# Inclination, direction, and sunshiny of the span roof

I painted the slate warehouse in the country home and the main building of the cement tile in DIY. At that time, it was anxious that there were quite a lot of mosses in the tiled roof that flowed to the north side compared with the south. It thought about the inclination, the direction, and sunshiny of the span roof from the growing condition of the moss.

In conclusion, the shape of the house seems to be long from east to west, and to settle down naturally in the one with a loose inclination that the roof turns to the south and the north also the building in east and west in a general span roof in Japan.

## What is the span roof?

As the roofing geometry of the house, the span roof is shape of the roof that two slanted rooves of which the top part is the building were suitable and the triangle when seeing from the side in general form. The shape of the roof greatly controls the impression in the entire house. The span roof is very simple compared with "Irimoya-zukuri" with a profound feeling and "Yosemune-zukuri" etc. of the smart shape. There is a feature that it is comparatively cheap in a lot of kinds of roofing geometries that are, makes easily, and the leak in the roof is few.

## The inclination of the span roof (from sunshiny of roof)

This time, I thought that it was one of the things that the cement tile and the slate roof were painted and sunshiny of the roof is important. There will not be sunshiny at all at winter solstice in the Sanyo region in the roof of the flow of about 32 degrees or more on the north side the hanging of a roof.   (The height of the sun of about 23.5-degree culmination because of   winter solstice : the inclination of about 34.5 degrees and earth's axiss to latitude the reference and around here   90- (34.5+23.5) =32 degrees.)

When the hanging of a roof is not adjusted to about 32 degrees or less to secure sunshiny of the roof of the flow on the north side, it doesn't become it. Sunlight will barely strike into the roof on the north side of about winter solstice in this case because the inclination of a general tiled roof is about 15-30 degrees.   (In reference and three-'sun' inclination (3/10), 16.7 degrees and five-'sun' inclinations (5/10) are 26.6 degrees.)

In the roof of "Yosemune", It should make the inclination of the roof loose. Actually, It's inclination of "Yosemune" is loose in Japan.

## The direction of span roof (from sunshiny of roof)

You might move the direction of the house to the east or the west a little for the south when thinking only about sunshiny of the roof on the north side of the span roof where the building becomes it from east to west. When the house is made a little in the viewpoint that secures sunshiny of the roof on the north side in the house in the valley in the mountain for the west when sunshiny in the morning is good, and sunshiny in the evening is good, I think that you should make the house a little for the east. (Strictly speaking, my home of the country is by chance for the south-southeast than this latter.)

I think that you should turn to the east and the west of the roof because I make the building the south north to just make sunshiny of the span roof even. It strikes in the roof on the east side in the morning and sunlight strikes into the roof on the west side in the afternoon if it does so.

## The direction of "Gassyou-zukuri" roof of Shirakawago

The building flows the Gassyou-zukuri roof of Gifu Prefecture Shirakawago of World Heritage and a thatched roof flows to the east and the west in the south north. The roof is a rapid ascent of about 60 degrees. The spectacle suitable for the direction where the roof in a peculiar form is the same is spectacular.

This reason is related to the pain condition of the roof. The building strikes and sunlight doesn't strike into the roof that flows to the north side at all if the roof flows to the south and the north in east and west. Therefore, the roof for the north side is always damp, grows the moss, and doesn't last long by the roof.

## The direction of roof (from shape of house)

As for the house in general Japan, the shape of the house is long from east to west from the relation that improves sunshiny of the room. It is general that the building becomes from east to west, and the roof flows to the south and the north. (The main building of my home is almost this form.)

The building is long from east to west the shape of the house, and grows, and the roof rises inevitably when the roof flows to the east and the west in the south north and the attic grows. There is impossibility designing, and a lot of materials for building construction are necessary for this. It might be good to make the attic. There is no problem in respect of sunshiny because the roof of the east flow and the roof of the flow in the west are the same as sunshiny of the roof at all.

## Conclusion

After all, the shape of the house seems to be as long from east to west as that of my home, and to become loose in east and west in the house in a general span roof in Japan also the building of the inclination that the roof turns to the south and the north. I think it is good when the roof for the south is used for the photovoltaic generation.

It can be said to the south north that the shape of the house is reasonable that the roof flows to the east and the west in the building in the south north when it is long from the relation of the site.