Hi everyone,
I use a Four Seasons sunroom as a greenhouse. The glass is clear and during
the summer I use about 55 % shade cloth. It is getting very hot during the
summer and in addition some of the plants still burn near the glass. The
orchids I have to grow on the floor.
I like to change the roof glass to a darker shade thus avoid using any shade
cloth.
Four Seasons have 2 types of dark glass:
MC 56 with 0.38 shading coefficient and
MC 16 with 0.18 shading coefficient.
Clear glass has 0.99
Is any one in the group using one of Four Seasons glasses and could provide
some info.
MC 16 may be too dark? Will MC 16 provide enough shading to avoid any plant
damage? Any ideas what percentage of shade a "0.38 shading coefficient"
provides????
The term is confusing to me.
Here is their explanation of a shading coefficient:
Shading coefficient (SC) : A measure of the ability of a window or skylight
to transmit solar heat, relative to that ability for 1/8-inch clear,
double-strength, single glass. It is being phased out in favor of the solar
heat gain coefficient, and is approximately equal to the SHGC multiplied by
1.15. It is expressed as a number without units between 0 and 1. The lower a
window's solar heat gain coefficient or shading coefficient, the less solar
heat it transmits, and the greater is its shading ability.
Another thought would be to alternate rows of MC 16 and MC 56 on the roof.
Thanks in advance for any help.
Siegrid Stern from Michigan
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