Step-by-Step Construction for a Chimney Chase Top

Chimneys can have chase tops installed for preventing rain and debris infiltration.

Many homeowners choose to cover their wide-open chimney tops with chimney chase tops. Chase tops safely cover a chimney's exit opening, preventing unwanted visitors from entering the chimney's length, such as nesting birds and bees building hives. The chase top's construction simply allows smoke to exit while providing an aesthetically pleasing appearance.

Things You'll Need

• Chase top flashing
• Chase top shroud
• Screws
• Nails
• Hammer
• Screwdriver
• 4-1.5-inch flashing spacers
• 12-0.5-inch sheet metal screws

Instructions

1. Screw or nail the chase top shroud together. Many manufacturers will ship a shroud in flat pieces to a customer or retailer, requiring a basic parts assembly. Depending on the shroud's design, install screws or nails to attach the shroud covering to the supportive legs by using a screwdriver or hammer.

2. Nail or screw in 4-1.5-inch flashing spacers to the chimney's bare opening using a hammer or screwdriver. Each spacer should be near each chimney corner. The spacers provide a gap between the chase top flashing and the chimney's combustible length for preventing any fire hazards during wood-burning season.

3. Place the chase top flashing over the spacers. Nail or screw the flashing to the spacers and chimney length with a hammer or screwdriver.

4. Place the chase top shroud on the flashing. Connect three sheet metal screws to each leg on the shroud, using a screwdriver and securing the shroud to the chimney's assembly.

5. Begin a fire in the fireplace. Observe the chimney chase top assembly as the smoke exits the building. Verify that the smoke is not being impeded by the shroud.

Tips & Warnings

• Do not alter or cover any shroud openings. The shroud is specifically designed to provide the best smoke ventilation while still protecting the chimney opening. Any alteration of the shroud's design may impede smoke movement or cause a potential fire hazard. In addition, use extreme caution while working at the chimney's edge. If possible, use safety harnesses for securing the installer to the building. Wear appropriate shoes for maneuvering on the rooftop.

References

• Perfection: Chimney Chase Tops
• Lennox Hearth Products: Installation Instructions For Closed Top Shroud Termination Kits