If you were Registered and logged in, you could reply and use other advanced thread options
|
Posted by BobK207 on October 15, 2007, 2:48 pm
> Thanks again for all the help, folks!
Rebecca-
Let us know how it turns out when (if) you make an changes and how it
does during the next downpour.
cheers
Bob
|
|
Posted by MNRebecca on October 10, 2007, 10:43 am
Well, I checked for blockages last night. None. I confess I'm a
little bummed. My house isn't that big... 1,800 sq. feet. Is it
logical that even a smaller home can have 'too much roof for the
gutters' in heavy downpours? By the way, Dave, the roof is shingled
with shangle shingles. The part where I'm presumably getting more
water than standard downspouts can handle is an area with a cathedral
ceiling over 2 inside vaults (one over a dining room and one over a
living room whose vault is perpendicular to the adjoining dining room
vault).
RW
|
|
Posted by RicodJour on October 10, 2007, 12:45 pm
> Well, I checked for blockages last night. None. I confess I'm a
> little bummed. My house isn't that big... 1,800 sq. feet. Is it
> logical that even a smaller home can have 'too much roof for the
> gutters' in heavy downpours? By the way, Dave, the roof is shingled
> with shangle shingles. The part where I'm presumably getting more
> water than standard downspouts can handle is an area with a cathedral
> ceiling over 2 inside vaults (one over a dining room and one over a
> living room whose vault is perpendicular to the adjoining dining room
> vault).
If you're sure there's no blockage anywhere in the downspout (or where
it enters the ground, if it drains underground), that simplifies
things. You need a larger downspout and possible a larger gutter as
well. You can have a handyman cut a larger hole where the existing
spout is now and fit a 3x4 downspout to replace the existing 2x3.
It's kind of hard to believe that the original installer would think
that a single 2x3 spout could handle 40' of roof. Typically there are
two 2x3s on a 30' run, so you're close to a 2/3s undersized downspout
arrangement.
Is there any water cascading over the front edge of the gutter
anywhere along its length?
R
|
|
Posted by MNRebecca on October 10, 2007, 2:06 pm
> Is there any water cascading over the front edge of the gutter
> anywhere along its length?
Nope. That happened a while back when, to my shock, the downspout
hole in the gutter clogged just two weeks after being checked (and
despite my use of gutter guards) and the gutters began overflowing in
a downpour (after two years of drought, all we get is downpours!). I
scooted up quick and unclogged it. So, when all is clear, the gutters
can handle the load from a downpour, but the downspout, at the elbow,
can't, and the rain shoots up out of the top of the elbow.
|
|
Posted by Bobk207 on October 10, 2007, 9:24 pm
>
> > Is there any water cascading over the front edge of the gutter
> > anywhere along its length?
>
> Nope. That happened a while back when, to my shock, the downspout
> hole in the gutter clogged just two weeks after being checked (and
> despite my use of gutter guards) and the gutters began overflowing in
> a downpour (after two years of drought, all we get is downpours!). I
> scooted up quick and unclogged it. So, when all is clear, the gutters
> can handle the load from a downpour, but the downspout, at the elbow,
> can't, and the rain shoots up out of the top of the elbow.
The additional info you have provided seems to confirm that the
vertical down spout section coupled with the "horizontal section" (ie
the drain line) cannot handle the flow.
IMO a larger down spout & drain line is indicated. The larger down
spout will be less prone to clogging & and the larger drain line will
give less back pressure to the system.
If you want to get technical, you need the area of the roof that is
drained by this gutter, down spout, drain line combination....armed
with this info AND a estimate of the peak rain fall rates you've been
experiencing (inches per minute or a peak rate of inches per hour
converted to inches per minute)
This will allow you to calc the maximum flow rate through your system
But on the other hand since the gutter doesn't over flow & nothing is
clogged........ you could just seal the elbow joint to prevent the
errant spray and forget about changing anything.
The additional pressure head built up by the rising water in the down
spout (which causes the spray) actually generates a self regulating
system.........the increased pressure increases flow through the drain
line and balances the rainfall run off. Seal the joint & the
immediate issue goes away.
Dry the joint, clean with acetone & seal with aluminum tape. Or a
section of inner tube (or EPDM roofing material) & hole clamps.
It all depends on how you want to handle this.
cheers
Bob
|
Page 4 of 4 << first < 1 2 3
| Similar Threads | Posted | | Like this? (was ELBOWS - seal with sealant or duct tape?) | October 16, 2007, 2:48 pm |
| flex duct or hard duct? | April 30, 2007, 12:12 pm |
| Acoustical Sealant | October 21, 2006, 9:43 am |
| Sealant --- BEST QUALITY | March 28, 2008, 3:02 pm |
| Rebar sealant in Concrete. | June 14, 2007, 3:55 pm |
| Moving a duct or two.. | February 22, 2007, 8:53 am |
| air duct question | June 1, 2007, 2:48 am |
| Re: Sheetrock Tape -- is it always necessary at joints | January 6, 2008, 8:44 pm |
| Re: Sheetrock Tape -- is it always necessary at joints? | January 6, 2008, 9:41 pm |
| Re: Sheetrock Tape -- is it always necessary at joints? | January 7, 2008, 2:59 pm |
|
|
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap