Use black and cover it with gravel.

You may need an extra layer on top of the EPDM to protect it if the rocks are sharp.

Thanks for quick response Brickeyee. However, this is a residence and there is no border around roof to contain gravel. Also, I or others may occasionally walk on the roof to clean gutters and service roof above it, paint house, etc.

Add that border as you put down the EPDM.

It has to be glued down, fastened down, or ballasted down.

With the correct layer on top of the EPDM (often non-woven rayon type material) before the gravel is pout down you can still walk on it for maintenance purposes.

I just got what seems like an unusual bid from a local contractor with a good reputation. Although EPDM and PVC are better, this is tempting because the installer is good and the price is less than half that of the other materials. What do you think?

1. Leave the tin roof in place
2. Attach 1/2 inch rigid insulation over the old tin roof
3. Attach 3/8 or 1/2 inch of some type of sheathing board over the insulation
4. Adhere the torch down to that surface. (GAF smooth surface)
5. Paint the surface with aluminum paint, which he says needs to be painted only every 7-10 years.

roof has very small slope (1%, or 1/8 inch per foot)

Is this installation OK?