Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
at their roof
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "at their roof" is correct and usable in written English.
It can be used when referring to something that is located on or at the top of a building or structure. Example: "The birds were nesting at their roof, enjoying the warm sunlight."
✓ Grammatically correct
News & Media
Wiki
Science
Alternative expressions(20)
on the rooftop
at their home
at their address
in their house
in their residence
at their shelter
at their abode
at their parliament
at their detention
in their dwelling
in their household
at their house
at their estate
at their place
at their cottage
at their floor
at their villa
at their residence
in their home
on their premises
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
3 human-written examples
At their roof lines, carefully carved wood vigas — the ceiling beams — protrude, and red-pepper ristras dangle.
News & Media
One family we meet in a house that borders the Israeli side of the city show us bullet holes in their water tank, caused by IDF soldiers taking pot shots at their roof.
News & Media
Not many people look at their roof on a regular basis so watch for rusty metal that has been painted, tiles patched with lead or damaged roof framing propped up in the roof space.
Wiki
Human-verified similar examples from authoritative sources
Similar Expressions
57 human-written examples
To take advantage of the sun's energy to satisfy our ever-increasing need for electricity, Americans will have to take a fresh look at their roofs.
News & Media
After near-terminal administration in 2005 they were entitled to raise their roof at the final whistle on Saturday.
News & Media
"Our colleagues at NBC Channel 7 … their roof is gone," announces an off-camera voice (the station later learned that the NBC affiliate's roof was actually intact).
News & Media
The measure builds on existing Californian state law which requires all new buildings to have at least 15% of their roof space exposed to sunshine, in order to allow for future solar panel use.
News & Media
In Colorado, the longwalls of the North Fork Valley (NFV) also work at great depth, but their roof and floor strengths are moderate, and most bursts have occurred during entry development or in headgates, bleeders, or other outby locations.
Don't forget to look up – to the roof that is – many home sellers never look at the condition of their roof, but it's something buyers will notice.
News & Media
In all the three areas, the households potentially owned their own roof, and at least one side of their roof would be optimal for photovoltaics.
That has not been helpful because people stay at home and protect their roofs and front doors," says Mark Batey, chief executive of the Film Distributors Associationn.
News & Media
Expert writing Tips
Best practice
When describing actions or events occurring on a roof, ensure the preposition accurately reflects the intended spatial relationship. "On" is more suitable when referring to the surface, while "at" is better for a general location.
Common error
Avoid using "on their roof" when the intention is to indicate a general location near or around the roof area. Using "at their roof" provides a broader sense of proximity, while using "on" restricts the meaning to the surface of the roof.
Source & Trust
82%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "at their roof" functions as a prepositional phrase modifying a verb or noun, indicating the location where an action occurs or a state exists. Ludwig AI indicates that is correct and usable in written English.
Frequent in
News & Media
33%
Wiki
33%
Science
33%
Less common in
Formal & Business
0%
Encyclopedias
0%
Social Media
0%
Ludwig's WRAP-UP
The phrase "at their roof" is a grammatically sound prepositional phrase used to indicate a location near or around a building's roof. Ludwig AI confirms its correctness and usability. While examples are limited, the phrase appears in various contexts, including News & Media, Wiki, and Science. Alternatives like "on their roof" or "near their roof" offer similar meanings, depending on the intended spatial relationship. When employing this phrase, consider the context and ensure it accurately reflects the intended location. Overall, while not exceedingly common, "at their roof" is a valid and useful phrase in English writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
on their roof
Replaces the preposition "at" with "on", indicating a surface location.
atop their roof
Uses "atop" to convey a higher, more elevated position on the roof.
at the roof of their building
Adds specificity by mentioning "building", clarifying what possesses the roof.
on the rooftop
Uses the compound noun "rooftop", indicating the top surface of the roof.
on top of their roof
Emphasizes the position being on the highest point of the roof.
by their roof
Indicates a location near or adjacent to the roof.
near their roof
Similar to "by their roof", suggesting proximity.
close to their roof
Specify it's near their roof
by the side of their roof
Specify it's on the side and near their roof
above their roof
Indicate a location over the roof
FAQs
How can I use "at their roof" in a sentence?
You can use "at their roof" to describe a location near or around the roof of a building. For example, "The protesters gathered "at their roof" to voice their concerns."
What's the difference between "at their roof" and "on their roof"?
"At their roof" indicates a general location near the roof, while "on their roof" specifies a location on the surface of the roof. Use "on" when something is physically positioned on top of the roof.
Are there alternatives to using "at their roof"?
Yes, depending on the context, you could use phrases like "near their roof", "by their roof", or "on their rooftop" to convey a similar meaning.
Is "at the building's roof" the same as "at their roof"?
"At the building's roof" and "at their roof" can often be used interchangeably, but "at their roof" implies that the building belongs to the people you're referencing. Using "at the building's roof" is more general.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
82%
Authority and reliability
4.1/5
Expert rating
Real-world application tested