Why seal the edges of insulation board with aluminium tape?

[Amari]

Numerous posts recommend sealing the cut edges of foil-covered insulation board with aluminium tape. Why is this? I never have and have not identified any problem.

 

[Ian123]

Bees can chew it if it’s exposed, internal material is also pretty soft so it binds it together.

 

[user 20297]

Numerous posts recommend sealing the cut edges of foil-covered insulation board with aluminium tape. Why is this? I never have and have not identified any problem.

It's a good idea if it's a piece which you regularly remove and replace as it slows down the fraying and discoloration which can occur. An example would be pieces that are used as dummy-boards; but in that case you would be sealing the edges in any case for the reason described above.

 

[Erichalfbee]

Numerous posts recommend sealing the cut edges of foil-covered insulation board with aluminium tape. Why is this? I never have and have not identified any problem.

If the edges don’t have bee access I don’t seal them either

 

[pargyle]

For what little extra it costs it just stops the edges fraying and it stops the bees or any other critters from burrowing into the foam core...

 

[Buzzlodge]

Bees will eat duct tape and get rid of it possibly making a mess. But they leave aluminium tape alone.
Aluminium tape is useful to make large insulated dummy boards out of kingspan.

 

[pargyle]

Bees will eat duct tape and get rid of it possibly making a mess. But they leave aluminium tape alone.
Aluminium tape is useful to make large insulated dummy boards out of kingspan.

Indeed they do chew duct tape but what is worse is that they then get stuck in the adhesive covered reinforcement strands and die ....

 

[pargyle]

A proper job ....