Getting excess water drip and steam backing up into rafters. Coming from heat pipe out of roof only after new roof, why? the company came and shortened the stack as it was pressed against the top of the boot on the roof. Thought that was it. Checked it a few days later and it was full of dampness from steam again. We’ve had no rain since I last blew a fan and dried it. It was cold last night and the unit came on. the other trane unit has no vapors like this and is perfect. but the hole cut out is smaller. not sure if excess gas burn-off or what. I don't smell any out of the pipe or inside. Needs a bigger vent out the top? they cut this big square hole but left the other alone and I have issues with this one only.
roof steam backing up into attic from gas heater
- Thread starter knitefall
- Start date
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Getting excess water drip and steam backing up into rafters. Coming from heat pipe out of roof only after new roof, why? the company came and shortened the stack as it was pressed against the top of the boot on the roof. Thought that was it. Checked it a few days later and it was full of dampness from steam again. We’ve had no rain since I last blew a fan and dried it. It was cold last night and the unit came on. the other trane unit has no vapors like this and is perfect. but the hole cut out is smaller. not sure if excess gas burn-off or what. I don't smell any out of the pipe or inside. Needs a bigger vent out the top? they cut this big square hole but left the other alone and I have issues with this one only.
I had a new roof installed after Ida. After about 6 months one of the bedrooms started showing water buildup on the ceiling and within a week or so the ceiling caved in. Come to find out the roofing company did not cut any ridge vent. My air conditioning vents were getting soaked sweating and dripping onto the insulation and dry rock. The roofers literally just layed shingle down to make it appear as if they cut ridge vent but they didn’t.
I learned more about roofs after this incident than I ever wanted to know. I would check everything you can thoroughly or higher, a reputable roofing company to come and give you a second opinion.
I learned more about roofs after this incident than I ever wanted to know. I would check everything you can thoroughly or higher, a reputable roofing company to come and give you a second opinion.
For entertainment purposes only...
"excess water drip" -as if any water drip is acceptable
"steam backing up into rafters" -this is the very first time those words have EVER been strung together
"heat pipe out of roof" -those nagging heat pipes
"shortened the stack" -did it get lengthened in the 60+ years it's been up there?
"trane unit has no vapors" -no words for this
"excess gas burn off" -aka explosion
"don't smell any out of the pipe" -please, step away from the pipe
"excess water drip" -as if any water drip is acceptable
"steam backing up into rafters" -this is the very first time those words have EVER been strung together
"heat pipe out of roof" -those nagging heat pipes
"shortened the stack" -did it get lengthened in the 60+ years it's been up there?
"trane unit has no vapors" -no words for this
"excess gas burn off" -aka explosion
"don't smell any out of the pipe" -please, step away from the pipe
It doesn't sound like the attic is venting. You need to check the vents under the soffits and the vents at the gables. Is the exhaust vent for the heater clogged or stopped up? Is the evacuation fan working properly? When they go out, they might sound like they are running, but not actually be doing anything, just making noise. It may also be that the exhaust pipe is leaking.
If we are talking about your furnace in your central HVAC, when you click the heater on, you should hear a small fan running for about 30 seconds. That's the evacuation fan. The next steps usually happen in about 10-20 seconds... the heater will call for ignition and the igniter will glow (if it's electric.) The heater will call for gas. Gas will ignite. The heater will check for complete flame. The main blower will kick on.
If we are talking about your furnace in your central HVAC, when you click the heater on, you should hear a small fan running for about 30 seconds. That's the evacuation fan. The next steps usually happen in about 10-20 seconds... the heater will call for ignition and the igniter will glow (if it's electric.) The heater will call for gas. Gas will ignite. The heater will check for complete flame. The main blower will kick on.
Yes it functions just like that. It goes through the entire process and heats perfectly
last year I replaced the circuit board. All has been well until after the new roof. The roofers took off 2 inches that go into the vent on the top of the roof, like there wasn't enough room for the venting to happen. It slowed it down but still collecting water. It's wet inside the single wall pipe. It blows on the inside of the roof vent, collects water and drips down. I have a twin unit and it does not do this. There is a turbine next rafter over. Strange issue
So, the exhaust vent doesn't go all the way past the roof line? Is that what I'm understanding? Also, is there a cap preventing rain from falling into the exhaust?
the pipe itself is around 6 inches past the roof line. The vent over it is the same as what's on the other unit in the back of the house. and it's fine. it is this style they put https://external-content.duckduckgo...12cc622479c1ded205223f8e82428bc99b&ipo=images
falshooter
Well-Known Member
You need to call back the roofer.
This is not code.
Not fine. Those roof jacks are for venting kitchen and bath fans, not gas fired appliances. Don't rely on your roofer to get HVAC systems vented properly, they'll get it wrong and it still looks like a brand new roof. Best course of action is to either hire a licensed HVAC contractor or do your research to vent (the "V" in HVAC) your gas fired appliances safely, up to code, etc. Probably don't have makeup air at either furnace location and that's another safety concern. You're getting a lot of bad and /or partial information from well intentioned folks in here. Fire, gas and carbon monoxide aren't casual concerns -hire a pro. Good luck.
That’s what I figured might be the problem. That is not the proper vent for gas appliances as others have mentioned below. I’ve been doing roofing for close to 20 years and unfortunately see this all to often. Those are much cheaper than the proper vent. Most likely why it was used versus the proper one. A lot of people say get a plumber or HVAC contractor to change that. Good luck getting them on the roof and if they do good luck getting it properly sealed. However, an experienced, quality roofer will install the proper vents in the proper locations.
Thank you all for the replies. Yes, soffits are not blocked. I ended up changing the top of the roof jack to a different style. There was no way I should've been getting that back-feed.
Next project: finding a 60' JLG that does not break the bank. Anyone in baton rouge want to make an extra buck?
Next project: finding a 60' JLG that does not break the bank. Anyone in baton rouge want to make an extra buck?
