What Is First Fix Carpentry?

First fix carpentry is the early construction work that establishes a building’s framework and prepares it for later stages. It commonly includes wall framing, floor framing, roof and ceiling structures, and forming openings for doors and windows.

Much of this work eventually sits behind plasterboard, flooring, cladding and other finishes. Although you may not see it once the project is complete, it influences the shape, alignment and performance of the finished building.

At Skyline Concepts, we carry out carpentry for new builds, renovations and extensions across Perth. We know that a clean finish starts well before the skirting boards and doors go in.

In this guide, we explain what first fix carpentry includes, how it differs from second fix and what homeowners should understand before work begins.

What Does “First Fix” Mean?

First fix describes the earlier construction stage, before the finishing work is completed.

For carpenters, it generally involves setting out and constructing the framework that later trades and finishes rely on.

However, the term does not describe one identical package on every job. Some builders separate roof carpentry, structural framing and lock-up work into different contracts. Others group more of these tasks together.

We recommend checking the written scope rather than assuming “first fix carpentry” includes everything needed before plastering.

You may also hear electricians and plumbers use the term first fix. Their early work usually involves installing concealed services. First fix carpentry refers specifically to the carpentry scope.

What Does First Fix Carpentry Include?

The work depends on the building’s design and construction method. A timber-framed extension will have different requirements from a masonry home needing roof carpentry and internal partitions.

Setting Out

Setting out transfers the dimensions and positions shown on the plans onto the building site or existing structure.

This can involve establishing wall positions, openings, floor levels and reference lines.

Accurate set-out matters because early errors can carry through to later stages. A misplaced partition might affect a hallway width, wardrobe depth or kitchen layout.

At Skyline Concepts, we recommend resolving important dimensions before framing starts. Small changes are usually easier to address while the layout is still on paper.

Wall Framing

Wall framing can include both load-bearing walls and non-load-bearing partitions.

Depending on the design, the work may involve studs, plates, noggings, lintels, connections and bracing.

The frame needs to suit its intended role. A wall supporting part of the building requires a different assessment from a partition that simply divides two rooms.

We recommend following the construction documents and resolving discrepancies before proceeding. A carpenter should not have to guess whether a wall or opening is structural.

Floor Framing

Where a building has a suspended floor, the carpentry scope may include posts, bearers, joists and structural flooring.

This stage establishes the supporting arrangement beneath the finished floor.

For renovations, existing levels can make the work more involved. New framing may need to connect to an older structure while accommodating changes in height or alignment.

We recommend checking these junctions during planning, particularly where new and existing rooms will share a continuous floor finish.

Roof Carpentry

Roof carpentry may involve erecting prefabricated trusses or constructing a conventionally framed roof.

The scope depends on the design and may be treated as a separate carpentry package.

For extensions, the connection between the existing roof and the new structure deserves particular attention. Roof shape, structural support and space for services need to work together.

At Skyline Concepts, we recommend reviewing these connections before construction rather than leaving them to be resolved once the roof is open.

Ceiling Framing

Ceiling framing provides the framework required for the specified ceiling arrangement.

Its design may need to accommodate different ceiling heights, bulkheads, access openings and building services.

We recommend confirming significant ceiling features early. Air-conditioning routes, recessed details and architectural changes can affect the space available within the structure.

Door and Window Openings

First fix carpentry commonly includes forming the openings that will receive doors and windows.

The frame needs to account for the specified product dimensions, structural support and installation allowances.

We recommend confirming the actual door and window schedule before these openings are built. A nominal product size is not always the same as the required framed opening.

The timing of fitting the windows and door frames depends on the construction sequence and agreed scope.

Backing for Later Fixtures

Additional framing or backing may be needed behind the wall lining to support later fixtures.

Examples include wall-mounted cabinetry, handrails, shelving and selected bathroom fittings.

We recommend marking these locations before the walls are closed. It is easier to provide suitable backing while the frame is accessible than to open finished walls later.

First Fix vs Second Fix Carpentry

The main difference is the stage and purpose of the work.

First fix carpentry establishes the framework and prepares the building for subsequent construction.

Second fix carpentry generally involves fitting the visible finishing components after relevant linings and other preparatory work are complete.

Second fix work commonly includes:

• Hanging internal doors.
• Installing skirting boards.
• Fitting architraves.
• Installing selected door hardware.
• Completing trims and finishing details.

The boundary between the stages varies. Door frames, stair components and other items may be installed at different times depending on the project.

We recommend asking for an itemised scope so you know which components are included and when they will be fitted.

What About Lock-Up Carpentry?

Lock-up describes a stage when the building can generally be enclosed and secured.

Depending on the construction method, the associated carpentry may involve external doors, windows, cladding or other enclosure work.

It overlaps with the first fix sequence on some projects but is not always part of the same contract.

A useful distinction is:

• First fix: Establishing the framework and early carpentry.
• Lock-up: Completing the relevant work to enclose and secure the building.
• Second fix: Installing finishing carpentry.

These are practical descriptions. The construction documents and contract determine the actual responsibilities.

When Does First Fix Carpentry Happen?

First fix carpentry takes place early in construction, once the necessary supporting work is ready.

On a new build, the sequence depends on whether the building uses a slab, suspended floor, masonry walls or a framed structure.

On a renovation, initial investigation and demolition may be needed before the carpentry scope can be fully confirmed.

A typical sequence may involve:

1. Reviewing plans and existing conditions.
2. Establishing the set-out.
3. Completing the specified framing.
4. Checking openings, connections and alignment.
5. Coordinating concealed services and backing.
6. Completing required checks before work is covered.
7. Proceeding with linings and later finishes.

Different areas can progress at different times. The important point is that the framework and concealed details are ready before the next stage makes them difficult to access.

Why Is First Fix Carpentry Important?

It Establishes the Layout

The position of the framing affects room dimensions, openings and circulation.

An error at this stage can reduce usable space or create problems fitting later components.

We recommend checking critical dimensions against the intended finished layout, particularly in kitchens, bathrooms and compact rooms.

It Supports the Specified Structure

Where the scope includes structural carpentry, the members, connections and bracing need to follow the relevant design.

A building’s performance depends on the complete arrangement, not simply the size of individual pieces of timber.

Any proposed change to a structural detail should be checked through the appropriate project process before it is made.

It Affects the Final Finish

Uneven or misaligned framing can create difficulties for plasterboard, cabinetry, doors and trims.

Finishing trades may be able to accommodate some existing irregularities, but they should not be expected to correct avoidable framing errors.

At Skyline Concepts, we consider how the first fix work will affect the finished result. Straightforward details such as consistent openings and coordinated levels can make later work much cleaner.

It Helps Coordinate Other Trades

Framing and services share the same spaces.

Plumbing, electrical work and air-conditioning need to be coordinated without inappropriate alterations to structural members.

We recommend discussing service routes early, especially where the design includes large beams, tight ceiling spaces or substantial wall-mounted fixtures.

First Fix Carpentry in Perth Renovations

Renovations often involve more uncertainty than new construction.

Existing walls may be out of square, floor levels may vary and concealed conditions may differ from what the original plans suggest.

A sensible approach begins with understanding what is already there.

Connecting New and Existing Work

An extension needs more than a new frame positioned beside the old house.

Floor levels, wall junctions, roof connections and ceiling heights need to work together.

We recommend identifying these interfaces before construction so the quote and drawings reflect the actual work required.

Altering Internal Layouts

Moving or removing a wall can involve structural support, services and changes to surrounding finishes.

Do not assume a wall is non-loadbearing because it is thin or made from lightweight materials.

At Skyline Concepts, we recommend establishing its role before demolition. Where engineering or temporary support is required, that needs to be resolved before the wall is disturbed.

Dealing With Concealed Conditions

Opening an older building can reveal deterioration, previous alterations or unexpected construction.

We recommend discussing how discoveries will be documented and how any additional work will be approved.

A clear variation process helps keep decisions and costs understandable as the project develops.

What Should Be Decided Before First Fix Starts?

The more complete the design, the easier it is to coordinate the framing.

Important decisions include:

• Room dimensions and wall positions.
• Door and window selections.
• Ceiling heights.
• Cavity sliding door locations.
• Kitchen and bathroom layouts.
• Major cabinetry dimensions.
• Locations of fixtures needing backing.
• Significant service routes.
• Changes in finished floor level.

Not every paint colour or handle needs to be chosen at this stage. However, decisions that affect openings, support or concealed space should be resolved early.

For example, changing from a hinged door to a cavity slider can alter the framing arrangement. That is more involved than swapping the door leaf later.

What Should a First Fix Carpentry Quote Include?

A clear quote should identify the work, materials and responsibilities.

We recommend checking whether it covers:

• Labour only or labour and materials.
• Wall, floor, roof and ceiling framing.
• Structural flooring.
• Specified bracing and connectors.
• Door and window openings.
• Backing for fixtures.
• Connections to existing construction.
• Access equipment and lifting requirements.
• Demolition or temporary works.
• Waste removal.
• Exclusions and variations.

Also confirm which drawings and specifications the quote is based on. Revised plans can change quantities and construction details.

Avoid comparing two prices until you know they describe the same scope.

How Much Does First Fix Carpentry Cost?

There is no single rate that accurately covers every project.

The cost depends on the size and complexity of the carpentry package, whether materials are included and how much existing construction needs to be altered.

Other influences include:

• Timber and component specifications.
• Structural design.
• Access and delivery arrangements.
• Working height.
• Lifting equipment.
• Existing building condition.
• Coordination with other trades.
• Project staging.

We recommend having the work priced against clear documents and a site assessment where relevant.

A small structural alteration can involve substantial preparation and coordination, even if it uses relatively little timber.

How Long Does First Fix Carpentry Take?

The timeframe depends on the scope, construction method, access and readiness of the site.

A small partition package is different from the floor, wall and roof framing for an extension.

Delays can arise from incomplete selections, revised engineering, unavailable components or unexpected existing conditions.

At Skyline Concepts, we recommend confirming the sequence alongside the quote. Understanding what needs to be ready before the carpenters start helps avoid interruptions.

Common First Fix Carpentry Mistakes

Working From Incomplete Information

Unconfirmed openings or conflicting drawings can lead to rework.

Resolve discrepancies before construction reaches the affected area.

Leaving Important Selections Too Late

Door systems, cabinetry and services can influence framing.

Confirm anything that changes the structure or available space early.

Assuming Existing Construction Is Correct

Older walls and floors may not match the drawings or sit level and square.

Measure and assess before connecting new work.

Altering Framing Without Checking

Cutting or modifying a member can affect its intended function.

Use the appropriate approval process for changes.

Covering Work Before Checks Are Complete

Required inspections and checks need to happen while the relevant details remain accessible.

Coordinate the sequence before linings are installed.

Frequently Asked Questions

Is First Fix Carpentry the Same as Framing?

They overlap considerably, but first fix can include associated preparation beyond erecting frames. The exact package depends on the project and contract.

Does First Fix Carpentry Include Roof Work?

It may. Roof carpentry is included in some packages and priced separately in others. Confirm the scope rather than relying on the stage name.

Are Skirting Boards First Fix or Second Fix?

Skirting boards are generally second fix carpentry because they form part of the visible finish.

Is Hanging Doors First Fix Carpentry?

Hanging internal door leaves is generally second fix work. Preparing the opening, fitting frames and installing external doors may occur earlier, depending on the build sequence.

Can the Same Carpenter Complete Both Stages?

Yes. A carpentry team can carry out both first fix and second fix where the agreed scope covers them.

Is First Fix Carpentry Needed in a Brick House?

It can be. A masonry home may still require roof and ceiling carpentry, internal framing or structural carpentry associated with alterations.

First Fix Carpentry With Skyline Concepts

First fix carpentry establishes much of what the later construction depends on. Accurate set-out, suitable framing and coordinated details help the project progress towards a clean, practical finish.

Contact our team to discuss your plans and arrange a quote for your carpentry requirements.