General & Code

Ontario Building Code (OBC)

Ontario’s regulation setting standards for building design, construction, and alteration.

The 2024 Ontario Building Code took effect in 2025, subject to transition provisions. It contains several parts, including provisions for houses and small buildings and for existing buildings. Use the current Ontario publications and confirm which edition and provisions apply to the project.

Frost depth

The depth reached by freezing conditions in the ground.

Foundation design must account for frost effects along with soil, water, loads, and the type of structure. A single depth is not a universal rule for every Ontario foundation. The applicable design may require frost-depth foundations or a permitted alternative.

Building permit

An authorization from the municipality for building work that requires approval.

A building permit addresses the submitted scope and applicable requirements. Drawings, zoning, other approvals, fees, and inspections vary by project. Electrical notification through ESA and regulated fuels work have separate approval routes; one permit does not cover every trade.

Building inspection

A review of construction at a required stage, often while work remains visible.

The permit sets the building inspection stages. Arrange them before covering work and resolve identified deficiencies before proceeding where required. Municipal building inspection, ESA inspection, and an engineer’s field review have different roles.

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Framing & Structural

LVL beam (laminated veneer lumber)

Laminated veneer lumber: an engineered wood member made from bonded veneers.

LVL can be used for beams and headers. The grade, depth, number of plies, connections, bearing, and supports must suit the actual loads. A span mentioned in another house’s renovation is not a beam specification for yours.

Glulam (glue-laminated timber)

A structural timber member made from graded lumber laminations bonded together.

Glulam can provide an exposed wood finish as well as structural support. Appearance grade, species, dimensions, connections, and service conditions affect the choice. Compare the complete installed design with LVL or steel rather than the beam price alone.

Load-bearing wall

A wall that supports structural loads from above in addition to its own weight.

Joist direction and stacked walls are clues, but they do not prove a wall’s role. Before removal, confirm the existing load path, accepted replacement design, temporary support, and required approvals. The supports below the opening matter as much as the beam above it.

Sistering

Adding a member alongside existing framing to reinforce or repair it.

A sistered repair needs a defined load-transfer path. Its length, bearing, fasteners, material, and any adhesive depend on the repair design. Simply fastening another board beside a damaged joist does not establish that the problem is solved.

PEng (Professional Engineer)

The designation of a professional engineer licensed in Ontario by Professional Engineers Ontario.

An engineer takes responsibility for engineering work within their scope of competence. Verify both the individual and the firm where public engineering services are offered. The required designer qualifications and seals depend on the building and proposed work.

Simpson Strong-Tie

A manufacturer of structural connectors, anchors, fasteners, and related building products.

Joist hangers, post bases, and hold-downs are examples. The specified model, fasteners, substrate, and installation details work together. Clear proposed substitutions with the responsible designer rather than choosing a part that merely looks similar.

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Decks & Patios

Helical pile

A steel foundation shaft with helical plates, screwed into the ground to support a structure.

The plates transfer load to suitable soil. Shaft size, installation depth, capacity verification, corrosion protection, and connections depend on the system and site. Ask for the accepted design and installation records; depth alone does not establish capacity.

Sonotube

A cylindrical form used to cast a concrete column or pier.

Sonotube is a brand name often used for round concrete forms. The form shapes the concrete; it does not determine the footing’s bearing capacity. Excavation, base size, reinforcement, concrete, frost protection, and loading time come from the foundation design.

316 stainless steel (hardware)

A stainless-steel alloy used where additional corrosion resistance is appropriate.

Exposure, wood treatment, compatible connectors, and manufacturer instructions determine the hardware specification. Type 316 is one option, not a universal Ontario deck requirement. Check the entire connection system and avoid incompatible metal combinations.

Pressure-treated lumber (PT)

Wood treated under pressure with a preservative to resist specified decay or insect hazards.

Choose the treatment and use category for the exposure, such as above-ground or ground-contact use. Follow the treatment supplier’s cutting, handling, coating, and hardware guidance. Treated wood still needs drainage and appropriate construction details.

Alkaline copper quaternary (ACQ)

Alkaline copper quaternary, one preservative used in pressure-treated wood.

The treatment protects against specified decay and insect hazards. It is one of several treatment chemistries, so read the lumber label. Fasteners and connectors must be compatible with the treatment and exposure; follow the suppliers’ instructions.

Western red cedar

A softwood used for decking, cladding, and trim, valued for its grain and workability.

Western red cedar’s properties vary with grade and the proportion of heartwood and sapwood. Drainage, exposure, installation, and maintenance affect performance. Keeping its original colour requires a suitable finishing plan; leaving it to weather gives a different appearance.

Composite decking

Manufactured decking commonly made from wood fibres and plastic.

Products differ in cap, profile, texture, heat response, and installation requirements. All-PVC decking is a different material category. Joist spacing, fasteners, and gaps follow the exact board and orientation; a universal 12-inch spacing rule is incorrect.

Ledger board

A structural member connecting one edge of an attached deck to suitable support at the house.

The connection needs a design for loads, fasteners, bearing, and water management. Brick veneer and other unsuitable surfaces cannot simply be treated as structural backing. A freestanding design may be appropriate where a sound house connection cannot be established.

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Kitchens

Shaker cabinet

A cabinet-door style with a simple frame around a recessed flat panel.

Traditional construction uses rails, stiles, and a centre panel, though manufactured versions vary. The plain shape works with many interiors. Door construction, finish, hardware, and cabinet boxes still determine quality; the style name does not.

Semi-custom cabinets

A cabinet range offering selected sizes, styles, finishes, and permitted modifications.

The available changes depend on the supplier. Compare box construction, drawers, hardware, fitting pieces, finish, and installation as well as door style. The useful question is whether the range can produce the layout you need.

IKEA SEKTION

IKEA’s modular kitchen cabinet system.

A kitchen quote needs the complete package: boxes, fronts, drawers, hinges, panels, fillers, accessories, assembly, and installation. Check current Canadian product availability and warranty terms. A cabinet-only cart total is not the installed kitchen price.

Quartz countertop

An engineered countertop material combining mineral content with binders and pigments.

Products vary in composition, pattern, thickness, and care instructions. Confirm supports, seams, cutouts, edge details, and heat precautions with the fabricator. Cutting and polishing require appropriate professional dust controls.

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Bathrooms

Curbless shower

A shower with no raised curb at its entry.

A flush entry can improve access, but a complete accessible layout also considers approach space, support, controls, and the user. Floor structure, drain position, slope, and waterproofing determine how the entry can be built. Curbless is one detail, not the whole accessibility plan.

Schluter Kerdi

A Schluter sheet membrane used as part of a bonded waterproofing system beneath tile.

The membrane works with compatible seams, corners, penetrations, and drain details. Substrate and mortar choices follow the current Schluter instructions. Approved options include the manufacturer’s specified mortars; an unmodified-only rule is incomplete.

RedGard

A liquid-applied waterproofing and crack-isolation membrane from Custom Building Products.

Approved substrates, application thickness, reinforcement, drying, and testing depend on the exact product instructions. The liquid membrane dries from pink to solid red. Colour alone does not prove that the required thickness or complete assembly is correct.

Hot mop

A waterproofing method using layers of hot asphalt and reinforcing felt, often for a shower receptor.

It needs a compatible receptor, drain, and installation method accepted for the project. Availability and local practice vary. Compare the complete assembly and qualified installer scope with sheet or liquid membranes; it is not automatically the cheapest option.

Mud bed

A shaped mortar layer used beneath tile, including to form a shower’s drainage slope.

A mortar bed can be formed on site to suit the floor and drain. Its placement relative to waterproofing depends on the assembly. Preformed trays are another option in suitable systems. Follow the selected design rather than mixing details from different systems.

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Finish Carpentry

Scribing

Transferring an uneven surface’s profile onto a piece so its cut edge fits that surface.

A compass, template, or gauge records the shape; careful cutting and repeated test fits bring the edge into place. It is useful for trim and fitted cabinets. Keep the visible lines intentional, and remove a little at a time. The wood you cut off is hard to put back.

MDF (medium-density fibreboard)

Medium-density fibreboard, a manufactured wood-fibre panel often used for painted interior work.

MDF offers a smooth surface without natural grain. Edges, fastening, dust control, and moisture exposure need attention. Product grades vary, and ordinary MDF is vulnerable to wetting. Choose the board for the location and finish its edges as specified.

Poplar

A relatively soft hardwood often used for painted trim and cabinet face frames.

Poplar can be shaped and fitted with ordinary woodworking tools and usually takes paint well after preparation. Its colour variation may be less desirable under a clear finish. It can still dent or react to moisture; it is not waterproof trim.

Built-in

Cabinetry, shelving, or seating fitted and secured to a particular space.

Examples include a library wall, mudroom bench, or desk in an alcove. Plan around what it must hold, then settle dimensions, shelf loads, hardware, services, fitting, and finish. More doors and drawers mean more work than an open shelf of the same length.

Crown molding

Decorative trim at the junction of a wall and ceiling.

The profile, room proportions, corner conditions, fixing, and finish determine the installation. Inside corners may be coped or joined by another suitable method. Matching existing crown starts with its actual profile and dimensions.

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Roofing

Asphalt shingle

A roofing covering commonly made from a fibreglass mat, asphalt, and protective mineral granules.

Products differ in profile, fastening, slope limits, wind requirements, and warranty terms. Performance depends on the complete roof assembly and installation. Warranty length is not a promised service life.

Standing-seam metal roof

A metal roof system with panels joined along raised seams.

Seams may be mechanically formed or use a snap-lock design. Panel type, substrate, clips, expansion, penetrations, and snow management all need specification. Compare complete assemblies and installation requirements rather than treating every metal roof as the same product.

Cedar shake roof

A roof covered in overlapping cedar shakes, distinct from smoother sawn wood shingles.

Grade, treatment, exposure, fasteners, underlayment, ventilation, and maintenance affect performance. Check the accepted installation and insurance requirements for the particular house. Shake and shingle details are not interchangeable.

Ice and water shield

A self-adhering roof membrane used to resist water entry beneath the roof covering.

Common applications include eaves and vulnerable details as specified by the design and product instructions. Required extent depends on the applicable assembly and rules. The membrane helps manage water backup but does not fix the attic heat loss that may contribute to ice dams.

Flashing

Material arranged at joints, edges, or openings to direct water out of the building assembly.

Roof and wall flashings work through their laps and integration with adjacent layers. Chimneys, windows, doors, and roof-to-wall junctions need different details. Sealant can have a role, but it cannot replace a missing water path.

Soffit and fascia

The soffit is beneath a roof overhang; the fascia forms its outer vertical edge.

A vented attic may use soffit openings for intake, with a clear path through the assembly. Other roof designs differ. Check drainage, ventilation, material condition, and gutter support when repairing the eave.

Drone roof survey

Aerial photography or video used to document visible roof conditions.

A survey can help record difficult-to-access slopes or storm damage. It cannot confirm every concealed defect or determine insurance coverage. Flight conditions, permissions, image quality, and the agreed inspection scope affect what the report can establish.

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Residential carpentry glossary.

General & Code

Ontario Building Code (OBC)

Frost depth

Building permit

Building inspection

Framing & Structural

LVL beam (laminated veneer lumber)

Glulam (glue-laminated timber)

Load-bearing wall

Header

Sistering

PEng (Professional Engineer)

Simpson Strong-Tie

Decks & Patios

Helical pile

Sonotube

316 stainless steel (hardware)

Pressure-treated lumber (PT)

Alkaline copper quaternary (ACQ)

Western red cedar

Composite decking

Ledger board

Kitchens

Shaker cabinet

Semi-custom cabinets

IKEA SEKTION

Quartz countertop

Bathrooms

Curbless shower

Schluter Kerdi

RedGard

Hot mop

Mud bed

Finish Carpentry

Scribing

MDF (medium-density fibreboard)

Poplar

Built-in

Crown molding

Roofing

Asphalt shingle

Standing-seam metal roof

Cedar shake roof

Ice and water shield

Flashing

Soffit and fascia

Drone roof survey