Air conditioning cools your residence dramatically, however it’s costly to put in and run. Plus, it is not precisely the prettiest factor in your yard. So, for these inexperienced occasions, we revisited the oldest house-cooling trick within the guide, white paint, however with a contemporary twist: UV rejecting components.
You should purchase powdered additives like Insuladd to combine into any house paint and, supposedly, give it the flexibility to mirror UV whereas additionally insulating your residence. You can even purchase preformulated heat-rejecting paint like Rainguard Cool Coat that makes no claims as to insulating qualities, simply warmth rejection. The concept is similar: Bounce again the solar’s UV rays higher than white paint alone to forestall the underlying partitions from heating up and transferring that warmth to the inside of your residence.
To evaluate all three, we painted equivalent siding boards with the coatings and positioned them in full afternoon solar on a 75-degree F (24 C) day — not precisely a scorcher, however usually one of the best we will muster alongside San Francisco Bay.
The outcomes have been each encouraging and disappointing: Regular white paint allowed a board to take a seat within the solar but present no measurable warmth absorption, studying nearly the identical because the ambient temperature. But, in accordance with our laser temperature gun, the UV blocking paints did not actually maintain a board any cooler. Similar outcomes have been recorded on the backs of the boards the place warmth switch was measured.
To present how outstanding white paint is, a brown stucco wall underneath the identical situations registered practically 25 levels F hotter than the identical wall painted white, albeit with certainly one of our white UV paints. Bottom line: It looks as if any white paint is superb at protecting your house cool.
We solely examined white paints and maybe UV-blocking expertise makes extra of a distinction when used with darker colours that want extra assist rejecting warmth. But if you wish to cool your residence with the simplest, most inexpensive stroke of a brush, paint it white and you could not must sweat any fancy tech.
: Tips to strive earlier than you name a professional.
: Actively retains your ears cool.