What angle of shading should be used for south facing windows.

Should a window be fully shaded by slats or a canopy/ verandah at mid day from June to the end of August or what and how?

Tony

Fixed shading definitely needs to achieve quite a lot, some seasonal adjustment I think would be needed to make best use of winter sun. You can do basic calc's with pen and paper if you know when (time of day and year) you want to have the most shading. Have you thought about deciduous planting, which is a very elegant way of providing seasonal shading, I have also often thought that movable shades could combine somehow as insulating night shutters...

Also worth considering the effect on internal light patterns of solid shading and slatted shades, just from the point of view of the feel of the space.

It also all depends as you know on the level of exposed thermal mass in the building as to how much summer sun you want to moderate and at what time in the day, also feeding in is the type of building ie occupancy patterns and occupier control levels.

If a domestic situation I would imagine that it could be very useful to build in structure for variable shading, and then experiment with some ply mock ups during the first couple of seasons, otherwise the variables of building design, construction, local climate, internal light quality and varying occupant needs could all render any subtleties of shading design somewhat irrelevant.

J

Yeah, like I think there was one day this summer when we needed shading. But I was out so I wasn't bovered.