Masonry Chimney Problems

Question 1

List 22 Masonry Chimney problems

Answer 1

1. Excessive offset from vertical
2. Chimney too short
3. Cleanout door too close to combustibles, loose or missing
4. No liner
5. Cracked or broken liner
6. Incomplete liner
7. Inadequate clearance from combustibles
8. Fire stopping missing or incomplete
9. Cap missing
10. Cap cracked
11. Improper slope on cap
12. No drip edge on cap
13. Creosote buildup in flues
14. Vent connector extending into chimney
15. Vent connector loose at chimney
16. Flue or vent connector obstructed
17. Draft inducer fan inoperative
18. Rusted chimney extender
19. Chimney extender stuck
20. Too many appliances on flue
21. Abandoned opening for flue connections
22. Undersized screen on spark arrester

Question 2

What is the maximum that a chimney can be offset from vertical?

Answer 2

30° maximum

Question 3

How far should a masonry chimney extend above the roof?

Answer 3

Three feet minimum and two feet above anything within 10 feet horizontally.

Question 4

What is the minimum total height for a chimney serving a wood stove?

Answer 4

Minimum 15 feet

Question 5

When did masonry chimneys start to get built with clay liners?

Answer 5

Approximately the 1950s

Question 6

You can tell whether a chimney is lined by looking for a liner extending above the top.

Answer 6

False

Question 7

Generally speaking, how far should wood framing members be kept away from masonry chimneys?

Answer 7

Minimum two inches

Question 8

Two wood burning fireplaces can share a single flue, as long as they are on the same floor level.

Answer 8

False