Armed Polite Society

From the comments:

I've been a roofer 36 years. I've found people living in these signs on roofs more than once.

I could see that. They're enclosed, secluded, have electricity, and even the old, fluorescent lights last long enough you could go a long time without anyone thinking to look inside.

Again, single flat double pane window and more - much more - heat than direct sunlight.

A simple flat reflector won't focus light.

Reflections from the windows burned people at a pool at the Vdara hotel, a high-rise in Las Vegas.

The wall of windows at the Vdara hotel is not flat. Overlapping reflections from MANY windows concentrate sunlight.

The windows on a London skyscraper were blamed for melting part of a Jaguar XJ.

The wall of windows at the London skyscraper is not flat. Overlapping reflections from MANY windows concentrate sunlight.

The things you learn from wikipedia

Did you know ...
... that women were 33 percent more likely than men to search for clown pornography in 2016?

I could have lived without knowing that even existed

AOC Demands To Know Where Alito Bought An Upside-Down U.S. Flag
https://babylonbee.com/news/aoc-demands-to-know-where-alito-bought-an-upside-down-us-flag





Babylon Bee
I know, it's hard to tell sometimes 

you'll note some insolation, but necessarily LESS than from direct sunlight.

Again, single flat double pane window and more - much more - heat than direct sunlight.

Understanding the Problem
The Science Behind the Reflection
Low-E windows, designed for energy efficiency, inadvertently create hot spots due to their reflective properties. These windows can act as magnifying glasses, focusing the sun's rays onto a small area, which can significantly increase the temperature of the surface it hits.

The Impact on Different Surfaces
Siding: Various types of siding, particularly vinyl, are susceptible to warping and melting when exposed to high temperatures.
Artificial Turf: Synthetic materials in artificial turf can melt or deform, altering the appearance and functionality of the landscaping.
Other Surfaces: Concentrated reflections can also affect automobiles, patio furniture, and other outdoor items.

Reports show the coating used on the windows to reflect the sun, combined with a concave effect in some windows, magnifies and intensifies the beam up to 200 degrees Fahrenheit. The problem is worse in late fall, winter and early spring due to the low angle of the sun.

Problems with low-e windows have been reported across the country. The beams have melted vinyl siding, plastic and paneling on cars and garbage cans. Reflections from the windows burned people at a pool at the Vdara hotel, a high-rise in Las Vegas. The windows on a London skyscraper were blamed for melting part of a Jaguar XJ. The Consumer Product Safety Commission said beams from sunroom roofs have started fires on cedar shingles in at least four homes.