Forums | Home Repair | Home Improvement | Painting | Interior Decorating | Remodeling | Landscaping


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Roofing/Siding

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 01-12-2011, 07:29 PM   #1
DIYer
 
Join Date: Aug 2010
Location: Oakland, CA
Posts: 113
Share |
Default

Green roof drainage plane


I'm planning to build a green roof over a 120 sq ft structure and I have sources for all the components except the drainage plane.

I got a quote from a company offering a solution; $35 per square foot! Way too pricey

Gravel would work and is cheap but I'd rather not have that kind of weight on the roof. Wiffle balls would work and they're light but they're not cheap (in the quantity I'd need)



Any ideas?
dwoloz is offline   Reply With Quote
Old 01-12-2011, 09:13 PM   #2
Doing This Way Too Long
 
Join Date: Jun 2008
Location: North Idaho
Posts: 1,069
Default

Green roof drainage plane


The systems are designed together for a reason. Proper drain mat is critical and designed to ensure proper water flow while being able to support the growth medium and vegetation.
I do entire systems for less than $35/sf. Never heard of any type of drain mat for that price.

I'm not in the office but I'll see if I can't get you information on the two mats I've used. It's not cheap but I guarantee you it's not $35/sf.
OldNBroken is online now   Reply With Quote
Old 01-13-2011, 08:07 AM   #3
Member
 
Join Date: Nov 2010
Location: Indianapolis
Posts: 84
Default

Green roof drainage plane


Even though it's only one square, four grand does not sound unreasonable for a membrane roof and slip sheet that someone is going to grow plants on top of... If I have to provide any kind of warranty, that is.

The system we use is prevegetated and uses lightweight grow medium in a 1x2 tray system. Even with the lightweight aggregate the structure still has to support a lot of extra dead load when it's wet/snowy (140lbs/sf IIRC). Never heard of the wiffle ball method.

We use EPDM as our drainage plane, but my honest advice is call a pro. As noted above some contractors may be able to install the whole system for that price.
jmiller is offline   Reply With Quote
Old 01-13-2011, 10:15 PM   #4
DIYer
 
Join Date: Aug 2010
Location: Oakland, CA
Posts: 113
Default

Green roof drainage plane


I have the soil media, I have the plants, I have the filter fabric, I have the waterproof liner (EPDM); all of these were cheap ($200) I just need a drainage plane

140psf is crazy heavy. Fully saturated a 4" soil depth of sedums on a lightweight drainage plane (commercial) is around 25psf
dwoloz is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Need opinion on this roof profenx Roofing/Siding 14 10-12-2010 12:56 AM
Strange Winter Roof Leak Dragon Roofing/Siding 16 10-09-2009 06:06 PM
Tile+Asphalt Roll Roof leaking - Opinion on what to do brookbphx Roofing/Siding 5 01-06-2009 06:51 AM
Addition and Roof Replacement lebeld Roofing/Siding 4 01-04-2009 06:11 PM
Please help with the design of this roof jaymay75 Building & Construction 1 05-06-2008 09:44 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.