Tenant wants DirectTV dish installed on the roof, Should I allow?

[Ed Mayor]

Hello guys, 

My tenants wants to have Directv, but when the contractor went to the property, they said the only way to install it would be on the shingles using a tripod type setting for support. I am concerned about damage to the roof and possible leaks in the future. 

There is another antenna, that belongs to Dish, and is still there on the corner of the roof installed with a clamp. It would be ideal to have them just install it where that dish is, but they say they need to be installed on the roof. 

What should I do about this? Suggestions please?

Thanks