DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Carpentry and Woodworking > Flat roofs???




Reply
 
Thread Tools Search this Thread Display Modes
Old 08-11-2006, 09:51 PM  
starrider
Member
 
Join Date: May 2006
Posts: 37
Default Flat roofs???

Hi Guys!

In this Bay city...most...practically all have a flat roof as this 80 year old house does. Most have the pea gravel on top. Whereas mine has what looks like a polyurathane or silver colour foam (no gravel).

I have been told that it is the newer way of doing roofs. However...today while up on the roof...i noticed that it is continues to develop small cracks.

I have been filling these small cracks with 'roof patch' a black tary stuff in a can ...using a putty knive...

I was told this was NOT the right stuff to use...to fill the cracks?

Would someone explain the pros and cons between the two types of roofing ...pea gravel vs. silver foam like... And since i have this silver roof ...what should i be using to patch these small cracks...what is done when you need to reroof this kind of roof?... Inotherwords do they just spray another layer of foam over the old stuff???

I can only see one drain spot where the roof grades down a little and drains the water out the side into a drain pipe running down the exterior wall...

And there is perhaps a small space between the ceiling...however i have not found any access to it...perhaps just a foot more or less...

Thanks!!! Your advice appreciated...! Starrider



__________________

Last edited by starrider; 08-11-2006 at 09:53 PM.
starrider is offline  
 
Reply With Quote Quick reply to this message
Old 08-11-2006, 11:41 PM  
asbestos
Good with caulk
 
asbestos's Avatar
 
Join Date: Feb 2006
Posts: 244
Liked 2 Times on 2 Posts
Likes Given: 2

Default

I am not an expert but there are "membrane" roofs made out of rubber stuff (EPDM) since these are made of a plastic/rubber material I think the asphalt in the "black goop" will degrade your roof. there are several products for newer style roofs. Is this silver colored foam the foil coating on those sheets of ridged PIC insulation? I would also look for manf.' s websites to see if you recognize what you have



__________________

[FONT="Franklin Gothic Medium"][SIZE="3"][B]Everyone is entitled to their own opinion, but not their own facts[/B][/SIZE][/FONT]

asbestos is offline  
 
Reply With Quote Quick reply to this message
Old 08-11-2006, 11:54 PM  
starrider
Member
 
Join Date: May 2006
Posts: 37
Default

Hi Asbestos!

It looks like silver paint and perhaps describing it wrong when i say foam...as it is hardened. It looks like it was in some semi liquid form when applied...and before i started to use the tar stuff...it had already began to show small cracks from just the sun and environment i assume...

Thanks for your input...we'll look up those your suggestions...

Starrider

__________________
starrider is offline  
 
Reply With Quote Quick reply to this message
Old 08-12-2006, 01:35 AM  
starrider
Member
 
Join Date: May 2006
Posts: 37
Default

Checked out the Epdm products...rubber membrane...and this doesn't look like what i have...although from what i read...seems looking into it as an alternative might be a good idea...

Starrider

__________________
starrider is offline  
 
Reply With Quote Quick reply to this message
Old 08-12-2006, 07:06 AM  
inspectorD
Housebroken
HRT_MODERATOR.png
 
inspectorD's Avatar
 
Join Date: Dec 2005
Location: Litchfield, CT
Posts: 4,097
Liked 125 Times on 105 Posts
Likes Given: 321

Default Flat.....

I hope there is at least a little pitch to your roof.

Stuff you have is most likely a spray foam insulation covered with silver oxide paint.The same stuff used on metal roofs. I have also seen the silver on asphalt shingles, this stuff lasts a long time.

If you have cracks I would change the roof, water gets into this type and takes forever to get out.Besides that you can never really tell the condition of it with tiny cracks all over.

The new style EPDM rubber roofs last much longer and are easier to repair when you do get a hole. No tar should be used on any of these roofs....eats em up.

__________________

Just My
Made in the

inspectorD is offline  
 
Reply With Quote Quick reply to this message
Old 08-12-2006, 11:25 AM  
starrider
Member
 
Join Date: May 2006
Posts: 37
Default

Thanks InspectorD!!!..."silver oxide on foam"...ok good to know!

So when i get a new roof...what about the structure underneath...when my neighbor was up on it...i noticed he kind of bounced his weight on it to see how rigid the roof was...and was able to bounce a little...

Inotherwords...if the structure is ok...can the EPDM just be place over the old foam roof?

Thanks again...Starrider

__________________
starrider is offline  
 
Reply With Quote Quick reply to this message
Old 08-13-2006, 11:41 AM  
manhattan42
Member
 
Join Date: Mar 2006
Posts: 44
Default

EDPM usually cannot be installed over other types of existing roofing materials and codes prevent more than 2 layers of any type of roofing material at all.

Because of the structure's age, the 'bounce' may be caused by insufficiently sized rafters which could prevent the addition of another roofing layer without first stripping the old and may indicate the rafter's themselves need to be reinforced or replaced.

__________________
manhattan42 is offline  
 
Reply With Quote Quick reply to this message
Old 08-13-2006, 11:59 AM  
inspectorD
Housebroken
HRT_MODERATOR.png
 
inspectorD's Avatar
 
Join Date: Dec 2005
Location: Litchfield, CT
Posts: 4,097
Liked 125 Times on 105 Posts
Likes Given: 321

Default Like he said.....

EPDM needs to be installed over some hard fiberboard insulation and usually tapered to run water off.
The old stuff definitely needs to come off and inspect the roof deck for wear and tear.
Where you live dictates the sizing of rafters and such due to weather and snow loads. Your townie can help with that.

Get a couple of opinions and prices then post us and we'll do what we can to help.

__________________

Just My
Made in the

inspectorD is offline  
 
Reply With Quote Quick reply to this message
Old 08-13-2006, 12:08 PM  
starrider
Member
 
Join Date: May 2006
Posts: 37
Default

Manhattan42.....Okay we'll hope that i don't need new rafters...however the house is old and if a reroof job is needed...perhaps it's better to just go ahead and get them re-enforced.

This house is about a mile or two from the pacific oceqn...and i feel like i am on an old boat that needs continual patching...lol.


InspectorD.....fiber board insulation ...Btw... there another way to go beside EPDM?....sounds like the stuff is pretty heavy in itself as a whole?

Yes ...Okay good 'run off' or 'pitch'....Thankyou Guys!!!...Starrider

__________________

Last edited by starrider; 08-13-2006 at 04:17 PM.
starrider is offline  
 
Reply With Quote Quick reply to this message
Old 08-13-2006, 06:59 PM  
inspectorD
Housebroken
HRT_MODERATOR.png
 
inspectorD's Avatar
 
Join Date: Dec 2005
Location: Litchfield, CT
Posts: 4,097
Liked 125 Times on 105 Posts
Likes Given: 321

Default Well....

Deep subject.....

Actually EPDM roofing is very lightweight compared to a Bitumenous or torch down roof with multiple layers.
The rubber actually floats on the substrate of fiberboard lightweight insulation. This is screwed down with washers and the rubber is connected at the edge flashings.

Check out www.EPDMroofs.org for more info....or better explinations.

This is all I use for flat roofs now...most hassle free.
Best bang for the buck.



__________________

Just My
Made in the

inspectorD is offline  
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options

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


Similar Threads
Thread Thread Starter DIY Home Repair Forum Replies Last Post
Looking at buying a flat roof house mikeb33 Roofing and Siding 9 05-13-2009 10:37 AM
Flat roof on block of flats - rebuild advice Martinr Roofing and Siding 3 01-16-2009 10:26 AM
Flat Roof SPISurfer Roofing and Siding 5 11-20-2008 11:12 AM
Flat Roof geordieT Roofing and Siding 1 04-14-2008 10:02 AM
Flat roof leaking - repair? replace? rlarkin70 Roofing and Siding 4 06-07-2007 06:53 PM

Newest Threads

LATEST SPONSOR DEALS