Modulare house build in 1999, had metal roof over subroof made of
stucco and white styrofoam, can I replace the metal roof with
shingles, will it work if I put 1/4" plywood with screws and great
stuff to hold it to the subroof and lay tar paper and then shigles.
Thank you for your help.

Shingles are normally only used on roofs with a minimum slope, because
otherwise the water will leak back between the shingles. New trailers
and motorhomes, which have flat roofs, usually use some sort of rubber
membrane. Are you looking for some kind of cheaper alternative?

Yes the house does have a slope, here the house stuctural element:
1. Exterior Wall 1 CB STUCCO 
2. Year Built 1999 
3. Air Condition Desc. HTG & AC 
4. Heat Type FORCED AIR DUCT 
5. Heat Fuel ELECTRIC 
6. Bed Rooms 3 
7. Full Baths 2 
8. Half Baths  
9. Exterior Wall 2 N/A 
10. Roof Structure GABLE/HIP 
11. Roof Cover MODULAR MTL. 
12. Interior Wall 1 DRYWALL 
13. Interior Wall 2 N/A 
14. Floor Type 1 CARPETING 
15. Floor Type 2 CORK/VINYL TILE 
16. Stories 1 
 Subarea and Sq. Footage for Building 1 
No. Code    Description Sq. Footage 
1. BAS BASE AREA 1488 
2. FGR FINISHED GARAGE 336 
3. FOP FINISHED OPEN PORCH 95 
  Total Square Footage : 1919 
  Total Area Under Air : 1488 
Please let me know if you need further information, like pictures etc..
Thank you

I was just wondering why you don't like the metal roof?

Last year was the second time the hurricane takes it away, and my
insurance company wouldn't beleive that it did.
I'm tired of replacing it every year, and it's not fun mounting it together.
J

I think a hurricane would take away your shingles, as well. Your plan
sounds good to me. You might want to talk to somebody at Home Depot,
or wherever you buy your supplies, just to be sure.

I see it only one way, use an elastomer membrane. Shingles are not
going to work. Check out membranes on Google and you'll find lots of
brands and options. Do your homework and get to know the products!
Most membranes (the good ones) are installed using special
blowtorches, tools and techniques. You should have this done by a pro.
The answer to your question is in the Yellow Pages under "roofing"

_____Peter

I dont know what the sub roof is made of.  What ever it is, make sure
it is sturdy.  You dont want to do repairs again because it wasnt.  If
you have to, strap it, (put strapping, wooden strips about a 1/4 inch
thick, on top of it, then your plywood, then your shingles.  Make sure
you follwo the manufacturers instructions with the shingles, they
arent all the same.