Should I leave my blinds open or closed in the winter?
So, should blinds be up or down in winter if you're struggling to get enough natural light? Open definitely; but as soon as it gets dark, you might want to think about closing them as the benefit of allowing the light in will have passed, and your closed blinds will then help you to conserve heat.
In the winter, if you have south-facing windows, let the light shine in. The sun will help heat your home naturally, which takes some pressure off your furnace. For other windows, keep blinds and curtains close during the winter to keep heat inside your home.
Yes, all blinds help to keep the warmth on the inside (assuming that the issue is heat loss from the windows rather than generally poor insulation) but some types of blinds are much better at this than others.
You can keep direct sunlight out of your home and decrease solar heat gain by closing the blinds. In the winter, closing window blinds can also help save electricity. Heat is lost through windows on cold days. Closing the blinds help to insulate the windows and reduce heat loss.
The answer is 'yes', certain types of blinds will trap a layer of air between the fabric and the glass, helping to keep out the cold coming in from your windows. Professionally fitted thermal blinds can be an energy efficient way to keep the heat in and the cold out.
Closed blinds serve to deflect the sun (and so, heat) before it gets into the room, which reduces unwanted solar gain and helps to keep your home cooler in turn.
When blinds are closed with the slats turned up and the rounded side facing out, the heat is directed towards the ceiling, which helps keep the room cooler.
Fabric blinds are the most effective at keeping the cold out. Venetian blinds with slats, for example, are better for the summer because they allow heat to escape between the slats.
During this research, one company found that drawing your blinds in the evening can reduce heat loss by as much as 14%. And, if you decided to pair your blinds with curtains, you could further reduce this by an additional 17%. So yes, closing blinds really does help you to save energy!
Privacy: Blinds provide an effective way to control the amount of privacy in a room. By adjusting the slats or pulling them completely closed, individuals can prevent outsiders from seeing inside their homes or offices.
Why you should stop closing your blinds during the day?
While you may be focused on removing the dust in your home, according to an article published in Science Daily, letting the sunshine into your home through the windows can actually kill bacteria that live in the remaining dust and this can help decrease the risk of respiratory issues.
When completely closed, highly reflective blinds can reduce heat gain by around 45 percent, says the DOE. They can also be adjusted to block and reflect direct sunlight onto a light-colored ceiling, which diffuses the light without much heat or glare.

If it's winter and likely to be sunny, open the window coverings in the morning to allow the sun to heat your home through the day—especially those that receive direct sunlight. In the summer, you may want to keep window coverings closed to reduce heat gain.
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Vertical blinds are the best blinds for winter because they have vanes that can be adjusted to direct sunlight away from your home. This helps keep heat in and keeps your house warmer during colder months.
Around 18% of the total heat within a house is lost through the windows. This heat loss through windows is caused by radiation through glazing, convection and conducted through the window frame.
Leaving your blinds or curtains slightly open will also help suppress melatonin production, helping you to resist 10-minute snoozes.
Some people work at night, sleep during the day, and sleep better in the dark. Some people do not want their upholstery to fade. Some people prefer to watch television in a darkened room. Some people are trying to keep their homes cooler by blocking the sun.
For the best effect you should pull up blinds during the day to allow sunlight in to warm the home. In the evening, as soon as the sun sets, the blinds can then be pulled down. With the blinds shut, warm air from the natural sunlight and your mechanical heaters won't escape from the home.
Open Curtains and Blinds
It's important to note that windows covered by blinds and curtains are more likely to experience condensation. This is because there is reduced airflow getting to the surface of your window, trapping the humid air between the window treatment and the glass.
What blinds are best for keeping house warm?
Blockout roller blinds
If you're looking to make your home as private as possible, and stop heat and light from entering your home, then blockout blinds are the perfect solution. They are some of the best shades to keep heat out of your room because they prevent solar rays from entering entirely.
The best blinds for winter are roller blinds, because this type of blind has one sheet of fabric. This means that there are less gaps for heat to escape through when you close the blind. It also means that when you fully open the blind, it lets as much light in as possible.
Privacy. They don't want people being able to look in windows and see them. This is especially true if your windows are a direct line of sight into a bedroom or bathroom, where people are generally naked or in the process of getting ready.