Mark McCaughreanReflections on geometry 🪟🪩
V Martín@markmccaughrean thanks for the childhood memories, those shutter patterns... 😉
btw, you missed an s in your abstractArt tag
@sharponlooker Ah, thank you – fixed.
As for Rolladen, my experience from living here in the 1990s is that they are a simple but very effective tool, both as curtain replacements, but also as external shutters, preventing light from getting into a room & heating it up via the greenhouse effect.
Blinds on the inside of windows are less effective & I can’t help thinking that Rolladen should become more common further north as Europe inexorably heats up.
@markmccaughrean I can say I miss them a little when nights start to get so bright here from May onwards, or when we get those now not so uncommon summer heatwaves. But aesthetics prevail 😉
Knud Jahnke@markmccaughrean @sharponlooker
I think they are a relic of when windows were badly insulated and one needed to choose between insulation and light. They need to go!
Today, with triple/quadruple glazed windows, insulation isn't a problem anymore, they are sometimes better than walls.
Solution against radiative heating: in German "Außenraffstore" = blinds outside.
E.g. https://aussenraffstore.de
Up = all light and heat, down and slightly tilted = some light but no heat, down = dark-ish
@knud @sharponlooker I'm all for newer tech, but I wouldn't discount Rolladen completely. You can partly modulate the light they admit using the gaps, as in my photo, & any window that transmits visible light & works as a good insulator is going to suffer from the greenhouse effect. Given their more monolithic design, I'd imagine that Rolladen might work better as storm shutters than external venetian blinds. I mean, yes, the latter are much prettier, but also more complicated / failure prone.
@markmccaughrean @sharponlooker
The light-modulation aspect ... is limited and the radiation modulation is mainly a question of direct vs indirect sunlight. Not much energy comes in without direct sunlight.
For the durability aspects I agree, although we have 10yrs w/o much trouble.
@knud @sharponlooker Good to know. If & when we get over being exhausted from this move & start looking around to buy or build, this is useful advice to keep in mind.
But much like I'd avoid electric Rolladen, I'd probably also avoid external blinds that automatically deploy and/or tilt to match the sunlight – I've seen that cause plenty of trouble in the past.
@markmccaughrean @sharponlooker
Yeah, don't. We even opted against a storm-sensor, bc formally they are only rated to I think 6 Beaufort. But a) this is the lowest wind region of the country, b) even for stronger winds there really were no issues. We leave them up at night maybe 1 night a year. Ours make a slight clanking noise with more wind, but that's about all.