Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions |
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Steve_Cebu
Joined: Dec 17, 2009
Points: 888
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Re: New toy!!!
Reply #20 Nov 10, 2010 11:38 am |
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Steve,
If you have icicles like that, you need to take a serious look at two things, 1. your attic insulation, and 2, your attic ventilation. You're probably having ice-dam formations as well, and that could cause serious problems down the road. They put on a new roof and I got to see exactly what was under the old one. We have no attic at all, no crawl space, nothing. The roof ends at the sheetrock on the other side. We were having some ice dams but supposedly that's been fixed. It's all on one side of teh house the back side with no sun gets almost nothing. They redirected drainage around the door and we shall see since every year the ice has ripped off the water drain. They used a different method this time. Hopefully it will work this time.
"If you have more miles on your snow blower than your car, you live in New England." "If you can drive 75 mph through 2 feet of snow during a raging blizzard without flinching, you live in New England."
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drifter
Joined: Oct 13, 2010
Points: 115
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Re: New toy!!!
Reply #21 Nov 10, 2010 12:14 pm |
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Wow, that sucks Steve. Ice-dam formations can allow the backwater to get quite deep,,, well over a foot in some cases. This allows water to seep under the shingles, and down into your walls, rotting out studs, and causing mildew problems. Not good. I certainly hope your roofing contractor applied a membrane along the edge of that roof. One cheap solution would be to use heater-cables along the edge of the roof. These heater cables should be zig-zagged from the edge of the roof,,, and back to a point behind the wall below that part of the roof. The heater cables provide just enough warmth so that any ice forming around the cable melts, allowing drainage. Unfortunately, this will not eliminate your heat-loss. http://www.heatersplus.com/roofs.htm
This message was modified Nov 10, 2010 by drifter
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Steve_Cebu
Joined: Dec 17, 2009
Points: 888
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Re: New toy!!!
Reply #23 Nov 10, 2010 11:51 pm |
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Wow, that sucks Steve. Ice-dam formations can allow the backwater to get quite deep,,, well over a foot in some cases. This allows water to seep under the shingles, and down into your walls, rotting out studs, and causing mildew problems. Not good. I certainly hope your roofing contractor applied a membrane along the edge of that roof.
One cheap solution would be to use heater-cables along the edge of the roof. These heater cables should be zig-zagged from the edge of the roof,,, and back to a point behind the wall below that part of the roof. The heater cables provide just enough warmth so that any ice forming around the cable melts, allowing drainage. Unfortunately, this will not eliminate your heat-loss.
http://www.heatersplus.com/roofs.htm
Yeah it did suck but supposedly they have it all fixed now so we shall see in another month or so. No way to run cables we used to have them but the ice tore them down. The roof is insulated but that is where the sun really beats down. So hopefully we will not have any more huge ice.
"If you have more miles on your snow blower than your car, you live in New England." "If you can drive 75 mph through 2 feet of snow during a raging blizzard without flinching, you live in New England."
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drifter
Joined: Oct 13, 2010
Points: 115
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Re: New toy!!!
Reply #24 Nov 11, 2010 1:12 am |
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I hate to say this Steve, but unless you eventually get some sort of ventilation, between the top of the insulation and the underside of the roof, you're going to have the same ice situation. It's unavoidable. Snow lands on the warm roof,,,,melts from the bottom,,,water flows down towards eaves, and once that water reaches the eaves, it refreezes because there's no heat-loss to warm those over-hanging eaves from underneath. Water keeps coming,, , freezes,,,builds up the ice dam until the back of that dam reaches the warm part of the roof, and everywhere behind that dam is standing water. Sunshine really has very little to do with it.
Without proper ventilation, the only ice-prevention "fix", is to shovel the roof frequently, and not let the snow build up..
The next time you're up on the snow-covered roof, have a look at the granular ice-layer at the bottom of the snow-pack. That's where the snow has melted from contact with the warm roof. Snow "reflects" sunlight on top, while the blanket of snow traps heat underneath, melting from the bottom.
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Steve_Cebu
Joined: Dec 17, 2009
Points: 888
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Re: New toy!!!
Reply #26 Nov 11, 2010 11:00 am |
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I hate to say this Steve, but unless you eventually get some sort of ventilation, between the top of the insulation and the underside of the roof, you're going to have the same ice situation. It's unavoidable. Snow lands on the warm roof,,,,melts from the bottom,,,water flows down towards eaves, and once that water reaches the eaves, it refreezes because there's no heat-loss to warm those over-hanging eaves from underneath. Water keeps coming,, , freezes,,,builds up the ice dam until the back of that dam reaches the warm part of the roof, and everywhere behind that dam is standing water. Sunshine really has very little to do with it.
Without proper ventilation, the only ice-prevention "fix", is to shovel the roof frequently, and not let the snow build up..
The next time you're up on the snow-covered roof, have a look at the granular ice-layer at the bottom of the snow-pack. That's where the snow has melted from contact with the warm roof. Snow "reflects" sunlight on top, while the blanket of snow traps heat underneath, melting from the bottom. The roof itself is vented with holes under teh eaves, it was built that way. This is why we wanted a metal roof but way too expensive about twice as much. The thing is there is very little heat in that part of the house and it's almost impossible to get to it in the winter but yes if I had designed teh house it would not have been built like this. However after 20+ years from the last roof repair there was virtually no damage underneath the roof and no inside leaks. At least not until the 2 trees landed on it during the ice storm. Then we had a ton of leaks.
"If you have more miles on your snow blower than your car, you live in New England." "If you can drive 75 mph through 2 feet of snow during a raging blizzard without flinching, you live in New England."
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