Painting Contracts · Question

Why does fresh paint look patchy and streaky after the job is finished?

Short answer

Patchy or streaky paint usually comes from uneven surface preparation, too few coats, a missing or wrong primer, thinning the paint too much, applying over damp or before layers dried, or glossy finishes showing every flaw in raking light. Look at the wall in different light, note where the marks sit, and raise the findings with the contractor in writing against the agreed specification.

In more detail

Before blaming the paint, look at the pattern, because the pattern points to the cause.

Blotches matching the earlier patches or repairs: the filled spots absorb differently from the rest of the wall, which suggests the primer or putty step was thin or skipped.
Vertical or horizontal streaks across a wall: uneven roller or brush technique, paint that has begun to dry at the edge before the next stroke, or paint thinned too much.
Dark and light bands that move as you walk past: sheen differences caused by uneven film thickness, more visible on silk and satin finishes in side light.
Lap marks where one day's work meets the next: wet edges were not maintained, or different batches were used.
Faded or weak colour that lets the old colour show: too few coats for the colour change.
Patches that bubble, discolour or flake: moisture is coming through, which needs a different remedy.

Light matters. A wall viewed with sun or a lamp along its surface exaggerates tiny irregularities that look fine from the front. Check at different times, and compare with the approved sample if one exists.

Put it in writing with photographs

Photograph the defects in the same light, mark them with tape, and send a dated note to the contractor quoting the contract specification: number of coats, products, preparation and finish standard. Ask for a joint walk-through and a rectification plan.

Rectification typically means another coat, sanding and local repair, or full recoating of a wall for a break in the pattern. Where damp is the cause, the repair belongs in a separate treatment, and the contractor should say so. Keep the final payment or retention until the finish is accepted, as agreed in the contract.

Key points

The pattern of the marks points to the cause, so study it in different light.
Thin preparation, thin coats and rushed drying are the common culprits.
Lap marks and streaks often come from technique and thinning.
Compare with the approved sample and the contract specification.
Report defects in writing with photographs and ask for a rectification plan.

Who this applies to

Owners who have just taken over a painted building and are unhappy with the look.
Property managers inspecting finish quality before releasing payment.
Contractors and clients resolving a finish dispute without delay.

Last reviewed 3 October 2026

This answer is general information, not advice on your particular case. Terms, eligibility, and requirements change, so check the current position with the relevant institution or authority.