The home has an existing 16 year old tile roof with closed valleys. One roofer recommended making those valleys open. The other one said that it is not necessary as there are no trees over the roof and may damage the membrane in order to do the work.
Roof is in good shape. Wondering if making changes will make the roof better or not worth the risk?
In detail they said d) cut back all tile off inside V of existing valley metal (e) install Portland cement and pack on underside of cut valley tile to make open valley with closed off underside and (f) paint any or all tile areas as needed, seal all tie ins and transitions.
Would you recommend “opening” the valleys of this tile roof?