Facade design calculations

Dear All,

This is my first post to the forum.

If this post not intended for this forum or any one finds any mistakes request to excuse me.

I am technical volunteering for a charitable institution. They are in the process of designing facade for a new building.
I need to help them in terms of deciding the facade shade thickness and type of material.
As per a consultant design, one feet of facade is costing $70 which is to costly them. So they asked me to find the optimum shade thickness so that some saving they can do.

Request you all to please help me. I have the following data.

Horizontal and vertical sun path charts
Latitude, Longitude (16.4349° N, 80.5688° E)
Azimuth and elevation data for any particular day ( sourced from the web)
The facade is inclined to 73 degrees on all sides.

I would like to know what factors determines the facade shade and type of material so that cooling load can be reduced inside the building.
Should I calculate the solar heat gain ?

I am not able to attach a ppt or doc file of the cad dwg.

Thanks,
Vijay

Hello Vijay and welcome.

I suggest you have a look at the following website - I believe it provides the information/calculation data you need. Note: it is for the SOUTHERN hemisphere, and will need adjustment for the north.

Shading You Home


Regards,

FA

Do I understand you correctly, that this is about shading the windows to avoid overheating? 14°N would suggest that…

In principle, anything that diverts the light away from the window will work, as long as it doesn't degrade under UV light. Cloth would be a good material.
Not sure how much shading you want, but you probably have to pick some time where you want complete shade and then use that angle to determine the width of the overhang.

Given that your night time and day time temperature vary by only 9F, likewise for winter vs summer.
Unless your building is made from metal, a external facade will not help with the internal wall temperature.
I recommend insulation, a R-30 value. Insulation is normally R-3 per inch, so 10inch for a R-30 value.
Reducing sources of humidity/hot stream (cooking, dishwasher,  shower, clothes dryer, etc), possible by venting will help even more.
Most people prefer a 80F at 50% humidity over 70F at 90% humidity.

Thank you all for the wonderful suggestions !!

Just I would like to attach the cad dwg for your referencing. pptx and docx are not able to be uploaded.

What format I can upload the screenshot of the dwg? Please let me know.

Thanks,
Vijay

Here the screenshot attached.

I have come across this website. Can this be useful for me for calculating solar heat gain calculation.


webpage

Thanks,

Is the overhand in the picture already build?

No Sebastian. This is an architectural drawing. You can see the overhang is 1 meter deep.

And the facade is inclined 73 degrees inclined outward on all sides. This is on all sides North, south, east and west.

It looks like you are asking for the R-Value of different type of facade material/insulation.
Foam/plastic type material usually have a R-3/inch. (1meter thick = R-118)
Wood type material have a R-1/inch. (1meter thick = R-39)
Stone/Concrete/Brick/Earth type material have a R-0.3/inch. (1meter thick = R-12)

For a more complete list check out the link below
https://en.wikipedia.org/wiki/R-value_(insulation)#Example_values