Exterior Chimney Chase Construction

But a rot problem would better be blamed on construction or flashing errors that allowed leaks into the chase.

Exterior chimney chase construction.

If your home has a wood chimney chase with wood lap siding you need to pay special attention to it. Frame the chase so the bottom of the vent is. Build chase of fireplace just like any other wall structure by placing its uprights between plates and top plates to create a large box. Typically uses 2x4 structural members sheathed with osb or plywood exterior building sheathing.

Wood siding on chimneys wood shingles are often used as siding material for chimneys continuing from the roof area. There are a disproportionate number of wood chimneys with rotted siding and wall sheathing when compared to other types of siding and other locations. Framing the chimney chase. Chimney chase a fireplace chase is essentially a knock out area of structure that hides a metal fireplace or cement blocks in a fireplace.

Above the chase height as per manufacturer. Fire stop at attic and roof deck. For chimney chases built into gable walls we install a partial diverter see image 2 again extending the sloped surface several inches beyond the corner see image 3. Right since the chimney chase carries an insulated metal flue rated for zero clearance possibly actually requiring an inch or more of airspace and because the chase is outside the building it s not normally insulated.

Keep minimum clearance from pipe to combustibles. Crickets are more reliable particularly in climates where snow can accumulate and lead to ice dams.