roll count, and tips for accent walls.

8 min read

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Wallpaper

Accent Wall Wallpaper — How Much Do You Need?

Calculating wallpaper for one feature wall instead of a full room. Less paper, but pattern repeat still applies.

7 min read

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Stain & deck

How Much Fence Stain Do I Need?

Calculate gallons for board-on-board, shadowbox, or privacy fence stain using length, height, and coverage per gallon.

8 min read

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Stain & deck

Deck Stain Coverage — Boards, Rails & Stairs

How to estimate deck stain gallons including floor boards, railings, steps, and vertical surfaces.

8 min read

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Exterior

Exterior House Stain — Planning Gallons & Coats

Estimate stain for siding, logs, or exterior walls. Coverage, two-coat rules, and when to use our house stain calculator.

8 min read

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