Fresh paint over damaged siding hides the problem and keeps the water coming in. These are the checks worth doing first.
Painting is the last step of an exterior job, not the first. If the siding underneath is cracked, soft or pulling away, a new coating only conceals it — and water carries on getting in behind the wall.
Press-test for soft wood
Take a screwdriver and press firmly against wood siding and trim, particularly low on the wall, around window and door frames, and at the corners. Sound timber resists. If the tip sinks in or the wood feels spongy, that is rot, and rot spreads through the board.
Pay closest attention anywhere water runs or collects — under window sills, behind gutters and downpipes, and along the bottom course of siding near the ground.
Look for movement and gaps
Stand at the corner of the house and sight down the wall. Boards should sit flat and in line. Anything bowed, buckled or lifting at the edge has lost its fixing or has moisture behind it.
Then check the joints: gaps where boards meet, where siding meets trim, and around every penetration for vents, outlets and hose taps. Those are the openings water uses.
Signs the damage is already inside
Peeling or bubbling paint in a specific patch usually means moisture is escaping from behind, not weather hitting the front. Interior clues count too — a stain on an inside wall, or paint lifting on the inside of an exterior wall, points to water passing through.
Persistent mildew that returns quickly after cleaning in the same spot often means that area stays damp because something is letting water in.
Repair first, then paint
Damaged boards get replaced with matching material, soffit and fascia repaired, loose panels re-secured, and every joint sealed watertight. Then the new material is primed — bare wood and fibre cement both need it — and painted to match the rest of the house.
Done in that order, the wall is sealed and the finish blends in. Done in the other order, you pay for the paint twice.