In the past the roof of the wooden houses are made of palm leaves. Because of frequent fire incident, today's wood houses have roof made of metal sheets which in Indonesia are called daun seng. Ordinary thin corrugated metal roof is actually not suitable for house construction in Minahasa whose atmosphere is often filled by sulphur emitted by the volcanoes but the local people there do not have other option. Actually the manufacturers of the metal roof need to produce metal roof sheets that are more resistant to corrosion caused by high sulphur content in air.
Today the Minahasan wooden houses are being exported in the form of knock-down package that can be ordered directly from the internet and shipped in containers. House builders will be sent to help the buyer of the house construct the package.