On Mon, 1 Feb 2016 02:16:56 -0800, T wrote:

On 01/31/2016 08:14 AM, Micky wrote:
On Sat, 30 Jan 2016 22:39:56 -0800, T wrote:

Hi All,

I have a sliding screen door on a sliding glass door.
Is there a such thing as an opaque screen door material
that I could replace the screening with? I want no
light, but I want air flow.

Many thanks,
-T

I think light is smaller than air, so something simple is unlikely.

But light travels, generally, in a straight line, while air can bend,
so maybe you can mount two grids that are offset from each other.


I wonder if I could keep them lines up ...

Thank you for the help!

I forgot. What you want are venetian blinds. That's what they
were designed to do. Most people lose track of this because when
they close the blinds, they do so putting the concave face facing
downwards. So light continues to come through until the last bit of
adjustment, and even then some will come through.

Instead, the blinds should be adjusted in the other direction, so the
convex side faces the light, which most of the time is above, not at
the horizon. When the slats are at a 45^ angle, there will still be
an inch between each slat. The breeze will just have to go up over
the slat, but the light won't do that.

When the sun is very near the horizon, closing the blinds in the other
direction might be good, not sure.

Do you have to get horizontal slats for this to work?. Levelor
started off by pushing vertical slats, and I just assumed they were
trying to be different and weren't really concerned with fulfilling
all the abilities of horizontal slats. On the theory that women
wanted "window treatments" unrelated to practical needs. And they do
(still in my mind) make a house look modern, but do they keep out the
sun while letting in the breeze? The sun is at different latitudes
through out the year, so one will have to remember where the sun is
going to be when adjusting them. OTOH, that wouldnt' be true with
horizontal slats. Also I know vertical slats close more than enough
in one direction, but do they close at all in the other direction? If
the most they go in that direction is perpendicular to the window, or
a little farther, that's not enough.



I have no idea what they cost these days, and there are probably many
styles, with metal** slats, wood slats, different kinds of tape, so
what you might do is buy a blind 2, 3, 4, 6 feet wide, even though the
door can open wider.

**Metal, though not high fashion I suppose, has the advantage of
weighing less (easier to mount, easier to pull up) and being curved.
I'm not sure why I think so, ????, maybe because I like anything old
and dislike most things new, but curved seem more likely to work well
here. ????

Here are a couple webpages that confirm what I already knew:
Well, I only found one, and it wasn't sure. Maybe I am the only one
who knows this.
http://retrorenovation.com/2014/04/0...zontal-blinds/
I didn't read the comments.