How to prepare a room for painting (2024)

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    • How to prepare a room for painting
    • How to fill a large crack or hole
    • How to prepare trims & doors for painting

How to prepare a room for painting

The key to achieving a flawless paint finish is preparation. A fresh coat of paint can often accentuate imperfections on plaster walls so it's important that small cracks, dents and chips are properly filled and sanded to create a smooth, even surface for a picture perfect finish.

Before starting on your walls, it's a good idea to clear the room of all furniture and accessories. If you can't store furniture elsewhere in the house, use good quality drop sheets to avoid getting paint and dust on them as well as your floor surfaces.

You'll need:

  • Poly Sugar Soap
  • Polyfilla Interior Small Cracks
  • Polyfilla Multipurpose Gap Filler
  • A caulking gun
  • A flexible filling blade
  • Fine sandpaper
  • A soft brush
  • Painters tape

Filling small cracks in walls

  1. Ensure your walls have no remaining nails, pins, etc. With fine sandpaper, remove lumps, bumps and any paint flakes. Brush off excess dust and then wash down the walls with Poly Sugar Soap to remove grease and grime. Let the sugar soap dry completely before filling.
  2. Apply a small amount of Polyfilla Interior Small Cracks to your filling blade and draw it across each imperfection on the wall. For larger areas, a trowel should be used.
  3. Remove excess and skim the filled areas lightly in both directions a few times to ensure a no air bubbles are present in the filled space. Feathering the edges will also minimise sanding. Finish by drawing down with firm pressure.
  4. Wait until the application has dried (2 hours for thin 2mm applications depending on humidity), then lightly sand the filled areas to an even finish.
  5. Remove dust with a soft brush. Allow longer drying times for deeper applications or if painting with oil based paints (24 hours minimum). There is no need to use water or sugar soap to clean dry filled surfaces prior to painting.
  6. If filling depths are greater than 2mm, a second application of Polyfilla Interior Small Cracks may be required.

Filling gaps between skirting and architraves
Gaps between the skirting, architraves and wall joints also need to be filled prior to painting, using Polyfilla Multipurpose Gap Filler.

  1. Ensure that the surface to be filled is clean and free from dust. To ensure a neat finish, tape both sides of the gap before applying the gap filler.
  2. Cut the tip off the cartridge and then cut the nozzle at a 45 degree angle to give the desired bead thickness. Place the cartridge in the caulking gun and fit the nozzle.
  3. Hold the gun at a 45 degree angle and dispense the filler ensuring that it is pushed right into the joint.
  4. Use a caulking gun to apply an even line of Poly Multipurpose Gap Filler along the joint or gap. Ensure the filler is touching both sides of the gap.
  5. Run a wet finger or knife along the filled line, pushing it into the gap. Use a damp cloth to remove any excess.
  6. Allow the line to dry at least 30 minutes before taping and/or painting. If painting with oil based paint or if the joint is large, allow at least 48 hours.

Taping
Invest in a good painter's tape and carefully tape off any skirting, architraves, woodwork, etc. As you apply it, gently rub across the edge of the tape that will be painted to help prevent any paint from seeping underneath.

Now you've created a smooth, blemish free surface, youíre ready to paint and achieve a perfect finish! For best results, apply paint undercoat before applying your top coat.

  • How to prepare a room for painting (1)

    Fillers

    Filler - Small Cracks

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  • How to prepare a room for painting (2)

    Cleaners and Strippers

    Sugar Soap Concentrate

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  • How to prepare a room for painting (3)

    Fillers

    Filler - Multipurpose

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  • How to prepare a room for painting (4)

    Fillers

    Filler - Trim and Doors

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  • How to prepare a room for painting (5)

    Fillers

    Filler - Quick Dry

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How to prepare a room for painting (2024)

FAQs

How would you prepare a room for painting? ›

How to prepare a room for painting
  1. Make space. Remove as much of your furniture as you can. ...
  2. Inspect your walls for any damage. Start by inspecting your walls carefully. ...
  3. If there is damage, repair it. ...
  4. Sand. ...
  5. Clean your walls. ...
  6. Let the walls dry. ...
  7. Clean up any mess. ...
  8. You're ready to paint!

How to prep before painting? ›

  1. Prep. Remove all loose paint and patched any holes or cracks in your walls.
  2. Washing Walls. Cleaning walls and trim will remove grime, cobwebs, dust and stains that can prevent your paint from adhering. ...
  3. Taping. Use longer pieces of tape rather than several shorter pieces. ...
  4. Drop Cloths. ...
  5. Priming. ...
  6. Caulking.

What is the correct order to paint a room? ›

You can start anywhere when you paint a room. However, using an orderly process can save time and effort. Painting a room in the correct order will also reduce drips and runs. A good rule of thumb is to always start with the ceiling, next the walls and end by painting baseboards, windows and door trim.

What comes first when painting a room? ›

From Ceiling to Wall Painting - Decorating in the Right Order
  • Step one: start with ceiling paint.
  • Step two: wall painting.
  • Step three: windows, doors and skirting board paint. The last steps in your guide to decorating include the windows, door frames and skirting boards.

How do you prepare and decorate a room? ›

Remove any furniture, use drop cloths or plastic sheeting to protect any floors or woodwork and apply masking tape to skirting boards and cornices to ensure a clean edge. It's also a good idea to add masking tape to light switches and plug sockets too so no paint ends up where it shouldn't be.

Can I paint over old paint? ›

If the current wall is smooth, clean and covered with the same type of paint (both are oil-based for example), you can head straight for the paint. You need to fill holes, spackle and sand*, maybe even cut a new piece of drywall in to the existing wall.

What is the first step before painting? ›

Step 1: Prep the space

Firstly, move all furniture and appliances out or to the middle of the room. This is to prevent any obstructions when you're painting. Cover all items with plastic so that they won't be ruined by drops of paint. You should also protect your floor with a drop cloth for durability and stability.

How many layers should you paint a room? ›

You will want between two and three coats of paint depending on the situation. After the first two coats are applied and dry, take a look to see if the old paint is showing through. You may just need to touch up a few areas, or if lots of paint is showing through, you'll need an entire third coat.

What should not be done before painting interior walls? ›

Wipe down the walls and use painter's tape to cover edges or surfaces — moldings, doorways, window sills — that you won't be painting. Don't: Remove all the lighting. After all, you'll need proper lighting to see what you are doing. Also don't tape over windows as you'll need to ventilate the space.

Do painters clean walls before painting interior? ›

Yes, professional painters clean walls before painting. Cleaning and preparing the wall surface will ensure that your paint job lasts longer and looks better. This involves removing dust, dirt, and old paint chips, applying caulk or putty to cracks in the wall surfaces as well as priming them for optimal results.

Can I use Dawn to wash walls before painting? ›

An effective technique used by many professional painters to wash walls is to use a slightly wet sponge with warm water and a residual cleaning agent, such as dish soap. This method is highly effective for general wall cleaning.

Do professional painters wash walls before painting? ›

Overall, most rooms don't need a full wall scrub unless they are super dirty or grimy. That's one of the reasons why most professional painters do not do a full wash down of walls before painting.

Is it necessary to wash walls before painting? ›

As noted above, most paint manufacturers recommend that you clean walls with at least mild detergent and water before painting. Although modern paints are so good that they bond well to almost any surface, it will adhere best to surfaces that are perfectly clean and smooth.

What happens if you don't sand before painting? ›

Sanding is often a crucial step for ensuring that your surface is ready to be painted. If you don't have a properly sanded surface, paint may not adhere to certain items properly. You can oversand, undersand and often people underestimate its importance. But, you don't have to be a pro to sand a surface.

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