[Greenbuilding] Green roof drainage question

[Alan Abrams]

my house, I'd remove the door, build up the wall at the bottom of the
opening to the height of the max anticipated snow accumulation,
appropriately flashed, and install a large casement window or a modified
door in the remaining opening.  there now, that cooled me off just thinking
about it...


*Alan Abrams**
Abrams Design Build LLC*
*A sustainable approach to beautiful space*

6411 Orchard Avenue Suite 102
Takoma Park, MD 20912
office  301-270-NET- ZERO (301-270-6380)
fax      301-270-1466
cell     202-437-8583
alan at abramsdesignbuild.com
www.abramsdesignbuild.com



On Sat, Jul 23, 2011 at 11:59 AM, Marilyn <cybercrone at eol.ca> wrote:

> **
>   Hi List:
>
>    Here's the problem, best as I can state it.
>
>    When I had my green roof put on the addition to my home, the roof came
> higher than the place it would have been without due to necessary
> engineering, so the 'ground level' is only about 2 inches below the door
> sill where I go out there.
>
>    For a couple of years in a row now we have had much snow and a giant
> fast thaw in February.
>
>    What seems to be happening, best as I can figure out, is that the sun
> has sort of 'glazed' the surface of the ground due to the sun and cold so
> when the rapid thaw hits, the water cannot get to the normal drainage
> channels, and because the glazing has evened out the roof surface and
> counteracted the roof drainage slope, the water backs up through my door and
> causes mucho damage.
>
>
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