Rolls on any standard 16 inch ladder.  Pull with pulley from the bottom or 
the top.
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    Hoisting while you sit at the top  | 
    
     
    Hoisting while you stand at the bottom  | 
  
| Fits on a standard ladder  Hoist shingles horizontally up to roof Simple design you can make Materials: wood and wheels 2 boards 1" x 4" x 12' 4 caster wheels 2 pulley wheels 2 eye bolts rope nails Total $35 Inexpensive Less than cost of hiring helpers Easy to make Light to carry No change to your ladder No motors needed Center of gravity safe  | 
    
 Here are 3 unsafe roofers  
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Wood ramp on ladder
https://www.youtube.com/watch?v=HlHiuBHuHoc
Use Google to measure roof
https://www.youtube.com/watch?v=kQbWoDY-QrU
Mechanized ladder home made
https://www.youtube.com/watch?v=cp63dRKWNR8
Motorized 
shingle lift, hoist, elevator
https://www.youtube.com/watch?v=rj2fV3A4vdo 
                                                                                                     
Contractors 
Fix  Lift                                                                                                      
Roof  Seal  Tiles  
- September 
October 1-15  
October 16-31  
November1-6    
November 7-15  
November 16-30  
December
                                                                                                     
www.youtube.com/watch?v=LNAwSLiFKBY 
www.youtube.com/watch?v=MWw9rxJAqRs 
www.youtube.com/watch?v=fMNXv_SjkhA 
