Eavestrough Thermal Expansion Chart

We've all experienced different temperatures of the seasons throughout the year, and our bodies react differently to each one. Well, eavestrough acts similarly by distorting the aluminum, and it's called thermal expansion. 

Thermal expansion happens when aluminum is exposed to changes in temperature and begins to expand or contract. This conflicts with the hangers that are supporting the eavestrough up.


For example, if a 35' section of eavestrough was installed at 10℃, it will expand by 1/2" at 40℃. That 1/2" is enough to cause damage, such as oil canning, buckling, or in extreme cases, the eavestrough will split.


Some precautions can be taken to eliminate the possibility of these things happening:

  1. Limit the run of the eavestrough, as it's recommended that lengths should not exceed 50'. For sections that are longer than 50', the best suitable solution would be to run shorter lengths, leave a gap in between each section, and fasten an end cap to seal off the end. *See picture.
  2. Because temperature plays the most significant role in thermal expansion, it's best to avoid installing eavestrough in colder temperatures. The best temperature range to install eavestrough would be 15-30℃. 
  3. Make sure to adjust your trough machine regularly to guarantee the eavestrough is formed without any curving or buckling happening. 
  4. Trough run-off stands should be set 10' apart and lined up perfectly with the trough machine for support. This would help prevent any stretching or distorting of the eavestrough.


With these suggestions, you may reduce the chances of damages occurring. This will save you time, and money and it will keep eavestroughs performing like new for years to come!


Please click here to see and download our Eavestrough Expansion Chart.

Eavestrough Expansion Chart