Sundown CoatingsFree roof assessment

How it works / one house, one afternoon

The afternoon your air conditioner takes control.

One hot house, one August afternoon. Before the roof changed, and after.

Start at two o'clock Get my free roof assessment

Your air conditioner is fighting the ceiling.

It has been losing that fight since eleven o'clock.

01 The losing fight

Two in the afternoon, and the air conditioner is losing.

It has been running since eleven and it is still behind, because the roof is feeding the house faster than the unit can empty it.

Thermal comparison of two identical roofs in the same hour: the untreated surface runs far hotter than the coated one.
Same roof type, same hour. The untreated surface is the one feeding the house.
2 PMThe worst hour

Peak sun lands overhead right after lunch.

Flat outWhat the unit does

Running non-stop and still behind.

OverheadWhere the fight starts

Not the windows. The roof.

TomorrowThe rematch

Same load again, before today's has left.

02 The surface changes

Change the surface, and the fight changes size.

Same sun, same two o'clock — most of it now turns away at the roof instead of soaking into the deck.

Published Sundown roof coating properties: 0.88 initial reflectance, 0.89 thermal emittance and 0.74 three-year reflectance.
Producer-published values for the coating — not a prediction about any particular house.
0.88Initial reflectance

Published producer value.

0.89Thermal emittance

What soaks in goes back to the sky.

One dayWhat it takes

Measured, coated, checked. Nobody moves out.

0.74Still, at three years

The published aged value.

03 The crossover

Now the same air conditioner can take control.

Nothing downstairs was replaced; the fight upstairs got smaller, so the unit you already own gets to cycle instead of run.

Building cutaway showing less heat crossing the roof assembly into occupied rooms, and the air conditioner cycling instead of running continuously.
The useful outcome is inside: the unit stops fighting the ceiling and starts holding the house.
CyclingNot chasing

The unit reaches temperature and rests.

SetpointReached and held

The back bedroom rejoins the house.

11–27%EPA, peak cooling demand

Category research on reflective roofs. Not our promise.

Same ACNo new equipment

Nothing downstairs was replaced.

04 The evening after

By sundown, the house lets go of the day.

The structure has less of the afternoon to hand back, and the day it changed is on paper: batch, readings, photographs, closeout.

Six-stage Sundown roof record process from measured roof file through substrate review, repair, weather gate, controlled build and closeout.
One afternoon of work becomes one permanent roof record.
SundownThe house settles

Less of the day held in the structure.

FiledPhotos and readings

Same measurement points, before and after.

BatchTraced to the pail

Your roof ties back to its bucket.

YoursThe closeout

You hold it at resale or refinance.

Two o'clock, three panels

Your roof, the short version.

The pain

Sun all day, ceiling all night.

The biggest surface you own soaks up August and hands it down to the rooms underneath.

The fix

Roll on a bright lid.

Two to three coats go on the roof so most of the sun turns around where it lands.

0.88published initial solar reflectance

What you keep

You keep your air conditioner.

Nothing downstairs gets replaced, and the afternoon it changed stays on paper with the batch number.

$445a five-gallon bucket, plus shipping