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Framing

Build the bones of your home right — walls, floors, roofs.

Written by Pavel Vysotckii

BCIN-certified building designer & Quantity Surveyor · Updated June 2026

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Project Overview

Timeline
1-4 weeks for typical residential framing (depends on size and complexity)
Difficulty
Requires carpentry skills, understanding of load paths, and ability to read structural drawings
Starting at
$8-$15 per sq ft
Best Season
Year-round work, but extreme cold slows productivity and makes lumber brittle

Fixed Milestone Pricing

You approve each stage before it's paid

Overview

What is framing?

Framing is the structural skeleton that holds up your house. In Ontario, residential framing means building walls from 2x4 or 2x6 studs spaced 16 inches on center, floor systems from 2x8 to 2x12 joists (or engineered I-joists), and roof structures from rafters or pre-built trusses. Every piece of lumber carries a load — either dead load (the weight of materials) or live load (people, snow, furniture) — and transfers it down through walls to the foundation.

OBC Part 9 (the residential building code) spells out exactly how to frame: stud spacing, header sizing over windows and doors, double top plates, fire stops every 10 feet vertically, and sheathing attachment schedules. Load-bearing walls run perpendicular to floor joists and carry weight from above; partition walls just divide space. Headers are horizontal beams (often built from doubled 2x8s, 2x10s, or LVL) that span openings and redirect loads around windows and doors. Get the header size wrong and you'll see sagging floors or cracked drywall.

Lumber grades matter: #2 SPF is the standard for studs and joists, but long spans need engineered products like laminated veneer lumber (LVL), glued-laminated timber (glulam), or timber joist I-beams (TJI). Engineered lumber is stronger, straighter, and more expensive — but it lets you span 20+ feet without mid-span supports. Dimensional lumber (2x10, 2x12) works for shorter spans and costs less, but you need to check span tables in the code to make sure it won't bounce or sag.

Framing happens in stages: layout (chalk lines and measurements), bottom plates nailed to subfloor, studs cut and installed, double top plates tie walls together, sheathing (OSB or plywood) adds racking resistance, and openings get framed with cripple studs and headers. Framers use speed squares, framing nailers, and laser levels to keep everything plumb, level, and square. If the first wall is 1/4 inch out of square, the last wall will be 2 inches off — and your drywall crew will hate you.

Municipal building inspectors check framing before you insulate or drywall. They verify stud spacing, header sizes, fire stops, sheathing nailing, and lateral bracing. Miss an inspection and you might be ripping down drywall later to prove your studs are actually there.

When you need framing

  • Building a new house or addition from the foundation up
  • Opening up load-bearing walls in a renovation (need new headers or beams to carry the load)
  • Replacing rotted floor joists or rim boards in older homes
  • Framing a basement to add bedrooms, bathrooms, or living space
  • Building a new roof structure after removing old trusses or rafters
  • Adding a second story or dormer to an existing house
  • Fixing sagging floors by sistering new joists alongside old ones
Step by Step

The Process

What happens from start to finish

1

Layout and Bottom Plates

1-2 days

Snap chalk lines on the subfloor to mark wall locations. Cut and nail bottom plates (pressure-treated for exterior walls on concrete). Mark stud locations every 16 inches on center, and mark door/window openings.

2

Cut and Install Studs

2-5 days

Cut studs to length (92-5/8 inches for 8-foot ceilings with double top plates). Nail studs to bottom plate, check plumb with a level, and toenail or use a top plate jig. Install cripple studs under windows and above doors.

3

Top Plates and Headers

1-3 days

Nail single top plate, then add second top plate that overlaps corners and intersections to tie walls together. Build and install headers over door/window openings using doubled 2x lumber or LVL, resting on jack studs.

4

Sheathing

2-4 days

Nail 7/16-inch or 1/2-inch OSB or plywood sheathing to exterior walls, staggering vertical joints. Sheathing adds racking strength and provides nailing for siding. Leave 1/8-inch gaps for expansion.

5

Fire Stops and Blocking

1 day

Install horizontal blocking between studs at 10-foot vertical intervals (fire stops) to slow fire spread. Add blocking where needed for grab bars, heavy cabinets, or plumbing fixtures.

6

Floor and Roof Framing

3-7 days

Install floor joists (or I-joists) on 16-inch centers, add rim boards and bridging. Sheathe with 5/8-inch or 3/4-inch tongue-and-groove OSB. For roofs, install rafters or trusses, add collar ties, and sheathe with plywood.

7

Framing Inspection

1 day (inspection), 1-3 days (corrections if needed)

Municipal building inspector verifies stud spacing, header sizing, fire stops, sheathing nailing, and structural details before you insulate or drywall. Fix any deficiencies noted.

Pricing Transparency

Investment Guide

Framing costs depend on labour rates ($40-$70/hour per framer), lumber prices (which fluctuate dramatically), and project complexity. A straightforward room addition costs less per square foot than a complex renovation with multiple load-bearing wall removals.

Wall framing (interior partition or exterior)

$8-$15 per sq ft

Depends on: Simple 8-foot walls vs cathedral ceilings, number of openings, straight runs vs lots of corners

Floor framing system (joists, rim, subfloor)

$12-$20 per sq ft

Depends on: Dimensional lumber vs I-joists, span length, basement vs second-floor installation

Roof framing (rafters or trusses, sheathing)

$15-$25 per sq ft

Depends on: Simple gable vs hip roof, roof pitch, engineered trusses vs stick-framed rafters

Whole-house framing (new construction)

$25,000-$80,000

Depends on: House size (1,200 sq ft bungalow vs 3,000 sq ft two-story), open-concept vs lots of interior walls, pre-built trusses vs site-built roof

Single room addition framing

$5,000-$18,000

Depends on: Size (12x14 vs 20x24), new foundation connection, roof tie-in complexity, number of windows/doors

Load-bearing wall removal + beam installation

$3,000-$12,000

Depends on: Span (8 feet vs 20 feet), engineered beam cost (LVL, steel, glulam), temporary support during install, ceiling/wall patching

Permits
Permit Required
Building Permit$500-$3,000 (depends on project size)

What Affects the Price

Lumber prices swing wildly: 2x4 SPF studs ranged from $3 to $12 each between 2020-2023. Lock in quotes quickly or include price escalation clauses.Engineered lumber (LVL, I-joists) costs 2-3x more than dimensional lumber but allows longer spans and more open floor plansSecond-story framing costs more than ground-floor work due to scaffolding, hoisting, and safety equipmentDifficult site access (narrow lots, no truck access) increases labour time for material handlingWinter framing in Ontario is slower: frozen ground, shorter daylight hours, and framers working in insulated gearComplex roof lines (multiple valleys, dormers, skylights) double or triple roof framing time vs simple gable roofs

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Permits & Building Code

Ontario Building Code requirements

Permit / ApprovalAuthorityTypical Cost
Building PermitMunicipal building department$500-$3,000 (depends on project size)

Framing must comply with OBC Part 9 (houses and small buildings) or Part 4 (large buildings) depending on size and occupancy

Inspections typically happen after foundation, after framing but before insulation, after insulation, and at final occupancy

Structural drawings or engineered plans may be required for complex load conditions, long spans, or two-story additions

Some municipalities require truss drawings stamped by an engineer even for standard roof trusses

How You Pay

Fixed Milestone Pricing, Approved by You

Every framing project runs on fixed milestone pricing. The plan is signed before work starts, and you approve each stage before it's paid.

  • Plan Signed Before Work Starts

    Every milestone and its price is written into the contract up front — no surprise extras.

  • Review in the Live App

    Daily photos, inspection reports, and spend vs budget land in your client app at every phase.

  • You Approve Each Milestone

    A stage is only paid after you review the work and sign off in the app.

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Project Center

Framing

In Progress
Deposit15%
Cut and Install Studs25%
Top Plates and Headers30%
Final + Holdback30%

Milestone Progress

Milestone 3 of 4

Approved by you

Reduce your cost — see available rebates and incentives

GTA homeowners can stack federal, provincial, and municipal programs for significant savings.

Common Framing Mistakes That Cost You Later

  • Not checking for level, plumb, and square at every stage — errors compound and make drywall, flooring, and trim installation a nightmare
  • Undersized headers over windows and doors — leads to sagging, cracked drywall, and doors that won't close
  • Missing or incorrect fire stops — code violation that inspectors will catch, requires opening walls to fix
  • Installing studs with crown (natural bow) facing random directions instead of all the same way — makes drywall wavy
  • Skipping blocking for future grab bars, towel bars, or heavy cabinets — impossible to add solid backing after drywall is up
  • Using wet or green lumber that will shrink and twist as it dries — causes nail pops, cracks, and squeaky floors
  • Not coordinating with plumbers and electricians for wall penetrations — leads to cutting studs or joists later
  • Leaving sheathing gaps too tight (no expansion space) or too wide (structural weakness and air leakage)

Trusted by Ontario Homeowners

One licensed crew and a live client app on every framing project

Licensed

OBC Licensed, Insured & WSIB Covered

Live App

Daily Photos & Inspection Reports

Fixed Price

Milestones You Approve

Related Services

Insulation

Happens immediately after framing inspection — batt insulation goes between studs, spray foam fills cavities

Learn more

Electrical

Electricians rough-in wiring through studs and joists after framing is complete but before insulation

Learn more

Plumbing

Plumbers rough-in supply and drain lines through framed walls and floors, often before or alongside electrical

Learn more

Demolition

Removing old walls, floors, or roof structure before framing the new layout

Learn more

Additions

Every addition needs framing for new walls, floors, and roof to tie into the existing structure

Learn more
FAQ

Common Questions

What's the difference between 2x4 and 2x6 wall framing?
2x4 walls are 3.5 inches deep and hold R12-R15 insulation; they're standard for interior walls and older construction. 2x6 walls are 5.5 inches deep and hold R19-R22 insulation, making them better for exterior walls in cold climates. Energy codes in Ontario now push toward 2x6 exterior framing for better thermal performance. 2x6 framing costs about 20-30% more in materials and labour but pays back in lower heating bills.
Do I need engineered lumber or can I use regular 2x10 joists?
Depends on the span and load. OBC Part 9 includes span tables: for example, 2x10 #2 SPF joists at 16 inches on center can span about 14 feet for floors. Go longer and you need 2x12s or engineered I-joists. Engineered lumber (I-joists, LVL) spans farther, doesn't shrink or twist, and allows longer HVAC ducts to run through pre-cut holes. Cost is 2-3x higher, but you get more open floor plans and fewer support posts in basements.
How do I know if a wall is load-bearing?
Load-bearing walls run perpendicular to floor or ceiling joists and carry weight from above down to the foundation. In most houses, exterior walls are load-bearing, and there's usually one main interior load-bearing wall running down the center of the house. Check the basement or attic: if a wall sits directly above a beam or foundation wall, it's probably load-bearing. Never remove a wall without confirming — if you guess wrong, you'll have sagging floors or roof collapse. Hire a structural engineer or experienced framer to assess before you swing a sledgehammer.
What's a header and how do I size it?
A header is a horizontal beam that spans an opening (window, door, passageway) and carries the load from above around the opening down to jack studs on each side. Headers can be built from doubled 2x8, 2x10, or 2x12 lumber, or from a single LVL or glulam beam. Sizing depends on the span and the load: a 3-foot window in a non-load-bearing wall might only need a 2x4 laid flat, while an 8-foot opening in a load-bearing wall could need a doubled 2x10 or a 1.75-inch LVL. OBC Part 9 has span tables, but for anything complicated, get an engineer to spec the header.
Can I frame with steel studs instead of wood?
Yes, but it's less common in Ontario residential work. Steel studs (20-gauge or 25-gauge) are popular for commercial interiors and non-load-bearing partition walls. They don't rot, warp, or burn, and they're dimensionally stable. Downsides: steel conducts heat (thermal bridging), you need different fasteners and tools, and load-bearing steel framing requires engineering. Most Ontario framers stick with wood for houses because it's faster, cheaper, and easier to work with.
What are fire stops and where do they go?
Fire stops are horizontal pieces of 2x4 or 2x6 blocking installed between studs to slow the spread of fire up through wall cavities. OBC requires fire stops at every floor level and at 10-foot vertical intervals in tall walls. They also go at the top and bottom of soffits, around chimneys, and where walls meet floors. Inspectors check for fire stops during framing inspections — miss them and you'll be opening up walls to add blocking later.
How much does lumber cost right now?
Lumber prices are volatile. In early 2021, a 2x4x8 SPF stud hit $10-$12; by late 2022 it dropped to $3-$4; in 2024 it's around $4-$6. Plywood and OSB follow similar swings. Always get current quotes from lumber yards and lock in pricing before you commit to a framing contract. Some contractors include price escalation clauses if lumber spikes between quote and build.
What's the difference between a joist and a rafter?
Joists are horizontal framing members that support floors or ceilings — they run between walls or beams and carry vertical loads. Rafters are sloped framing members that support roofs — they run from the ridge board down to the top plate of exterior walls and carry roof loads (shingles, snow, wind). Floor joists are usually 2x8 to 2x12; ceiling joists are often 2x6 to 2x10; rafters are 2x6 to 2x12 depending on span and snow load. Pre-built roof trusses combine rafters and ceiling joists into one engineered unit.
Does stud spacing affect what drywall thickness I need?
Yes. Standard 1/2-inch drywall is designed for studs at 16 inches on center. If you frame at 24-inch spacing (allowed by code for some non-load-bearing walls and ceilings), you need 5/8-inch board to prevent sagging and waviness between studs. On ceilings, this matters even more: 1/2-inch drywall on 24-inch joist spacing will sag over time, especially in humid conditions like bathrooms or poorly ventilated rooms. The USG Gypsum Construction Handbook recommends 5/8-inch board for any ceiling application at 24-inch spacing, and for 16-inch spacing on ceilings, 1/2-inch is acceptable only if the framing is straight and level. Crooked or bowed studs telegraph through thin drywall — check framing alignment with a straightedge before the drywall crew arrives.
What deflection limit matters for steel stud walls that will get drywall?
Steel studs flex more than wood, and drywall cracks when the wall behind it moves. The industry standard is L/240 deflection for walls with drywall finish — meaning a 10-foot (120-inch) wall can deflect no more than 1/2 inch under wind or lateral load. For walls with tile, stone, or other rigid finishes, the limit tightens to L/360 (1/3 inch for a 10-foot wall). If the stud deflects more than that, you get joint cracking, fastener pops, and tape failures. This is why commercial drywall contractors specify heavier gauge steel (20-gauge instead of 25-gauge) for taller walls and why deflection track (slip track) is used at the top of non-load-bearing steel walls — it allows the structure above to deflect without transferring load to the wall and cracking the drywall.

Where we do this work

Based in Toronto, working across the GTA

TorontoMississaugaBramptonVaughanMarkhamRichmond HillAuroraOakvilleBurlingtonMiltonAjaxPickeringOshawaWhitbyHamilton

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One crew, one fixed plan, and the live app on every framing project. Daily photos, inspection reports, milestone pricing you approve — and a written warranty.

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Fixed Milestone Pricing
Licensed & Insured
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