Recent Topics
Update password ?
by meadows
06/17/18 11:59 PM
Delayed Sleep Phase Disorder
by Reddy45
06/17/18 11:56 PM
Nissan DLR put 0w20 in car that specs 5w30. worry?
by CrAlt
06/17/18 10:40 PM
revive Nicd battery
by Donald
06/17/18 10:27 PM
Need help finding an apartment for friend
by RazorsEdge
06/17/18 10:07 PM
ceratec with redline 5w30?
by 08z06
06/17/18 09:53 PM
does your COMCAST modem have weak wifi??
by edwardh1
06/17/18 09:50 PM
I hate stuck thermostats
by jakewells
06/17/18 09:49 PM
Mag1 75w90
by SavagePatch
06/17/18 09:32 PM
Old batteries at HD
by bbhero
06/17/18 09:27 PM
Buying a CPO Toyota - still get inspected?
by Parlay_Slow
06/17/18 09:08 PM
Water Pump Paper Gasket With RTV? Longevity?
by nobb
06/17/18 08:22 PM
Who makes Briggs & Stratton oil?
by spk2000
06/17/18 08:13 PM
Shure stylus replacement
by aquariuscsm
06/17/18 07:54 PM
Any 'crazy UCL overdose' fans out there?
by addyguy
06/17/18 07:11 PM
Source for Castrol Edge Supercar 5w50 oil?
by Rainier42
06/17/18 06:50 PM
Cherry vs orange hand cleaner
by JHZR2
06/17/18 06:27 PM
Why buy low mileage tires?
by HowAboutThis
06/17/18 05:49 PM
Mercury 35-8M0065104 cut open w/ oil change pics
by dlundblad
06/17/18 05:37 PM
2019 Honda’s miniMOTOs (125cc)
by DuckRyder
06/17/18 05:18 PM
Newest Members
mostdecent, T1TN, Piper58, dunlop0078, Truth_Syrup
65258 Registered Users
Who's Online
31 registered (bubbatime, AVB, bbhero, bdcardinal, Bryanccfshr, askani79705, 5 invisible), 973 Guests and 36 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
65258 Members
67 Forums
285502 Topics
4764666 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Page 1 of 2 1 2 >
Topic Options
#4585856 - 11/26/17 04:40 PM What is causing my roof to droop?
gregk24 Offline


Registered: 04/13/13
Posts: 5600
Loc: FL, USA
As you can see from the picture, the roof over my carport is sagging. Many of the houses in my neighborhood (most built in the 50's) are the same way. What causes this and do you think its a problem or just cosmetic? I was up on the roof putting up Christmas lights a week ago and it did NOT feel soft or bouncy walking on it.

_________________________
2012 Honda Accord EX-L K24z3
53,xxx miles
PPPP 0w20 / Fram Ultra

2014 VW Jetta SE 1.8T ea888
37,xxx miles
Castrol Edge 0w40 / OEM filter

Top
#4585870 - 11/26/17 04:48 PM Re: What is causing my roof to droop? [Re: gregk24]
JC1 Offline


Registered: 11/29/08
Posts: 2999
Loc: Oshawa, Ontario Canada
Are you able to get into that attic section of the roof to see the structure? Could.be joists shifting or plywood getting soft. Or is the sheathing thsoe strips of wood that they used to use a long time ago?
_________________________
2015 Grand Caravan SXT Plus 5w-20 PPPP/Wix Filter
1997 Honda Civic CX 5w-30 PPPP/Mahle Filter

Top
#4585874 - 11/26/17 04:51 PM Re: What is causing my roof to droop? [Re: JC1]
JMJNet Offline


Registered: 09/06/07
Posts: 928
Loc: TX, USA
Originally Posted By: JC1
Are you able to get into that attic section of the roof to see the structure? Could.be joists shifting or plywood getting soft. Or is the sheathing thsoe strips of wood that they used to use a long time ago?


I agree, no way of knowing unless somebody is looking what is going on underneath.
May be the underlayment board broke or the supporting wood broke.

They are not designed to last for 60 years.


Edited by JMJNet (11/26/17 04:51 PM)
_________________________
  • 2017 Toyota Sienna
  • 1995 GMC Suburban 6.5L Turbo Diesel



Top
#4585899 - 11/26/17 05:10 PM Re: What is causing my roof to droop? [Re: gregk24]
doitmyself Offline


Registered: 06/03/02
Posts: 6213
Loc: MI
Built in the 50's, I'm going to guess that it is conventional rafter design (vs. trusses). That it is happening only over the car port is your first good clue. I would look at the front and back fascia areas to see if they look pushed out a tiny bit, allowing the ridge to sag. My guess is that they continued the same roof design over the car port that they used on the rest of the house. But, the car port has almost nothing (no front/side/center bearing walls) supporting and holding the rafter system together as the "locked together" unit it is designed to be. Or, maybe that HUGE joist span over the car port is just too long. Look for sagging joists too, which would allow the ridge to sag.

An inspection by a trustworthy builder would reveal the root cause. Since you have no snow load in Florida, and if their are no major structural deficiencies (i.e., cracked ridge board, etc.), it might be just a cosmetic thing. There are sagging roofs that have lasted for centuries.

Top
#4585930 - 11/26/17 05:45 PM Re: What is causing my roof to droop? [Re: gregk24]
Mr Nice Offline


Registered: 09/12/04
Posts: 21173
Loc: Orlando, FL
I don't like all that weight only supported by two steel poles.

A roofer has a better idea and knowledge of why your roof is lower.

Top
#4585938 - 11/26/17 05:52 PM Re: What is causing my roof to droop? [Re: gregk24]
Triple_Se7en Offline


Registered: 12/04/04
Posts: 8745
Loc: 1/2 hr. north of Detroit
Where are your roof vents?
Also, how much insulation is under that roof and is any insulation-roll attached directly to the inside of the roof - between the beams?


Edited by Triple_Se7en (11/26/17 05:53 PM)

Top
#4585951 - 11/26/17 06:05 PM Re: What is causing my roof to droop? [Re: gregk24]
Donald Offline


Registered: 03/21/04
Posts: 20446
Loc: Upstate NY
Best would be to get a structural engineer. They might be $80 per hour and he should be able to examine the roof and write a report in 2-3 hours. But he will need to get into the attic area to look.

Roof trusses are engineered and so they should not be a problem assuming no insect or water damage. I spent my college summers building way too many roof trusses, using massive machines to press the plates into the wood.
_________________________
2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)


Top
#4585985 - 11/26/17 06:39 PM Re: What is causing my roof to droop? [Re: gregk24]
Ducked Offline


Registered: 10/25/12
Posts: 4325
Loc: Taiwan
Gravity

Top
#4585997 - 11/26/17 06:47 PM Re: What is causing my roof to droop? [Re: gregk24]
andyd Offline


Registered: 09/25/04
Posts: 7125
Loc: Marshfield , MA
Not enough of a collar tie on the rafters. Looks easy to fix though. Put a couple of A shores up under the fascia to carry rafters and ceiling joists put a couple A shores at half span of the ceiling Jack up shores an inch above where they were. Install collar ties or a W tying a rafter to to a ceiling joist.
_________________________
'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2

Top
#4586002 - 11/26/17 06:58 PM Re: What is causing my roof to droop? [Re: gregk24]
sleddriver Offline


Registered: 02/06/10
Posts: 4597
Loc: Central Texas
If built in the 50's, then odds are it was stick framed. What's the distance, front-to-back?
_________________________
1998 Volvo V70 T5 226,808 mi. Original Owner.
M1 10W-30 HM
"It's never a mistake to buy tools, defined broadly. They're not a cost, they're an investment." - J.B. Peterson

Top
#4586024 - 11/26/17 07:20 PM Re: What is causing my roof to droop? [Re: gregk24]
madRiver Offline


Registered: 07/11/15
Posts: 3531
Loc: New England
Plenty of homes around here with similar roofs. However built between 1690 to 1850 and it simply adds character.

Top
#4586057 - 11/26/17 07:39 PM Re: What is causing my roof to droop? [Re: Ducked]
KGMtech Offline


Registered: 10/17/14
Posts: 964
Loc: SW Ontario Canada
Originally Posted By: Ducked
Gravity


And entropy. Maybe with some termites adding to the molecular chaos.


Edited by KGMtech (11/26/17 07:43 PM)
_________________________
2017.5 Nissan Rogue SV FWD
2013 Nissan Maxima SV
2009 Ford Flex SEL FWD
1984 Yamaha XJ750RL

Top
#4586059 - 11/26/17 07:40 PM Re: What is causing my roof to droop? [Re: gregk24]
PimTac Offline


Registered: 03/04/17
Posts: 4213
Loc: Soviet State of Washington
As suggested already, you or someone needs to get up into the attic. There are a lot of causes for a sagging roof and since you are in Florida the first thing I thought of was termites. A visual inspection is needed.

Also check your storage room too. Does the door open smoothly? Any signs of settling?
_________________________
2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter


Top
#4586092 - 11/26/17 08:16 PM Re: What is causing my roof to droop? [Re: gregk24]
CKN Offline


Registered: 10/14/14
Posts: 3680
Loc: Utah
You can start with a roofer-then a structural engineer-if needed.




Edited by CKN (11/26/17 08:17 PM)

Top
#4586093 - 11/26/17 08:17 PM Re: What is causing my roof to droop? [Re: gregk24]
BrocLuno Offline


Registered: 09/06/15
Posts: 5506
Loc: Kalifornia Kollective
The steel poles are good for like 10,000 each as long as kept "in column". The sag is not effective collar ties.

Jack up the center +1" in the middle. Install some 2x6 collar ties from rafter to rafter and let it settle. Use modern self tapping screws and some good PL8X on the faces to be joined. Should come out pretty straight smile
_________________________
Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.

Top
Page 1 of 2 1 2 >