2007-11-27 05:30:52 · 9 answers · asked by griff 1 in Home & Garden ➔ Decorating & Remodeling
My friend was building a house, and was living in the basement during the winter as he was finishing the upstairs. He only had the exhaust stack partway up the side of the house. Luckily for him and their kids, his wife has a sensitive nose. She woke up and smelled the carbon monoxide filling the basement. The wind had picked up and was pushing the exhaust back down the stack. I drove out the next morning and we raised the stack over the roofline. He never had any more problems.
So you see, the stack must be over the rooftop so that exhaust gases can get disbursed properly without killing anyone in the home. I'm sure every municipality has their own rules governing the height, but better to be safe than sorry, eh?
2007-11-27 05:51:45 · answer #1 · answered by trickster44 2 · 1⤊ 0⤋
A lot of locals have ordinances that stipulate the hight that the chimney must be. It is usually so that any emission or hot ambers clear the roof line for safety reasons.
2007-11-27 13:35:20 · answer #2 · answered by FREDOAK3 3 · 0⤊ 0⤋
to prevent down draft ..as simple as that ..the wind plays all sorts of tricks as it passes over a roof ..that's the only reason to build above the ridge ...unless you are using the chimney as a feature
2007-11-28 10:38:12 · answer #3 · answered by boy boy 7 · 0⤊ 0⤋
Mainly to prevent down draft, but it also has to do with the way wind behaves around roofs and houses, building regs recomend a minimum of 900mm from ridge to head of pot. unless the chimney penetrates the roof lower down apex then it recommend the head of the pot to be a min of 1m (horizontily) away from the roof. These rules can vary from area to area but you can double check all rules in a collection of books called Brickwork 1, 2 and 3 by Nash.
2007-11-27 15:41:17 · answer #4 · answered by Fatowl 2 · 1⤊ 2⤋
among other reasons to prevent back draft. As I recall, the typical requirements are 2' clear from 10' away (horizontal distance).
2007-11-27 13:49:08 · answer #5 · answered by Paul C 3 · 1⤊ 0⤋
also so the wind blowing along the roof doesnt create a downdraft...2 ft. is the minimum 3 ft. would be alittle better...
2007-11-27 13:46:36 · answer #6 · answered by Anonymous · 2⤊ 0⤋
for safety reasons so the hot embers and smoke have a chance to blow clear
2007-11-28 13:44:08 · answer #7 · answered by john taylor 2 · 0⤊ 0⤋
so the smoke blows away
2007-11-27 13:42:54 · answer #8 · answered by Anonymous · 0⤊ 0⤋
to get rid of smoke
2007-11-27 13:47:07 · answer #9 · answered by country boy 5 · 0⤊ 0⤋