Keeping the blinds close block most of the light but sometimes blind slats can let a little amount of light to enter your home through the gaps between slats.
Can wooden blinds block out light.
With a standard wooden venetian blind there are 2 main areas that the light will come through.
While shades are made from fabric blinds have slats made of wood faux wood aluminum or other materials that let light penetrate more easily.
Although there are some blinds with fold flat slats that close tighter to block more light if you want to block a lot of light you re better off with shades.
Side channels are another great option to block out the light from the side of the window frame.
All blinds with slats will let in some light through the spaces between slats.
Wood blinds are made of different slat sizes which include 2 inch 1 inch 2 inch and 2 inch.
Most people choose venetian blinds because of their unique ability to diffuse or block out light to varying degrees thanks to the way the the angled slats can be finely tweaked.
True blackout shading as it s known is only possible with a proper blackout blind.
Do your blinds or shades let in light from the sides.
Whenever you want more privacy or want to block out the light you can simply have the blinds on with the slats fully extended.
However you can t achieve total blackout with a venetian blind.
In the window covering world we call these light gaps these gaps exist because blinds and shades can t be made to fit perfectly tight to the sides of the window.
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These are the perfect complement of your window blinds that can add a smooth finishing to the windows.
You can pull up the blinds or adjust the slats to allow more light to enter the house.
The channels create an opaque barrier to prevent any light that tries to stream through the edges.
Light filtering blocks most light but not as much as blackout shades.
Link to other question.
Are faux wood blinds room darkening.
Unlike blackout curtains which install over a window in front of any blinds however blackout shades install inside the window frame which makes it possible to hang the shades behind wood blinds.
Hence one of their major advantages is that wooden venetian blinds are the best at blocking out light which become a must especially when someone needs to sleep during the day or when you have very strong streetlights close to your bedroom window.
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The wooden blinds hence provide you with a lot more flexibility in terms of light control.
If you want shades that block light you should consider blackout shades for the most light control.