Painting Internal Doors – Costs, Preparation & Professional Finishes

Painting internal doors is a relatively affordable way to refresh a home's interior without replacing the doors themselves. Whether you have traditional panelled timber doors, modern flush doors or previously painted MDF, careful preparation and the correct paint system can produce a durable, professional-looking finish.

Current UK cost guidance puts professional internal door painting at approximately £80–£100 per door for both sides, averaging around £90. Painter and decorator rates are currently around £250–£400 per day, with a UK average of approximately £325.

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How Much Does It Cost to Paint Internal Doors?

For professional painting, a useful current benchmark is:

These figures are indicative. Doors requiring stripping, repairs or extensive preparation can cost more.

An older Checkatrade door-specific dataset gives approximately £50–£70 per interior door, showing why the scope and amount of preparation need to be established when comparing quotations.

Painting Internal Doors Step by Step

The quality of the finish depends heavily on preparation.

A typical process is:

Protect → Remove Hardware → Clean → Repair → Sand → Prime if Required → First Coat → Second Coat → Cure → Refit Hardware

Dulux recommends protecting the surrounding area, removing the handle, masking hinges, sanding and cleaning the door before painting. For bare wood, an appropriate primer and undercoat may be required; previously painted doors may not always require a separate primer, depending on their condition and the selected paint system.

Preparing Internal Doors for Painting

Preparation should not be skipped, particularly when painting over old gloss.

Start by inspecting the door for:

• Flaking paint
• Chips
• Dents
• Scratches
• Grease
• Cracks
• Loose coatings
• Damaged edges

Clean the surface and lightly sand it to remove sheen and provide a suitable key for the new coating. Dulux recommends removing sanding dust and wiping the surface before painting.

A door with several layers of damaged old paint may require considerably more preparation.

Do You Need to Remove the Door?

Not necessarily.

Internal doors can usually be painted while hanging. Removing the handle and masking the hinges makes the process easier.

Leaving the door in place can be convenient because both faces can be accessed without finding somewhere to lay the door flat.

However, removing it may be worthwhile where extensive repairs, stripping or work on the top and bottom edges is required.

Do You Need to Sand Internal Doors Before Painting?

Light sanding is generally advisable for previously painted timber.

It helps remove imperfections and reduces the sheen of glossy coatings so the next paint system has a suitable surface.

Dulux recommends fine-grade sandpaper for routine preparation, with a somewhat coarser grade potentially needed where the surface is damaged or extremely glossy.

The objective is not necessarily to remove every layer of existing paint.

Can You Paint Over Gloss?

Often, yes—but preparation matters.

Painting directly onto a smooth, glossy surface without preparation can lead to poor adhesion.

A sensible process is:

Clean → Degrease → Sand → Remove Dust → Prime if Required → Repaint

Whether a separate primer is necessary depends on the existing coating, substrate and new paint. Follow the manufacturer's instructions for the particular product being used.

Best Paint for Internal Doors

Common finishes include satinwood, eggshell and gloss.

Dulux currently offers all three types for interior doors and woodwork, including water-based quick-drying options.

Satinwood

Satinwood provides a noticeable sheen without the highly reflective appearance of traditional gloss.

It is a popular contemporary choice for:

• Doors
• Skirting
• Architraves
• Window frames

Eggshell

Eggshell produces a lower-sheen finish.

It can work particularly well in interiors where a softer, understated appearance is preferred.

Gloss

Gloss creates a much more reflective finish.

It can be particularly suitable for traditional decorating schemes and where doors are intended to contrast strongly with matt walls.

Water-Based vs Oil-Based Door Paint

Water-based trim paints have become a popular option for interior doors.

Depending on the product, advantages can include:

• Faster drying
• Lower odour
• Easier brush cleaning
• Shorter recoating times

For one of its water-based systems, Dulux recommends a synthetic brush and states that a second coat can be applied after six hours. Exact drying and recoating times vary by product, so always use the instructions on the paint being applied.

How Many Coats of Paint Do Internal Doors Need?

Two finishing coats are common, although the exact requirement depends on the product and colour change.

Dulux's interior-door guidance recommends applying a first coat of satinwood, allowing it to dry and then applying a second coat. Its eggshell specification similarly calls for two coats and notes that a substantial colour change can require additional coats.

Bare timber may also require an appropriate primer or undercoat.

Brush or Roller for Internal Doors?

Both can be useful depending on the door design and paint.

Panelled doors typically require careful brushwork around mouldings and recessed details.

Large flat doors can potentially be completed using a combination of brush and suitable roller, although the finish produced by a roller depends on its type and the coating. Dulux specifically recommends a synthetic-bristle brush for its professional interior-door method.

Whichever method is used, avoid overloading the applicator.

Painting Panelled Internal Doors

Panelled doors require a logical painting sequence to minimise visible overlaps.

Generally, work from the detailed recessed sections towards the broader flat areas and outer sections of the door.

Keep a wet edge where possible and finish brush strokes consistently.

Decorative mouldings require particular attention because excess paint can collect in corners and create runs.

Painting Flush Doors

Flat flush doors appear easier to paint, but imperfections can be particularly visible across a large uninterrupted surface.

Careful sanding and smooth application are important.

Work systematically across the surface rather than repeatedly returning to areas where the paint has already started drying.

Painting MDF Internal Doors

MDF doors can be painted, but the appropriate preparation depends on whether they are factory-finished, primed, bare or previously painted.

Bare MDF edges can be particularly absorbent and may require appropriate sealing or priming.

Some modern multi-surface products are designed for direct application to MDF. For example, Dulux currently specifies its Simply Refresh Multi-Surface Eggshell for MDF as well as wood, metal and melamine without a separate primer.

Always check the instructions for the exact door material and coating.

Painting Wooden Doors

Bare wooden doors usually require more preparation than previously painted doors.

Potential steps include:

• Filling defects
• Sanding
• Treating knots where necessary
• Priming bare timber
• Undercoating where specified
• Applying finishing coats

Dulux's eggshell guidance advises treating knots appropriately, priming bare surfaces and repairing defects before applying the finishing system.

Painting Doors White

White remains one of the most versatile choices for internal doors because it works with a wide range of wall colours and flooring.

Popular approaches include:

White Walls + White Doors for a clean, continuous appearance.

Coloured Walls + White Doors for stronger architectural definition.

Off-White Doors + Neutral Walls for a softer traditional scheme.

When repainting yellowed older white doors, adequate preparation and complete coverage are important.

Painting Internal Doors a Dark Colour

Black, charcoal, navy and deep green doors can create a strong interior feature.

Dark doors can work particularly well with:

• Light walls
• Period mouldings
• Brass hardware
• Contemporary interiors
• Statement hallways

However, darker finishes can sometimes reveal surface imperfections, so preparation remains important.

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