Expert Q
Question:
I have a well-built 4-yr old 50 X 30 ft. bungalow with a well-pitched roof, fully-vented soffits, foot-square gable vents and three evenly-spaced ridge vents on east slope. Round patches of frost tend to form on top of the thick blown insulation in the attic cavity, right under the ridge vents, usually after a late spring snowstorm/windstorm, even when there is no snow at all on the roof. As the attic warms up, the ice melts and the water finds pinholes in the poly barrier.(The water is better at finding pinholes than I am!)Is an attic fan the solution? Perhaps installing absorbent baffles under each vent to dissipate the moisture?
Answer:
What you describe, I believe, are not ridge vents. A ridge vent is attached to the very ridge of the roof and if it has baffles, there is no way anything can blow in there. The situation you describe is most common with mushroom vents and in thoses cases, it is a matter of the domes on them being a bit too high so the wind can swirl in under them.
Answered By: Ren Molnar
More Questions & Answers ...
1.
I don't want my older parents to get ripped off by the roofer. I would like to know on their behalf: Should t ...
2.
We are about to have our roof replaced and have heard you many times talk about ridge vents. Can they be insta ...
3.
Last fall I had a furnace installed in the attic. (No basement, minimal crawl space). Previously I had a heat ...
4.
My father is having a new roof put on his house and would like your advice on continuous ridge venting. Here a ...
5.
I just had a roof replaced. The salesman who sold me that I didn't have enough ventilation. He suggested more ...
6.
I own a 45 year old house with a low slope roof (1:12) of hot tar and gravel. No attic, so the ceilings are c ...
7.
I have an L-shaped addition. There isn't venting in this roof & it has alot of ice buildup at eaves. I wi ...
8.
Our bungalow wasbuilt in 1956 and we are now replacing the roof again. The roofers are giving us mixed signal ...
9.
How do I effectively ventilate a Cathedral roof. I have a severe Ice damming issue and have had water seepage. ...
10.
I have a 7 year old row unit that faces south. I get a build up of ice ever year on the noth side. I have trie ...
11.
I have 24 year pre fab home and when I change my roof last I noticed that the space between the actic and the ...
12.
I have a well-built 4-yr old 50 X 30 ft. bungalow with a well-pitched roof, fully-vented soffits, foot-square ...
13.
Ren, a few weekends ago you mentioned on your station a roof cap ventilation system that you used on your hous ...
14.
You told me how to install the vent. I need to know if one has to buy this baffle assembly or can one build it ...
15.
I have the traditional flat, square style roof vent. Birds are nesting inside on the wire mesh. I need to remo ...
16.
It's early, insomnia. It is frustrating that my ground floor can be ice cold, but the upper floor can' ...
17.
I'm shopping for a house and recently looked at one that has a VERY shallow roof pitch. In addition, it ...
18.
I have a number of galvanized steel granaries on my farm. They have roof vents cut into the sloped roofs. When ...
19.
We have a roof turbine that is making so much noise every time it's windy. It sounds like a bird in pain. ...
20.
I'd like to know if you are aware of a product, such as a pan or a tray, that can be installed (suspended) ...
21.
Recently I was talking to a roofing demonstrator. He implied to me that all roofs could not use ridge vents. ( ...
22.
We have been getting some water in through the low slope top roof the last 2 winters. There is no air space fr ...
23.
Ren: Your radio show in Saskatoon, Saskatchewan is a taped version and played Saturday PM. I really miss you ...
24.
Is there any advantage to the types of ridge vent commonly available, i.e. the fibre mesh roll type versus the ...
25.
I want to insulate in between the roof joist. Is it ok to use 2" rigid foam, I heard that this will do the tri ...
26.
That rain storm that we had last week along with the strong winds blew some rain through my roof vent and down ...
27.
My metal roof has a cap but there is no air space through which air can escape. Under the metal roofing there ...
28.
In N. W. Ontario we tend to accumulate a lot of snow on the roofs of our homes during the winter. Will a typic ...
29.
The house the kids bought is 50 years old it is a bungalow that was converted into a story and a half. Whoever ...
