Chimney & fireplace
Fireplace Repair Cost Calculator
Prices a fireplace repair, where firebox damage is a safety matter rather than cosmetic.
Result
A planning estimate, not a quote. Access, the age of the equipment, what is found once it is opened up and local labour rates all move the real figure, sometimes a long way.
Get a Free Business AuditHow the calculation works
Hours times crew times rate, plus materials and the call-out. Common repairs are firebrick and refractory panel replacement, repointing firebox joints with refractory mortar, damper repair or replacement, and smoke chamber parging. On a gas appliance it is the valve, the igniter, the thermopile or thermocouple, and the logs and media. The firebox work matters most because the firebox separates the fire from the building structure behind it.
What moves the number
- Whether the firebox or refractory panels are cracked, which is safety work.
- Damper condition and type, since a top-sealing damper is a different fitting.
- Whether the appliance is masonry or a prefabricated unit with listed panels.
- Gas component availability on older appliances.
Where this one goes wrong
Cracked refractory panels in a prefabricated fireplace are a reason to stop using it, not a cosmetic issue. Those panels are what contain the fire and protect the metal shell and the framing behind, and a crack beyond the manufacturer's allowable limit means the appliance should not be used until the panel is replaced with the correct listed part. Substituting a non-listed panel or patching it defeats the listing. In masonry fireboxes, use refractory mortar rather than ordinary mortar, since ordinary mortar fails at firebox temperatures. On gas, a fireplace that will not stay lit is usually the thermopile rather than the valve.
Before you quote
- Measure cracked refractory panels against the manufacturer's allowable limit.
- Use the correct listed replacement panels, not a substitute or a patch.
- Repoint fireboxes with refractory mortar, not ordinary mortar.
Where the rules come from
Questions
About this calculator
Are cracks in my firebox a problem?
In a prefabricated fireplace, a crack beyond the manufacturer's allowable limit means the appliance should not be used until the refractory panel is replaced with the correct listed part. Those panels contain the fire and protect the shell and framing behind, so it is a safety matter rather than appearance.
Can firebox cracks be patched?
Not in a listed prefabricated appliance, where the panel has to be replaced with the specified part. In a masonry firebox, joints can be repointed with refractory mortar, which withstands firebox temperatures where ordinary mortar fails. The distinction between the two appliance types matters here.
My gas fireplace will not stay lit. What is it?
Most often the thermopile or thermocouple, which generates the small voltage that holds the gas valve open and weakens with age. It is a modest part and a common failure. A valve replacement is a larger job and less frequently the actual cause.
The formula
total = hours x people x rate + parts + call-out, then sales tax
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How to use this calculator
- Hours on site (h). Enter your own figure; the page starts at 2 h.
- People needed. Enter your own figure; the page starts at 1.
- Labour rate charged ($). Enter your own figure; the page starts at $125.
- Parts and materials ($). Enter your own figure; the page starts at $65.
- Call-out or diagnostic fee ($). Enter your own figure; the page starts at $95.
- Sales tax (%). Leave at zero if you are quoting before tax.
The result updates as you type, so you can try a figure, see what it does to estimated total, and change it back. Nothing you enter is sent anywhere or saved.
A worked example
These are the figures the calculator opens with. Every number in the results column below is produced by the same calculation the page runs, so you can follow it through before putting your own figures in.
What goes in
| Input | Value |
|---|---|
| Hours on site | 2 h |
| People needed | 1 |
| Labour rate charged | $125 |
| Parts and materials | $65 |
| Call-out or diagnostic fee | $95 |
| Sales tax | 0% |
What comes out
| Result | Value |
|---|---|
| Estimated total main result | $410 |
| Labour | $250 |
| Before tax | $410 |
| Sales tax | $0 |
About $410: $250 of labour, $65 of parts and a $95 call-out.
How sensitive the answer is
Holding everything else steady and changing only labour rate charged, this is what happens to estimated total. It is worth knowing which of your inputs the answer actually hinges on, and which barely move it.
| Labour rate charged ($) | Estimated total |
|---|---|
| $63 | $286 |
| $94 | $348 |
| $125 example above | $410 |
| $188 | $536 |
| $250 | $660 |
Every other input is held at the example value while this one changes, which is not how a real job behaves. Treat it as a guide to which number matters most, not as five separate quotes.
What each figure means
- Hours on site (h)
- Measured in h, between 0 and 400, starting at 2 h.
- People needed
- A number, between 0 and 40, starting at 1.
- Labour rate charged ($)
- A money amount, starting at $125.
- Parts and materials ($)
- A money amount, starting at $65.
- Call-out or diagnostic fee ($)
- A money amount, starting at $95.
- Sales tax (%)
- Leave at zero if you are quoting before tax.
What the results tell you
| Result | What it is |
|---|---|
| Estimated total | The headline result. A money figure. |
| Labour | A money figure. |
| Before tax | A money figure. |
| Sales tax | A money figure. |
Estimating is the easy part
The jobs you never hear about cost more than the ones you mis-measure. BDEVY builds the marketing, systems and automation that bring them in.