Synthetic resin paint or mineral paint on render – which should you choose in Skåne?

The binder is one part of the specification. Render type, existing paint, water-vapour permeability, water absorption and exposure all affect the choice. Product data must support suitability for the actual wall; the same applies to a rendered façade in Höganäs in a weather-exposed position.

Acrylic, silicate and silicone-resin façade paints are broad product categories. Their performance varies by formulation and complete system, so compare the manufacturer’s declared properties and permitted substrates.

Silicate systems can rely on bonding with suitable mineral substrates, but their permitted existing coatings and preparation differ by product. Silicone-resin paints form a separate category; do not treat every silicone-resin or acrylic product as having identical permeability or rain resistance.

The table below compares the three paint types on the factors that determine the choice.

For the complete process from priming to finishing, read more about rendered façade painting in the area.

The coating must suit the moisture behaviour of the actual wall construction, including rain exposure, drying routes and any underlying damp defects. A coating choice alone cannot diagnose or repair a moisture problem.

Moisture can enter a rendered wall through defects, rain exposure or other routes. Assess the source and condition before choosing a repair or coating; visible damp cannot be diagnosed from the paint category alone.

The sd value describes water-vapour diffusion resistance as an equivalent thickness of air. Compare the documented system values and water-absorption properties for the actual wall; neither acrylic nor mineral is a sufficient specification on its own.

The wall must be able to manage rain and dry as intended. Check cracks, junctions and persistent damp before repainting. Where an underlying water defect exists, have its cause addressed rather than relying on paint to conceal it.

A compatible system and sound moisture management reduce avoidable coating problems, but no binder category alone guarantees protection from damp or frost damage. Diagnose the wall and specify repairs before painting.

Water in susceptible masonry or render can contribute to freeze–thaw damage. The likelihood depends on the material, saturation, exposure and defects; this guide does not establish the most common cause for every façade in Skåne.

A vapour-permeable coating can be part of a suitable wall specification, but it does not remove all moisture risks. Check water entry, render condition and the complete system before selecting a finish.

Match the repair and coating to the actual wall construction. Recurring cracks, detached render or persistent damp need assessment before painting. Agree the repair scope as part of the façade renovation.

No single paint category has a guaranteed maintenance interval on every rendered façade, because the specified product, preparation, existing surface and exposure determine performance. Use the product’s maintenance guidance and inspect the actual building.

Different coatings can chalk, lose adhesion or deteriorate in other ways. Identify the cause and whether the existing layer is sound before deciding on cleaning, repairs or removal.

Local exposure is one input to the specification. For a façade around Helsingborg and Höganäs, assess the actual orientation, rain exposure, render and existing coating instead of promising a lifespan from location alone.

The comparison below lists assessment points, not verified maintenance intervals for entire paint categories.

For an idea of the total cost for your façade, see the cost overview under example façade renovation price.

Ask NLL Måleri to specify the system for the actual rendered façade: the quote should identify the preparation, primer, finish and any required repairs. This guide does not establish an exclusive brand policy or one system suitable for every building.

Specify the render, existing coating, exposure and required system properties first. Then check the selected manufacturer’s instructions for permitted substrates, preparation, priming and finishing.

Before accepting the specification, confirm how the assessment covers these four points:

• tapping to find detached and loose areas,
• mapping cracks and previous repairs,
• checking signs of damp and any tests needed, and
• identifying what is already on the wall.

The existing coating can affect preparation and the new system. Agree the scope in a written quote and compare what rendered façades cost per square metre, subject to the agreed scope. Any ROT deduction depends on eligibility and remaining allowance. Ask for the schedule and any warranty terms in writing before work starts.