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house painting diy

House Painting DIY – Full Prep & Undercoating Guide

  • A good paint job depends mostly on preparation.
  • This guide covers prep steps for walls, hallways, kitchens, ceilings and bedrooms.
  • Includes paint types, brands, surface behaviour, tools and key painting tips.

Essential Prep Steps

Inspect the surfaces

  • Look for cracks, peeling, mould, bubbling or active damp.

Clean the surface

  • Remove dust and loose debris.
  • Use a degreaser for kitchens and high-grease areas.

Repair cracks

  • Small cracks → lightweight filler or acrylic gap compound.
  • Large cracks → plaster repair with mesh tape.

Apply primer or sealer

  • Required for new plaster, glossy surfaces, stained walls and patched areas.

Check moisture levels

  • Indoor humidity: ideally under 60%.
  • Never paint over active moisture or rising damp.

Wall Types and Their Behaviour

Comparison Table of Wall Types

Wall TypeCharacteristicsNeeded PrepSuitable FillersNotes
Plaster / GyprockAbsorbs moisture quicklyAcrylic sealer/primerLightweight fillerCommon in modern homes
Cement / MasonryRough & porousStrong primerAcrylic or oil-based fillerNeeds more product
Old Oil-Based PaintGlossy, slipperySand + multi-purpose primerAcrylic fillerMust dull the surface
Plasterboard / DrywallJoints need sealingFull surface primingJoint compoundTape + fill required

Prep for Each Area

General Walls (living areas and lounge rooms)

  • Wipe surfaces clean.
  • Fill cracks and dents.
  • Sand smooth.
  • Apply primer.
  • Recommended paint: acrylic water-based.
  • Brands: Dulux, Taubmans, Haymes, British Paints.

Hallways (high-traffic areas)

  • Repair dents and scratches.
  • Use stronger filler for impact damage.
  • Apply primer.
  • Recommended paint: washable acrylic or semi-gloss/low-sheen oil-based.
  • Avoid high-gloss (shows imperfections).

Kitchens (grease, heat and steam)

  • Clean thoroughly with a degreaser.
  • Allow full drying.
  • Use a stain-blocking and grease-resistant primer.
  • Fill damaged areas with acrylic or oil-based filler.
  • Recommended paint: semi-gloss, low-sheen oil-based or moisture-resistant kitchen/bathroom paint.

Ceilings

  • Remove dust and cobwebs.
  • Fill small cracks.
  • Use stain-blocking primer for water marks.
  • Recommended paint: flat or low-sheen ceiling white (acrylic).

Bedrooms

  • Repair and sand cracks.
  • Prime especially when covering dark colours.
  • Recommended paint: matt or low-sheen acrylic.
  • Calming tones: cool blues, soft greens, light greys.

Recommended Paint Types (Quick Table)

AreaBest Paint FinishWhy
Living RoomsLow Sheen AcrylicHides imperfections, easy cleaning
HallwaysWashable Acrylic / Low SheenDurable for high traffic
KitchenSemi-Gloss / Oil-BasedHandles grease, easy to wipe
CeilingsFlat AcrylicReduces glare & imperfections
BedroomsMatt / Low SheenSoft, calm appearance

Materials and Tools

  • Primer/sealer
  • Fillers (acrylic, oil-based or lightweight)
  • Rollers with suitable nap
  • Brushes (2–3 inch)
  • Scraper and putty knife
  • Sandpaper (120–240 grit)
  • Paint tray
  • Painter’s tape
  • Drop sheets
  • Mixing paddle

Moisture and Temperature Guidelines

  • Ideal humidity: 30–60%
  • Ideal temperature: 10–30°C
  • High humidity slows drying, increases streaking risk and reduces adhesion.

Before You Start Painting

  • Turn off power and cover switches/outlets.
  • Mask windows, doors, frames and tiles.
  • Cover or remove furniture.
  • Ensure good ventilation.
  • Test paint colour on a small patch.

Important Painting Tips

  • Don’t overload the roller.
  • Use thin, even coats (2–3 recommended).
  • Keep roller strokes consistent.
  • Paint ceilings before walls.
  • Cut in edges with a brush before rolling.
  • Allow full drying between coats.
  • New plaster always requires at least one coat of sealer.
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