We need to replace our current asphalt shingle roof, and would like to do it prior to the vinyl siding installation.
The siding contractor gave us an estimate of $7100 for:
Full rip off of current two layers of shingles, Tamko Heritage 30 year dimensional shingles, Ice Shield, new flashing and vent pipe flanges, remove existing attic fan and repair opening, install Cobra ridge vent, $55 for each plywood sheet that might need replacing.
We then got an estimate of $5900 from another contractor for:
Full rip-off, GAF Timberline 30 year shingles with Timbertex hip and ridge capping system (dimensional), ice shield, 30 lb roofing felt, replace all flashing and flanges, install four IR 65 passive roof vents, replace existing attic fan with GAF Master Flow attic fan.
Obviously there is a big difference in the cost of the estimates but I need to know if that cost is indicative of a significant difference in the quality of materials as well or are both proposals similar in quality?