Re: Roof replacement question
[Re: HayDay]
#8423029
06/20/25 12:36 PM
06/20/25 12:36 PM
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Joined: Dec 2009
The Hill Country of Texas
Leftlane
"HOSS"
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"HOSS"
Joined: Dec 2009
The Hill Country of Texas
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Hayday I can see 2 factors that would likely contribute to a short roof life in that photo in Missouri, the first being the dark color. It is a poor choice much below MN and WI because the darker the color the more heat it absorbs and holds. That is why the adhesive fails early leaving a 30 yr shingle thread bare in 15 years.
As far as those box vents- they work so well (joke) that the only new houses with them now are trailer houses. They are old technology and not up to the task of venting attics with thicker shingles like the one you have now. When they originated, the only thing available were 3 tab shingles weighing 200 pounds per sq. The shingle on your roof weigh at least 300 pounds per 100 sf so at least 50% more.
If you have enough soffit venting (and it is not clogged by the crew who put ceiling insulation in your attic) continuous ridge venting is the solution and it's not even expensive. For a few hundred bucks you'd get twice the life out of a roof that is going to cost you what- $20 - 25K? Thats a good investment.
What"s good for me may not be good for the weak minded. Captain Gus McCrae- Texas Rangers
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Re: Roof replacement question
[Re: HayDay]
#8423137
06/20/25 04:19 PM
06/20/25 04:19 PM
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Joined: Mar 2018
Missouri
HayDay
OP
trapper
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OP
trapper
Joined: Mar 2018
Missouri
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What mods need to be made to the existing roof to get to ridge venting? May only need to be done to the main roof line which runs coast to coast (east to west). There are 4 or 5 dormer/gables that are small and may not need the venting. The main peak roof line is well above them anyway.
I think they went dark to contrast with white siding (we bought it......didn't build it). So will need to come up with acceptable lighter color. I put white shingles on chicken house for that very reason, but it has red barn siding.
Additional reason for more ventilation is house was built on a slab. HVAC ducts run in attic. AC in hot attic. Heat in cold attic. Cannot say enough bad things about that. Ought to be a hanging offense.
Cost estimate was $25k plus.
Easy to vote your way into socialism, but impossible to vote your way out of it.
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Re: Roof replacement question
[Re: HayDay]
#8423189
06/20/25 06:22 PM
06/20/25 06:22 PM
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Joined: Dec 2009
The Hill Country of Texas
Leftlane
"HOSS"
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"HOSS"
Joined: Dec 2009
The Hill Country of Texas
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JMO it is difficult to over-ventilate an attic space. Say there are 3 dormers that have 8 ft of ridge cap available for venting and a roofer charges you $10 / foot to put it in. You are gambling on the life of a $25K roof to save maybe S250? If proper venting makes your roof last 28 years instead of the 18 you got this go round, you'd be looking at savings og $496 every single year.
As far as modifying you existing set up for continuous ridge venting, the roofers do it on the day they replace the roof. They simply trim the sheathing at the top of each slope a couple inches and slap the new venting over the top and cover it with shingles. They will patch over the old holes for the little turtle vents you have now. It's a fairly quick and simple upgrade.
What"s good for me may not be good for the weak minded. Captain Gus McCrae- Texas Rangers
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Re: Roof replacement question
[Re: HayDay]
#8423195
06/20/25 06:27 PM
06/20/25 06:27 PM
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Joined: Dec 2006
NWWA/AZ
Vinke
trapper
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trapper
Joined: Dec 2006
NWWA/AZ
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If you install ridge vent,,,,,, you need to close gable vents,,,,, just my humble opinion…….
Ant Man/ Marty 2028 just put your ear to the ground , and follow along
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Re: Roof replacement question
[Re: HayDay]
#8423203
06/20/25 06:39 PM
06/20/25 06:39 PM
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Joined: Feb 2020
Indiana
Providence Farm
trapper
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trapper
Joined: Feb 2020
Indiana
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Does standing seam eliminate the exposed screws and need to tighten? I've seen at least two older metal roofs, the rubber grommets on the nails and screws are gone. Roof leaking. One like a sieve.
As for roof warranty, how would one even collect? We did not built house, have no clue who installed roof or what brand is even up there. Insurance Co didn't even mention roof warranty. If it had a 30 year warranty, it didn't seem like it would matter........or fall back on whoever made the shingles. It's considered damaged and they are paying to replace. Yes standing seam eliminates exposed fasteners. from my understanding. It has a clip that goes over the Ridge of the steel and under the next piece going down. Looked to cost 3x as much as pole barn steel when I looked. Seems like it was also heavier gage also.
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Re: Roof replacement question
[Re: Vinke]
#8423210
06/20/25 06:50 PM
06/20/25 06:50 PM
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Joined: Dec 2009
The Hill Country of Texas
Leftlane
"HOSS"
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"HOSS"
Joined: Dec 2009
The Hill Country of Texas
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If you install ridge vent,,,,,, you need to close gable vents,,,,, just my humble opinion……. Good observation Vinke- if I accomplished a passive air flow, I'd want the intake down low on the soffit not up at the top.
What"s good for me may not be good for the weak minded. Captain Gus McCrae- Texas Rangers
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Re: Roof replacement question
[Re: HayDay]
#8423428
06/21/25 10:07 AM
06/21/25 10:07 AM
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Joined: Mar 2018
Missouri
HayDay
OP
trapper
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OP
trapper
Joined: Mar 2018
Missouri
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Spent some time looking at the plastic panel ridge vent products. In theory can see how they work. Many utubes that are almost falling down funny in how bad they are. Example? Watching guys explain why you need a 3 inch nail to hold it down, then driving it into a 1/2" roof deck.........but not into a rafter under the deck. They would also do better to show attic temps before and after install. Perhaps some flagging tape showing air flow thru the vent, once installed.
But aside from all that, we get heavy, wind driven rain.........and when snow is heavy, lots of wind driven powder. Spindrift. Would be concerned both rain and snow could get driven into the ridge, but maybe no worse than mushroom caps allow now?
Easy to vote your way into socialism, but impossible to vote your way out of it.
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Re: Roof replacement question
[Re: HayDay]
#8423437
06/21/25 10:31 AM
06/21/25 10:31 AM
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Joined: Dec 2009
The Hill Country of Texas
Leftlane
"HOSS"
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"HOSS"
Joined: Dec 2009
The Hill Country of Texas
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On a low slope roof wind driven rain can be a problem but on steeper slopes it never happens. It's fairly simple physics unless you have hurricane force winds, water cannot work it's way that far up hill.
A friend of mine working down in the coastal bend area figured out how to keep the ridge vent sections down through a hurricane. He uses at least 4 if not 6 deck screws per each 4 ft section and aims for rafters. Problem solved- hurricane Harvey at Aransas Pass was a wind event (not water / tidal surge) and the residential roofs he installed lost the ridge cap shingles but not the protective vents themselves.
I've not put a thermometer in an attic to show before and after results but it is a great idea. I have however driven past houses who's first roof only lasted 15 years for the last 25 years. Wanna guess what changes they made?
What"s good for me may not be good for the weak minded. Captain Gus McCrae- Texas Rangers
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Re: Roof replacement question
[Re: HayDay]
#8477644
Yesterday at 02:40 PM
Yesterday at 02:40 PM
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Joined: Mar 2018
Missouri
HayDay
OP
trapper
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OP
trapper
Joined: Mar 2018
Missouri
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Epilogue............. Roofing guys just pulled out yesterday.......house now sporting a new roof using Malarkey roof system using Vista AR shingles.......and nearly 100 linear feet of Certainteed ridge vent. Contractor thought old original shingles were a mid level Tamko shingle.........and had a total of 12 mushroom caps, each with about 8" round tube for vent, plus 3 open gable vents. Total roof vent area required for a 150:1 ratio was around 1,150 square inches. It had around 300 square inches. 2 or 3 areas above dormers may have been blocked off with no roof vents at all....meaning 2 or 3 really hot pockets. At one point I put my smoker temp monitor up in attic and on days when it was over 90F outside, it was 30 degrees plus hotter up in the attic. The internet seems to think 130F plus attic temp is when shingles start to cook off. This roof had probably exceeded that many times each summer. Had a 1.5 inch rain in 1 hour the other day and when it was over, noticed a big pile of roof grit at downspout. Gutters full of it.....formed little sand bars. New roof now has around 2,400 square inches of ridge type roof vent area. Mushroom caps gone......gable vents blocked off.....dormer areas all now have ridge vent. All soffit areas are vented, so should have at least that much low vent areas. There are the foam chutes over the plates to allow roof vents to draw soffit make up air, but still have concerns if those are working right, Some look to me like they remain blocked off. Can't get to any of them to tell how much air is flowing thru them. As noted, in before, attic temps running 30F plus hotter in attic than outside. As of now, it's 86 outside and same smoker temp probe is running 104F in attic, so around 18F difference......which makes me think soffit vents not working to fullest extent. But even so, bedroom over the garage that used to be hot now same temp as rest of house. AC not running as much. Don't think any of the 8 to 10 guys working on roof habla ingles, so hard to communicate with those guys, but foreman was local guy and he kept an eye on things. Those guys were workers. Showed up before dawn and left AFTER the sun went down.........took 30 min at noon to eat. Otherwise no group breaks during 12 hour day. Understand why people want to hire them. ![[Linked Image]](https://trapperman.com/forum/attachments/usergals/2025/09/full-51773-270156-img_2042.jpg)
Easy to vote your way into socialism, but impossible to vote your way out of it.
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Re: Roof replacement question
[Re: Animals Only]
#8478095
5 hours ago
5 hours ago
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Joined: Dec 2006
MN, Land of 10,000 Lakes
Trapper7
trapper
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trapper
Joined: Dec 2006
MN, Land of 10,000 Lakes
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I did a fifty year architectural shingle. It will last the rest of my life. When my insurance co. saw the shingles they raised my rate because of the cost of the shingles should they need to replace them. I told them the high quality shingles should reduce the potential for a claim and they should charge me less, they didn’t agree. Insurance companies will also charge more for a metal roof for that same reason. The cost to replace a metal roof is higher than a standard shingled roof. I always thought that was strange too, as the more expensive roof will stand up to the elements better than a standard shingled roof. Your chance of a claim with an upgraded roof is lower.
My wife says my housekeeping style is best described as, "There appears to have been a struggle."
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