Camper van spray foam insulation in Medicine Hat is usually specified by somebody who has already tried to sleep in an uninsulated van here in July. In the sunniest place in the country the summer case for insulating a van is stronger than the winter one.
Insulating for heat rejection
Most advice about van insulation is written about keeping warmth in. The physics is the same in both directions but the priorities are not. A van used mainly in warm weather wants the roof treated first, because that is the surface taking direct sun for most of the day, and it wants that layer to be continuous, because a gap admits radiant heat as readily as it lets warmth escape. Framed that way the decisions come out differently from a build aimed at winter.
Where reflective surfaces help and where they do not
A reflective layer on the outside of a van reduces how much solar energy is absorbed in the first place, and it genuinely helps. A reflective foil on the inside of the panel, behind the insulation, does very little, because reflectivity only works across an air gap facing a radiant source. That distinction gets confused constantly in van builds, and it is worth being clear about before buying materials on the strength of it.
A van used as a base rather than a bed
Increasingly these are working vehicles as much as sleeping ones -- a desk, a fridge, batteries and a place to sit out the middle of the day. All of that adds heat inside the van at the same time the sun is adding it outside. A fridge in particular runs harder in a hot van and puts its own heat back into the space, which is a loop that insulation and ventilation together are what break.
Ventilation is half of the answer
Insulation slows heat arriving; it does not remove heat already inside. A roof vent moving air is what does that, and in this climate the two have to be specified together. A well-insulated van with no ventilation is a better insulated oven. Deciding the vent position before the foam goes on also avoids cutting through the finished layer afterwards.
Camper Van Spray Foam Insulation Medicine Hat: Common Questions
Is insulating worth it if I only use the van in summer? In Medicine Hat particularly. The roof takes direct sun most of the day and an uninsulated van is hotter inside than out by afternoon.
Does reflective foil inside the wall help? Very little. Reflectivity works across an air gap facing a radiant source, so a foil buried behind insulation does almost nothing.
Do I still need a vent? Yes, and it is half the answer. Insulation slows heat arriving; only moving air removes what is already inside.
Work out the depth with the R-value calculator, then get a free Medicine Hat quote. More on Camper Van Spray Foam Insulation Alberta.