I put some on a South facing round window and it does cut down on the heat
coming in but I've been told the it is not good for double glazed windows as
it creates too much heat between the glass and shortens the life of the
seal. (It's been two years now and I don't have condensation between the
glass but time will tell.

When I had a problem with the heat and a sky light, I made a solar screen to
fit below the skylight for the hot months and removed it for the winter...
It did cut down on the heat in the Summer and we benefited from the heat in
the winter.

You don't get it both ways.

The LowE stuff helps both summer and winter. It blocks the heat from
coming in during the summer and keeps the heat in during the winter. Note
that is it keeps the heat in during the winter, not that it allows the heat
to come in during the winter.

To the best of my knowledge there is no way of DIY lowE.

--
Joseph E. Meehan

26 + 6 = 1 It's Irish Math


"hal" wrote in message
...
have a sun room with tilting skylight windows as well as floor to
ceiling windows.
thinking of applying my own reflective film to skylight windows to
reduce heating in summer but still would like to have the warming
effect in the winter.
is there any happy approach to have both and is it possible to DYI.