Walk-on Flat Roof

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Old 10-23-2007, 10:35 AM   #1
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Walk-on Flat Roof

OK, I know this is not the best solution for this problem, but it is the way my friend (not customer) wants to go and he wants my help.

He wants the rolled roofing on his porch roof to withstand foot traffic and lawn chairs. Yes, the roof is built to stand the dynamic loading. I don't think there is a coating that is recommended by a manufacturer for this purpose, but is there a product out there that will perform within reason?

Please don't get into 'Why is there rolled roofing' because it is a long story that I don't have any involvement.

Please help me out here!

Mont Vista Company, LLC
Alpine, Apache Junction, Gold Canyon, and Mesa, Arizona
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Old 10-23-2007, 03:32 PM   #2
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Re: Walk-on Flat Roof

I've done a few in copper and leaded copper. Flat-locked, of course. No problems.

Just have him schedule you for a new roof about twice a year.

Frank Slate Roof Repairs, Richmond, Va.
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Old 10-23-2007, 04:09 PM   #3
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Re: Walk-on Flat Roof

I know, I know.

I'm putting together a proposal to remove the existing roofing and apply a SonoGuard membrane system.

Any comments or advice?

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Alpine, Apache Junction, Gold Canyon, and Mesa, Arizona
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Old 10-23-2007, 04:23 PM   #4
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Re: Walk-on Flat Roof

I have built deck on sleepers over membrane with no penetrations, worked out okay. Roll roof I think it would melt through.
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Old 10-23-2007, 04:26 PM   #5
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Re: Walk-on Flat Roof

For little more than rolled roofing, a modified bitumen membrane would be much more durable, granulated or smooth, and is much thicker than rolled roofing. A slightly more costly solution would be PVC or TPO heat weld. This is pretty tough stuff, and is great for reflecting the sun/heat, it is white, but not relevant on an unheated porch. If the structure is really beefy, he may consider lightweight tiles or pavers for surface protection on whatever membrane he chooses.
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Old 10-24-2007, 10:04 PM   #6
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Re: Walk-on Flat Roof

smooth app from bottom to top,then smooth perpendicular to the pitch,then use rubber tread way for seating etc. spaced for drainage between pads-flat soled shoes only
"If it`s worth doing.It`s worth doing right!!!

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Old 10-25-2007, 08:18 AM   #7
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Re: Walk-on Flat Roof

4 ply modified bitumen roof system (20 year rated roof), with walk pads over the entire surface and preferrably concrete pavers ontop of the walk pads.

Do it all the time this way.


Last edited by Grumpy; 01-31-2010 at 03:47 PM.
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