Answer:

1. Copper, Zinc, Nickel, Chrome, Clay, Iron=Plumbing Fixtures  
2. Stone, Brick, Iron=Fireplace, Stove, Furnace  
3. Limestone, Clay, Shale, Gypsum, Aggregate=Foundation, Driveway  
4. Trona, Silica, Feldspar=Windows (Glass)  
5. Copper, Aluminum=Wiring  
6. Coal Power Plant=Electricity  
7. Copper, Zinc, Iron=Door Fixtures  
8. Clay, Iron=Sewer Pipes  
9. Clay, Stone, Aluminum=Exterior Walls  
10. Gypsum=Interior Walls  
11. Titanium, Mineral Fillers=Paint  
12. Silicates, Slate=Roof  
13. Iron, Zinc, Bauxite=Drain, Gutters  
14. Iron, Zinc=Nails, Screws  
15. Silica, Feldspar, Vermiculite=Insulation  
16. Phosphate=Fertilizer For The Lawn  
17. Lead=Solder copper pipes and electical wiring  
18. Tin=Solder copper pipes and electical wiring  

Explanation: