Fireplace Insert Installation in Westlake Village, CA

Can my fireplace take an insert?

That depends on what sits behind the facing. An open masonry firebox with clay flue tiles, common in Westlake Village's pre-1970s homes, usually accepts a wood or gas insert. A factory-built prefab is different. Superior, Heatilator, Marco and Majestic fireboxes are listed appliances. You cannot drop any insert into them. Either the insert is listed for that exact firebox, or the whole firebox and metal chimney come out and a sealed direct-vent unit goes in.

A wood insert needs a continuous stainless liner. Collar to cap, no stub pipe. The damper plate usually gets cut out. A block-off plate above the smoke chamber stops heat from washing up the void. Slumped or displaced tiles in an older stack have to be dealt with first.

Direct-vent gas means coaxial pipe through the existing flue or chase, sealed glass, a gas supply and shutoff, and a receptacle for the blower. An old log lighter line is not always adequate for a sealed burner.

Most of the work is at the top. Rusted chase covers and cracked crowns are common. Step flashing at tile roofs fails too. Water coming down that shaft will ruin a new insert. Fix the cap and crown before anything goes in.