Roofing Proposals Comparison

Feature	Alegre (Bitumen)	Alegre (TPO)	MGM (APP Torch Down)	Northway (Bitumen or TPO)
Price	$15,038.06	$38,947.50	$60,507.11	$63,814.40
Scope of Work	Tear off 2 roofs, slope system, crickets, 2-ply hot asphalt, fiberglass ply and base sheet, modified torch down, plastic cement, granules	Tear off 2 roofs, slope system, crickets, Everguard 1121 or Olybond adhesive, GAF 60 MIL TPO, Z-Bar flashing, heat weld method	Tear off, tapered roof system, replace skylights, proper drainage, clean-up, top finish with gravel	Tear off existing gravel roof, pocket roof plywood, double fiberglass base sheet, hot tar mopping, torch-on granulated modified bitumen cap sheet
Odor and Off-Gassing	Strong odor and potential off-gassing	Less odor, environmentally friendly	Odor and potential off-gassing, but better than traditional bitumen	Strong odor and potential off-gassing
Durability and Maintenance	Regular maintenance needed, shorter lifespan	Longer lifespan, less maintenance	Moderate lifespan, requires maintenance	Similar to traditional bitumen, regular maintenance
Environmental Impact	Higher environmental impact	Lower environmental impact	Moderate environmental impact	Moderate environmental impact
Thermal Properties	Retains heat, higher cooling costs	Reflective, energy-efficient	Moderate heat retention	Retains heat, higher cooling costs
Installation Risks	Fire risk from hot asphalt and tar, requires skilled labor	Lower installation risks	Fire risk from torch application	Fire risk from hot tar and torch application
Aesthetic Appeal	Utilitarian appearance	More aesthetic appeal, reflective surface	Moderate aesthetic appeal	Choice of tan or white granulated cap sheet
Warranty	12-year warranty with yearly inspection	12-year warranty with yearly inspection	10-year warranty	10-year warranty
Permit and Fees	Included	Included	Included	Included

Summary:

Alegre (Bitumen): Lowest cost, but has significant odor, off-gassing, and environmental impact issues. Requires regular maintenance and has a shorter lifespan.
Alegre (TPO): More expensive, but environmentally friendly, energy-efficient, and longer lifespan with less maintenance.
MGM (APP Torch Down): Moderately priced, offers better performance than traditional bitumen but still has odor and off-gassing issues. Requires maintenance and has a moderate environmental impact.
Northway (Bitumen or TPO): Highest cost, offering both bitumen and TPO options. Similar issues with odor and off-gassing for bitumen, but provides a choice of colors and includes all necessary services.

Each option has its pros and cons, with the TPO options generally offering better environmental benefits and energy efficiency at a higher upfront cost. The bitumen options are more budget-friendly but come with more maintenance and potential health concerns.