Regularly checking the top of the chimney and flashing is crucial, as this is the most common place for leaks to occur in the entire roof.
Here are the main reasons why it is worth doing this:
- Protection against flooding and mold
Leakage:
Even a small leak in the flashing allows water to flow directly into the house, causing stains on ceilings and walls.
Rotting roof trusses: Moisture getting under the sheet metal destroys the wooden roof structure and insulation (mineral wool), which drastically reduces the energy efficiency of the building.
Mold:
A damp wall near the chimney is an ideal place for fungi to grow, which pose a threat to the health of the household.
- Preventing the chimney from “bursting” (frost cycle)
Water that penetrates the gaps between the sheet metal and the brick freezes in winter. Ice increases in volume, leading to cracking of joints, bricks, and crumbling of the chimney cap. Regular inspection (preferably after each winter) allows for minor repairs with sealant before the entire chimney requires costly rebuilding.
- Fire safety and patency
Condition of the cap:
If the concrete “top” of the chimney cracks, debris can fall inside, blocking the flue or ventilation duct.
Flue gas tightness: A leaky chimney poses a risk of carbon monoxide or fire escaping into the house.
- Saving money
A minor repair of the silicone seal or re-hammering roofing nails costs pennies. A complete replacement of the flashing or rebuilding of a damaged chimney is an expense of several thousand zlotys.
Roofers and masons recommend having an inspection once a year, preferably in the fall before the heating season or in the spring after the worst frosts.
