This is a case where stretching of the material due to heat can and does come into play. Technique of pulling or stretching tape (look at power lines SAG more or less during heat of day and cool of evening) or laying it on flat surface can aggravate or ameliorate the stretch.
Thickness of the tape as well as construction design (curved or flat) are also minor factors. Material of the tape (steel, cloth, plastic, etc.) determines amount of stretch per degree of heat change.
What are you measuring? How will IT be affected by heat? Bridges expand and contract as much as several feet depending on initial distance between supports. In Chicago, we have frequent pavement "blowups" during the summer where the highway pavement expands so much, it buckles and breaks.