I just got an estimate for a new roof on my home for $23,000.00. The roofer did an inspection inside and stated that there was sapping on the wood beams at the highest point on the roof. He stated that this is caused by poor ventilation. I also have a crack that goes the whole length of one of the rafters. My roof is large about 3425 and has high pitches which is why it is so expensive. The price includes proper installation that would provide the proper ventilation that is needed and they would also repair the cracked rafter. I am just sick about this and don't want to be ripped off. They would also remove the sap which he said is not necessary because the new roof would prevent further damage. But they would still remove it.
My question is: Do roofers normally check the inside of the roof as well as the outside or is this a sales pitch? Is it the norm for roofers to install a new roof with regard to ventilation? I could get a cheaper roof, but don't want to put a band-Aid on a roof if it's not properly ventilated Thanks.