5 year or 10 year HELOC?

[Mark Plesha]

I need to decide between a 5 yr and 10 yr HELOC. I see the benefit of locking in these lower rates for 10 years, however I'm going to be finishing my basement in the next few years to add another 1000 sqft. So if I do the 5 yr, and finish the basement, plus have another 5 years of loan pay down (15 yr mortgage) I'll have quite a bit more equity. I also see the potential for the rates to not raise dramatically in the next 5 years with the slow growth of the economy. Supposed to be going to underwriting in the morning and need to let the lender know. Any suggestions would be greatly appreciated.