You know how in the middle of summer it's so much more comfortable in the shade rather than out in the hot sun? It's the same with your cooler, except instead of dripping sweat, a cooler sitting out in the sun drips dollars– lots of them, each month of the summer you keep it in operation!
Site your cooler:
- Inside an existing building
- Under a tree
- On the north-side of a barn
- Or build a shading overhang onto an existing structure.
If none of those are possible, then at least make sure you have a ventilated shading roof on the cooler box.
Flat roofs on a small cooler, may still be structurally sound in wind, rain and snow loads, but they don't protect from sun exposure. Building a standard peaked roof (over the insulated cooler ceiling) will shade the cooler and provide passive ventilation with vents in either end or a fan that will keep air circulating over your cooler and save money on cooling costs.
In a house, heat rises and that's why we put twice as much insulation in the roof as the walls, but in a cooler, we're building a box to keep cold in –and cold just sinks. Keep your cooler roof out of direct sunlight and you can put the same insulation in the roof as you did in the walls and you'll save money both in construction and long-term operating costs.