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Frequently asked questions about exterior painting

Must rust always be removed before painting a metal surface?

Must mould always be removed before painting a surface?

The socle of our house was painted a couple of years ago. A light-coloured, "frost-like" layer developed on the surface, and the paintwork cracked and peeled off in places. What is the problem?

I repainted the internal doors of our home in an outdoor shed using Empire Furniture Paint. It has been several days now, but the paintwork is not yet completely dry. Is there something wrong with the product?

On the last day of my holidays I worked long hours to finish painting my house on time. The paint I used was oil-based Teho. The surfaces that I painted last were clearly duller than the surfaces painted earlier. What went wrong?


How should I repaint my PVC-plastic coated tin roof where the coating is partly peeling off?
A plastisol coating can be repainted with Tikkurila Repco Roof Paint, either by brushing or by spraying. You should first check how well the plastic coating is attached across the whole roof area by means of X-incision tests. If adhesion is poor over large areas, repainting on top of the coating is not recommended. The coating should instead be removed.

Remove loose or poorly attached patches. Clean the roof with Tikkurila Panssaripesu Roof Cleaning Agent as instructed on the label. Apply a coat of anti-corrosive Rostex Super Metal Primer to clean the metal surfaces. Finally, apply a top coat of Repco.


I have a new concrete floor in my garage that I would like to paint. How should I do it and with what?

I am building a new log cabin by a lake. I’ve been wondering about surface treatment. When should a new log building be painted and what products should be used for this purpose?

How can I find out what type of paint has been used to paint the timber cladding on my house?

What paint should I use to paint the floor and handrail of a new terrace made of pressure-impregnated timber?

What is the best weather for painting outdoors?

The roof of our house was rebuilt and covered with zinc-coated metal sheeting. When can I paint it?

Why have the colour of the external walls of my house changed over the years?