Consider painting your metal roof when the finish has clearly faded or worn away, paint is starting to flake, or you can see surface rust. It is best to repaint before corrosion weakens the sheets. See our metal roof painting service for details.
Frequently asked questions – roof coating and solar panels
Coating a 200 m² metal roof costs about €3,150 in a standard case.
Roof coating is often clearly more affordable than replacing the roof.
The roof is worth maintaining before solar panels are installed.
The benefit of solar panels depends on consumption, roof direction and system sizing.
Painting is usually the right option when the sheets and underlying structure are sound and the problems are limited to the finish, surface rust or small local repairs. Replacement is the better option if the sheets are perforated or widely weakened, there are several leaks, or the structures need extensive repair.
The calculator’s base level for metal roof maintenance painting is about €13–23/m² depending on roof size, and the calculator estimate for a standard 200 m² roof is about €3,150. Pitch, rust, loose paint, preparation and repairs affect the final price; use the roof price calculator for an initial estimate.
Cleaning alone is often enough when the finish is intact and the main problem is dirt, pollen, needles or light organic growth. If paint is flaking, the finish is badly faded or rust is visible, cleaning is only preparation for maintenance painting; see the metal roof cleaning prices.
Metal roof maintenance painting usually includes an inspection, cleaning, removal of loose paint, rust treatment, any necessary primer and the agreed finish coats. Sealing, fastener replacement and other repairs are specified according to the roof condition and the quote.
A rusty metal roof can often still be painted if the corrosion is mainly superficial and the sheets remain sound. If rust has perforated the sheets or weakened large areas, the damaged sections must be repaired or replaced before painting.
We remove loose rust and clean the surface so the primer can bond properly. Corrosion protection comes from the complete system of proper preparation, a compatible metal primer and the finish coat; rust removal alone does not prevent new corrosion.
The old finish can be painted over if it is clean, firmly attached and compatible with the new paint. Flaking or poorly bonded paint is removed, and compatibility is assessed before work begins.
Metal roof painting on a typical detached house often takes a few working days. Roof size, preparation, drying times, repairs and weather can extend the schedule, so the timing is confirmed for each property.
The maintenance interval depends on the paint system, preparation, weather exposure and later upkeep, so there is no single figure that applies to every roof. Inspect the roof regularly and maintain it before extensive damage develops; the maintenance interval is different from the workmanship warranty stated in the quote.
Metal roof painting requires a dry surface and temperature, humidity and drying time within the coating manufacturer’s instructions. Painting is not carried out in rain or on a wet surface, and excessive heat, strong wind or rapidly forming evening dew can also prevent the work.
The colour can usually be changed during painting when the new shade and coating system suit the substrate and cover the old finish as planned. The final choice should consider the colour chart, the building’s appearance and any local requirements.
Inspect a painted metal roof annually and keep it clear of leaves, needles and other debris that retains moisture. Check gutters, penetrations, fasteners and any scratches at the same time so small defects can be repaired early.
An initial metal roof painting estimate can often be prepared from clear photos, the address, roof area and basic details. Include views of every slope and close-ups of rust and loose paint in the quote request.
Cleaning is enough when the tiles are sound, the surface is not significantly worn, and the main issue is dirt or organic growth. Tile roof coating is worth considering when an otherwise sound but porous and faded surface needs new protection after cleaning; see roof cleaning and maintenance and tile roof coating.
The indicative price for tile roof coating is about €11.50–19.50/m², and a standard 200 m² roof is about €2,600. A demanding 200 m² roof is often about €3,100–4,400 because pitch, moss, repairs and preparation add work; see the tile roof coating prices.
The price of tile roof cleaning depends on roof area, pitch, the amount of dirt and moss, access and any agreed extra work. There is no single cleaning price that suits every roof, so an accurate estimate is based on photos and property details.
Moss develops where moisture and organic matter collect, especially on shaded slopes that dry slowly. Moss should be removed because it holds moisture, traps dirt and can put extra strain on tile surfaces and joints.
We first remove loose growth and debris, then clean the roof using a method suited to the material and its condition. A growth treatment can be applied to the clean surface where needed and according to the product instructions, but it does not replace broken-tile replacement or other repairs.
Excessive pressure, the wrong working distance or directing water into the structure can damage the tile surface and force water beneath the covering. The method and pressure must suit the condition of the tiles; a fragile or broken roof is not treated like a sound surface.
Tile roof coating includes inspection, removal of loose debris and growth, thorough cleaning, agreed replacement of broken tiles, the necessary preparation and application of the new coating. The surface must be clean, dry and sufficiently sound for the coating to bond as intended.
An old tile roof can be coated when most tiles remain sound and strong enough and the underlying structures are in good condition. A widely cracked, crumbling or structurally damaged roof is not a suitable coating base and needs repair or replacement.
The roof may need replacing when many tiles are fragile or broken, the covering no longer protects the structure, or the underlay and roof structure are extensively damaged. Coating protects a serviceable surface but cannot repair a weak structure or a roof covering at the end of its life.
Broken roof tiles are replaced and gutters can be cleaned during the project when these tasks are included in the agreed scope. Quantities and any other repairs are listed in the quote so the work content is clear in advance.
Moss can return over time when moisture, shade and organic matter accumulate on the roof. Regular inspection, removal of leaves and loose debris, and functioning drainage help slow new growth.
Inspect a tile roof at least annually and after severe storms or an exceptional winter. Check for broken or displaced tiles, organic growth, penetrations, ridge details, gutters and visible signs of underlay problems.
An initial tile roof cleaning or coating estimate can often be prepared from photos, the address, roof area and basic details. Send views of every slope and close-ups of growth, broken tiles and worn surfaces with the quote request.
Solar panels can be worthwhile when the system is sized for the property’s electricity use and the roof has enough suitable space with limited shading. The financial benefit depends largely on how much of the electricity you use yourself, so the same payback period cannot be promised for every property.
The installed price depends on system power, panel count, inverter, roof, mounting method, cable route and electrical work. Current size and price examples are available on the solar panel price page, while the exact total is confirmed in a property-specific quote.
We size the system using your annual and daytime electricity use, likely future needs, roof direction and pitch, shading and available roof space. The solar calculator provides a starting estimate, while final sizing is checked against the property details.
The roof should be inspected and maintained where necessary before solar panel installation. If cleaning, painting, coating or repairs are likely within the next few years, completing them first usually avoids removing the panels later for roof work.
Solar panels can be installed on both metal and tile roofs when the mounting method is selected for the roof material, structure and loads. Roof condition, fixing points, penetrations and safe installation are checked before work begins.
Solar electricity used in the property replaces bought electricity, including transfer charges and taxes, so it is usually worth more than surplus power sold to the grid. Production should therefore be matched to daytime use and, where practical, directed to water heating, cooling or vehicle charging.
Turnkey installation includes the agreed system design, panels, inverter, roof-specific mounting hardware, mechanical installation, electrical work, protection devices, measurements, documents and commissioning. Sun-Laatukatto also carries out the electrical work itself and does not outsource the project; the exact delivery scope is listed in the quote.
A standard grid-connected solar system shuts down for safety during a power cut even when the sun is shining. Using solar power during an outage requires a separately designed backup or island-mode solution with compatible equipment.
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