Chimney & Fireplace Masonry (D12)
Chimneys and fireplaces combine craftsmanship with critical safety requirements – code violations can be deadly.
This BidScope guides you through masonry fireplace construction: firebox construction with firebrick capable of withstanding 2000°F+ temperatures, smoke chamber design and proper pargeting (smooth coating to direct smoke), damper installation and sizing, and chimney construction rising from foundation to cap.
Learn flue requirements: clay tile flue liner (traditional, durable, code-required for masonry chimneys), stainless steel liner for inserts or relining damaged flues, proper sizing by BTU output and chimney height.
Understand critical safety clearances: combustible materials must be 2 inches from masonry chimney exterior, through-roof chimney must extend 3 feet above roof penetration and 2 feet above anything within 10 feet (3-2-10 rule).
Master foundation requirements: chimney foundations separate from house foundation (different settling rates), adequate footing depth below frost line, proper sizing for chimney weight.
Navigate chimney crown and cap construction: concrete crown with overhang to shed water, metal cap to prevent rain entry and wildlife, spark arrestor where required.
Learn inspection and repair needs: tuckpointing mortar joints, relining flues, crown repair, flashing repair at roof penetration.
Understand when complete rebuilds are necessary versus targeted repairs.
Know Utah-specific challenges: freeze-thaw damage to mortar, wildlife nesting (especially swifts and bats), altitude effects on draft.
Calculate realistic costs – masonry fireplace and chimney construction is expensive skilled labor.
This tool ensures your chimney is safe, code-compliant, and built to last generations.
What’s Included:
- Masonry fireplace construction vs inserts vs factory-built
- Firebox construction (firebrick, refractory mortar)
- Firebrick specifications (rated 2000°F+)
- Firebox dimensions and proportions
- Throat and damper sizing
- Smoke chamber design and construction
- Smoke chamber pargeting (smooth coating)
- Damper installation and operation
- Chimney construction from foundation
- Flue liner requirements (clay tile, stainless steel)
- Clay tile flue liner (traditional, code-required for masonry)
- Stainless steel liner for inserts or relining
- Flue sizing by BTU output and height
- Multiple flues in single chimney
- Chimney height requirements (draft, clearance)
- Safety clearances (combustibles 2 inches from exterior)
- Through-roof clearance (3-2-10 rule: 3 ft above penetration, 2 ft above anything within 10 ft)
- Chimney foundation requirements (separate from house, adequate depth)
- Foundation below frost line (36-48 inches Utah)
- Footing sizing for chimney weight
- Corbeling and offsets
- Chimney exterior finish (brick, stone, stucco)
- Chimney cap and crown construction
- Concrete crown with drip edge
- Metal chimney cap (rain, wildlife, spark arrestor)
- Spark arrestor requirements
- Flashing at roof penetration (step flashing, counter flashing)
- Cricket/saddle behind chimney (width over 30 inches)
- Ash dump and clean-out door
- Hearth extension requirements (16-20 inches in front)
- Hearth construction (noncombustible materials)
- Inspection and maintenance
- Tuckpointing mortar joints
- Flue relining when needed
- Crown repair
- Flashing repair
- Creosote removal and chimney sweeping
- Complete chimney rebuilds
- Structural issues and leaning
- Utah freeze-thaw damage
- Wildlife prevention
- Draft problems at altitude
- Code compliance (IRC, NFPA 211)
- Finding experienced chimney masons
- Cost factors (height, complexity, materials)
- Fireplace insert installation in masonry fireplace
