Exterior House Repainting
The Process, Step by Step

When an exterior repaint is due

Outside walls in Malaysia take strong sun, daily heat and cooling, and monsoon rain that arrives almost sideways. Weatherproof exterior paint is made for that, and the paint types guide puts its life outdoors at 5–10 years, against 1–3 years for interior emulsion used outside. The signs that the film has reached the end of its life are easy to check:

• Chalking. Rub the wall with your palm. If a coloured powder comes off, the binder has broken down and the paint no longer sheds water well. On larger buildings, a coating that is 8–10+ years old and chalks on your hand is one of the signals that a facade programme is due.
• Fading and patchy colour, worst on the walls that face the afternoon sun.
• Hairline cracks across the render, especially around windows and at the top of walls.
• Black or green streaks of algae and mould under ledges and on shaded walls.
• Bubbling or peeling, which often means water is behind the paint, not that the paint is old.

That last sign changes the job. If paint is bubbling on a rain-facing wall, read why paint bubbles and peels first: repainting over a wet wall fails again within months.

The exterior repaint process at a glance

A proper exterior repaint is mostly preparation. The painting itself is the short part at the end. This is the sequence a good quotation should follow, stage by stage:

Washing: the step that decides whether the paint sticks

Old exterior paint turns to powder on the surface. New paint laid over that powder is sticking to dust, and it lifts in sheets later. Washing removes the loose chalk, dirt and algae so the sealer can bind to a sound surface.

Mould and algae need treating, not only washing, or they grow back through the new coat within a wet season. After washing, the wall must be allowed to dry before anything is applied. Paint applied to a damp, sun-baked wall is a classic cause of small blisters: moisture in the wall turns to vapour in the heat and pushes the film up.

Crack filling: hairline versus structural

Most exterior cracks are hairline cracks in the render. They are cosmetic, but they matter on an outside wall because driving rain enters through them. The wall waterproofing guide describes the standard sequence: rake out and seal visible cracks with a flexible sealant, make good spalled render, then apply two full coats of elastomeric coating over a primed, cleaned surface.

A crack that is wider than 3 mm, or still growing, is a different matter. It needs an engineer to look at it before anyone fills it; see structural crack repair. Filling and painting over a moving crack only hides it until it opens again. For the sealant itself, PU vs silicone sealant for exterior joints explains why silicone is a poor choice where the joint will be painted.

Scaffold, ladders and rope access

Access is often the difference between two quotations that look alike. A single-storey terrace can usually be done from ladders and a small platform. Upper floors need scaffold or rope access, and the house painting cost guide on this site adds RM800–RM2,500 for it on upper-floor exteriors.

Ask whether access is in the price, how long the scaffold stays up, and who is responsible for the neighbour’s side if the scaffold stands on their land or car porch. On high walls and condo facades, access can cost as much as the coating, which is why external works in strata buildings are usually handled by the management; see facade waterproofing.

Sealer and primer: the coat people try to skip

New or patched plaster is highly alkaline, and alkali attacks paint. Exterior jobs typically need full alkali primer before the topcoat on new plaster. On an old repaint, a sealer also binds any chalky surface that washing did not remove, so the topcoat has something firm to hold.

Allow the primer to dry fully, 2–4 hours, before topcoating, longer in humid weather. A quotation that does not name the sealer is the one to question, because it is the coat most often cut to undercut a price.

Two topcoats, and why weather controls the schedule

Most walls need one primer or sealer coat plus two topcoats for an even, durable finish. Weatherproof exterior paint has UV resistance, an elastomeric (crack-bridging) formulation and a water-beading surface, which interior paint lacks. Brands you will see on quotations include Nippon Weatherbond, Dulux Weathershield, Jotashield and Kansai Weathermax; the paint types guide compares them.

Paint in the cooler morning or evening, not in direct midday sun, which dries the paint too fast for it to bond. Rain stops work, so an exterior facade can take a few days to two weeks depending on weather and scaffolding. An unusually fast schedule during the rainy season is a warning sign.

Normal exterior paint or an elastomeric coating?

For a sound wall with only hairline cracking, two coats of a good weatherproof exterior paint is the usual choice. Where a rain-facing wall, gable end or parapet is letting water in, an elastomeric coating does more: it stretches over hairline cracks and acts as part of the waterproofing.

The cost difference is visible in the site’s guides. Elastomeric or weathershield coating is quoted at RM4–RM8 per sq ft in the paint bubbling guide, and a terrace-house gable end of 300–500 sq ft with crack repair and two elastomeric coats commonly lands around RM2,000–RM6,000, depending on condition and access. If damp is already showing indoors, start with external wall seepage before choosing the paint.

What an exterior repaint costs

Indicative Klang Valley ranges for 2026, quoted unchanged from the house painting cost guide on this site. They cover labour and paint for a straightforward repaint; heavy crack repair, damp treatment and access for upper floors are extra:

For an interior-and-exterior job, the guide to choosing a painting contractor lists what a quotation must itemise, and the paint calculator estimates litres for your wall area.

What the quotation should list

• Walls included: front, sides, back, boundary walls, parapets and the car porch soffit, each named.
• Access: ladder, scaffold or rope access, and whether it is in the price.
• Preparation: washing, mould and algae treatment, crack repair method and sealant type.
• Sealer or primer: the product and where it goes.
• Topcoat: brand, product series and number of coats. A brand name alone is not a specification.
• Exclusions: grilles, gates, roof, gutters and timber, which are often priced separately.
• Schedule: working days and what happens on rain days.

How ClickBina quotes exterior repainting

ClickBina is an experienced KL & Selangor contractor. We handle whole-house refurbishment and coordinate the trades, and we supply and install interior finishes chosen by budget and use case.

WhatsApp us your job details for a quote. A site visit is RM150, waived if you go ahead. The price is flat, with no hidden charges, and we reply within the hour. ClickBina is SSM-registered.

Sources & methodology

This guide brings together figures and practice already published in the site’s painting and waterproofing guides: the paint types guide (exterior paint life, primer drying time, coats, painting in midday sun), the wall waterproofing guide (crack and elastomeric sequence, gable-end cost), the paint bubbling guide (elastomeric rate), the facade waterproofing guide (coating age), the structural crack guide (3 mm threshold), the painting contractor guide (schedule) and the house painting cost guide (exterior cost table and access). Prices are typical Klang Valley market ranges for 2026, not fixed rates; the final price depends on the condition of the walls and access, confirmed on site.