Sliding, Terrace and French Door Window Treatments
A door gets used. The treatment has to clear the handle, stack off the opening, and survive being pushed past twice a day.
Nobody walks through a window
A shade on a window is asked to go up and down. A shade on a door is asked to do that and then get out of the way, several times a day, for years.
Almost everything that goes wrong on a glass door comes from treating it as a tall window. The treatment fouls the handle. It hangs across the opening so you push past it every time you go out. It swings when the door moves. Or it stacks in the wrong place and you lose half the doorway.
None of that shows up in a photograph, and all of it shows up on day two. It is why doors are worth measuring in person with the door open, closed and mid-swing, rather than from a number written on a form.
To be clear about what we do: we fit treatments on the inside of the glass. We do not do awnings, pergolas, exterior screens or outdoor shading. If that is what you need, we are not the right people and would rather say so now.
The thing that catches everyone out
A door handle sticks out about two inches into the room. A shade or blind mounted inside the frame sits in exactly that space, so it either rubs on the handle every time it moves or it cannot come down past it at all.
There are three honest answers and the right one depends on the door. Mount outside the frame, on the wall above, so the treatment hangs clear of the handle entirely — usually the simplest. Use a product that stacks sideways rather than dropping past the handle, which is what panel tracks and verticals do. Or, on a french door, fit a shade to the door leaf itself and hold it at the bottom as well as the top so it travels with the door and never meets the handle.
What does not work is measuring a door like a window and hoping. That is the single most common reason a door treatment gets replaced within a year.
Where it stacks decides whether you like it
On a door, the important measurement is not the drop. It is how much of the opening is still clear when the treatment is open.
Panel tracks and vertical blinds move sideways, so they gather into a stack at one end. Put that stack over the fixed pane and the doorway stays completely clear; put it over the moving leaf by mistake and you have narrowed your own door.
Drapery works well on a glass door for the same reason, provided the track runs well past the opening on both sides so the fabric can pull entirely off the glass. A curtain that stops at the edge of the door frame looks fine closed and is a nuisance open.
The shade should travel with the door
French doors are their own problem, because each leaf is mostly glass and each leaf moves. A shade hung on the wall above covers both doors and stops you using either one without lifting it first, which nobody does for long.
The right build is a slim shade fitted to each door leaf and held by a bracket at the bottom as well as the top. It swings with the door, it never swings loose, and both doors keep working normally. Cellular and slim roller fabrics suit this best because they take up very little depth when they are up.
The handle matters here more than anywhere, and so does the depth of the glazing bead — there is often less than an inch to work with. It is measurable, but it has to be measured on the actual door.
In an apartment, that door is the only way out
A terrace or balcony door is not a spare window. It is the only access to the outdoor space you are paying for, it gets used every day in summer, and it is usually the first thing you see from the room. Anything fitted to it has to be easy enough that nobody resents it.
That normally rules out a treatment you have to raise fully before you can pass. It favours something that pulls to one side and stays there — a panel track, a vertical, or drapery on a track that clears the glass. If the door is also on your view side, a solar fabric keeps the outlook while cutting the heat and glare, and that matters more on a door than a window because the glass runs all the way to the floor.
Your building will want a Certificate of Insurance naming the corporation and the managing agent before an installer is let in. We file it before we arrive. Where house rules specify what faces the street or the courtyard, send us the clause and we will work inside it.
A glass door is the coldest thing in the room
It is a large area of glass running to the floor, so in winter it radiates cold and sets up a draught along the floor even when it is sealed properly. Cellular fabric helps most here, because the honeycomb traps a layer of air against the glass — the same principle as double glazing. On a door, a side channel or a close outside mount is what stops the cold air spilling round the edges.
In summer the same area works against you. West-facing glass doors gain a lot of heat, and a solar fabric stops it at the glass while keeping the view out to the terrace.
Privacy is the one people underestimate. During the day a solar shade lets you see out and stops others seeing in. After dark, with the room lit, that reverses completely and the door becomes the brightest thing on the courtyard. If the door faces a neighbouring building, a shared terrace or a courtyard, plan for a second denser layer for the evening rather than discovering the problem in week one.
What people ask us about doors
What blinds are best for a sliding glass door?
Something that moves sideways rather than up and down: a panel track, a vertical blind, or drapery on a track. All three stack clear of the doorway so you can walk through without touching them. A single wide roller shade works too, but it has to be raised before the door can be used, which in practice means it stays up.
How do you get round the door handle?
Three ways, depending on the door. Mount outside the frame so the treatment hangs clear of the handle. Use a product that stacks sideways and never passes the handle at all. Or, on a french door, fit the shade to the door leaf and bracket it top and bottom so it travels with the door. Measuring a door like a window is the usual reason this goes wrong.
Will the blinds block the doorway when they are open?
Not if the stack is planned. Panel tracks and verticals gather to one end, and that end should sit over the fixed pane rather than the part that opens. On drapery, the track has to run well past the opening on both sides so the fabric pulls completely off the glass.
What works on french doors?
A slim shade fitted to each door leaf, held by a bracket at the bottom as well as the top so it moves with the door and does not swing. Cellular and slim roller fabrics suit it because they take almost no depth when raised. The glazing bead is often under an inch deep, so it has to be measured on the actual door.
Can I have curtains on a sliding or terrace door?
Yes, and they suit a door well because they pull entirely to one side. The requirement is that the track extends well beyond the opening on both sides. Floor length, just brushing the floor, and hung high and wide makes the door look larger and keeps the fabric off the traffic route.
Do shades help with cold coming off a glass door?
Noticeably, yes. Cellular fabric traps a layer of air against the glass and reduces the cold radiating into the room. Because a door runs to the floor, closing the gap at the edges matters more than on a window — a side channel or a close outside mount is what stops the draught spilling round.
Can you fit a terrace door in a co-op or condo?
Routinely. The building will want a Certificate of Insurance naming the corporation and the managing agent before an installer is let in, and we file it before we arrive. If the house rules specify what faces the street or courtyard, send us the clause and we will specify inside it.
Do you do outdoor or patio shades?
No. We fit treatments on the inside of the glass only. Awnings, pergolas, exterior screens and outdoor shading are not what we do, and we would rather tell you now than after a visit.
What about privacy at night?
A solar shade gives daytime privacy because outside is brighter than inside. After dark with the lights on that reverses and the room becomes visible. If your door faces a neighbour, a courtyard or a shared terrace, plan a second denser layer for the evening rather than relying on one fabric to do both.
We will measure it with the door open
We bring the samples to you, measure the door in use rather than on paper, and leave you with a written quote. Manhattan, Brooklyn, Queens and the surrounding boroughs.
Book a free consultation212.222.8288
500 7th Avenue, 9th Floor, New York, NY 10018 · Monday to Friday, 9am–5pm · Interior window treatments only