How to Memorize

sales/productivity have gone through the roof

Analysis

Something or someone that 'goes through the roof' increases quickly to a very high level. This is an idiomatic expression you can hear in both social and professional contexts.

Social Examples (Advance)

1. When I told Daniel that I had damaged his car he went through the roof! Hopefully, he'll accept my apology after he's had a chance to calm down.
2. The cost of living in the city has gone through the roof in the last few years.

Professional Examples (Advance)

1. Replacing the outdated machinery in our factories has made a big difference. Productivity has gone through the roof!
2. Sales of the product have been going through the roof ever since we launched our new advertising campaign.

Further Suggestions