Jetmaster Built-In Fireplaces: Models, Flue Installation and Costing Guide
Guide Type: Buyer guide
Plan a Jetmaster built-in fireplace properly: room position, fireplace model, hearth, flue route, roof penetration and finishing allowances.
Quick answer
A built-in fireplace is a coordinated building element, not just an appliance. The allowance must cover the chosen unit, opening, hearth, flue path, roof penetration, wall finish, combustion air and installation by a competent professional.
How to compare the options
| Option | Best suited to | Include in the allowance |
|---|---|---|
| Built-in fireplace | A permanent focal point integrated into a new build or substantial renovation. | Unit selection, lintels or support, hearth, cavity details, flue route and roof flashing. |
| Freestanding fireplace | A visually lighter installation where a clear flue route is practical. | Hearth, clearances, floor protection, flue route and the surrounding finish. |
Cost and planning checklist
- Choose the room and flue route before roof drawings and ceiling layouts are final.
- Confirm required clearances, product documentation, roof penetration details and local approval requirements with the supplier and installer.
- Do not omit the chimney breast, hearth, insulation, trims and decorating reinstatement from the allowance.
Use the estimator
Build an early, region-aware allowance in the Price Your Build free estimator. It is a feasibility tool, not a supplier quotation, final design or professional certification.
Related Building Glossary guides
Frequently asked questions
Can a flue route be changed later?
It may be possible, but changes can affect roof members, ceilings, weatherproofing and clearances. Resolve it early in the design.
Does the estimator price every fireplace detail?
It provides an early allowance. The final appliance, flue length, finishes and installation scope must be confirmed by the supplier and installer.
Important
Confirm the final product, scope, installation method, drawings, approvals and professional requirements for the specific site before committing to work.