Local prefab fireplace repair for Lake Pickett homes

Inserts inside a factory-built fireplace

An insert placed inside a factory-built fireplace changes how that fireplace heats and vents. One maker's manual warns against installing an insert in its firebox unless the insert maker's instructions specifically state that this fireplace has been tested for use with that insert.

We read both labels and both manuals before an insert is discussed. If an existing insert sits in your prefab unit without that match, we explain what the documents say and what your options are.

The storm collar on the chimney pipe

A storm collar is the band clamped around a metal chimney just above where it leaves the roof. It sheds water off the pipe and over the cone below, so rain runs onto the roof instead of down the outside of the chimney.

A collar that has slipped or lost its caulk lets water run straight down the pipe into the attic or chase. We reset or replace the collar and reseal it, then check below for water damage.

• Collar tight to the pipe
• Waterproof caulk around its perimeter
• Cone openings left open
• Attic checked below for water

Minimum chimney height on a factory-built system

Factory-built fireplaces are tested with a minimum and a maximum chimney height. One maker's model needs at least 16 feet from the base of the fireplace to the top of the termination for a straight flue, more with two sets of elbows and no more than 50 feet in all, while a different model from the same maker sets 12 feet above the appliance as its minimum.

A chimney shortened during a roof job, or a system that was always short, can explain a stubborn draft problem. We measure the system against your model's figures.

Air conditioning, fans and draft

One maker's warranty notes that it is not responsible for inadequate draft caused by air conditioning and heating systems, mechanical ventilation or construction conditions that create negative pressure in the room.

That note points to where many draft problems start. Before replacing any part for a draft complaint, we look at the fans, returns and air handling near the fireplace and explain what we find.

• Air conditioning returns
• Bath and kitchen exhaust fans
• Mechanical ventilation
• Tight construction