https://waitohomeinspections.ca/

Waito Home Inspection Corporation, 428 Point Church Drive, Eganville, ON (2026)

08/09/2026

Your Hydro Meter Can Tell Me More Than How Much Electricity You Use

When we inspect an older home, we pay attention to the hydro meter — but we’re not just looking at the meter itself.

We’re looking at the meter base, enclosure, service entrance, conduit, wiring method and how the electrical service enters the building.

These components can provide valuable clues about the era in which the home was built or when the electrical system was upgraded.

The installation pictured here, with its large rectangular metal enclosure and small round meter, is characteristic of electrical equipment commonly associated with mid-20th-century construction — particularly the late 1940s through the 1950s, and sometimes into the early 1960s.

That doesn’t automatically date the house. Electrical services can be upgraded, meters can be replaced, and exterior finishes can change several times over the life of a building.

But it gives me somewhere to start.

And once we establish the likely construction era, We’re already thinking about what may be behind the walls.

A home from the 1940s or 1950s may contain:

* Board, fibreboard or other early sheathing materials
* Asphalt-impregnated building papers
* Plaster or early drywall systems
* Older insulation materials
* Little or no polyethylene vapour barrier
* Very different approaches to controlling air and moisture than we use today

That becomes particularly important when an older house has received new siding, modern windows, additional insulation, upgraded heating equipment and other renovations.

An older building envelope was often designed — intentionally or otherwise — to dry differently than a modern sealed enclosure.

Change one part of that system without understanding the rest, and moisture problems can follow.

That’s why an experienced inspection involves more than checking components individually.

The meter doesn’t tell me whether your vapour barrier is good or bad.

It gives me another clue about what generation of construction I’m dealing with — and where I should start looking next.

A house tells its story through the details.

You just have to know how to read them.

08/07/2026

You’re buying a house — but is the building envelope actually sealed? Hidden air leaks can mean condensation, mould, heat loss and expensive surprises behind finished walls.

DOES YOUR NEW HOME HAVE A CLOSED ENVELOPE?

A lot of people ask me during an inspection:

“Does this house have a vapour barrier?”

My answer?

Having plastic behind the drywall is only part of the story.

The real question is:

Is the building envelope continuous and sealed?

A proper envelope needs continuity around:

• Electrical boxes
• Plumbing penetrations
• Windows and doors
• Attic hatches
• Exhaust ducts
• Rim joists
• Wall-to-ceiling connections
• Basement transitions
• Renovations and additions

A hundred tiny holes can become one BIG air leak.

And when warm, moisture-filled indoor air escapes into a cold wall or attic cavity, it can reach the dew point.

Then you get condensation.

And condensation can eventually mean:

Wet insulation.
Frost in the attic.
Peeling paint.
Mould.
Damaged sheathing.
Wood deterioration.

HOW DO I LOOK FOR IT?

During a home inspection, I’m watching for clues.

Can I feel air movement around outlets?

Is the attic hatch weather-stripped?

Are bathroom fans actually exhausting outside?

Are penetrations properly sealed?

Is there staining or frost evidence in the attic?

Are there suspicious cold areas around windows, walls or ceilings?

This is also where thermal imaging can become extremely useful.

Under the right conditions, a thermal camera can help identify temperature anomalies, insulation voids and areas where air may be moving through the building envelope.

OLDER HOMES CAN BE ESPECIALLY INTERESTING

Older homes weren’t necessarily built with today’s concept of a continuously sealed envelope.

Then somebody:

Replaces the windows.

Finishes the basement.

Adds an addition.

Upgrades one wall.

Adds new insulation.

Now you may have three generations of building science trying to work together in the same house.

That’s when things get interesting.

And remember:

THE TIGHTER THE HOUSE, THE MORE IMPORTANT VENTILATION BECOMES.

Bathroom exhaust.

Kitchen exhaust.

HRV or ERV systems.

Indoor humidity control.

Fresh-air ventilation.

They all become part of the equation.

So before buying your next home, don’t just ask:

“Is there poly behind the drywall?”

Ask:

Is the envelope continuous?

Where are the weak points?

How is moisture controlled?

How is the house ventilated?

Because your building envelope isn’t simply a sheet of plastic.

It’s a system — from the basement floor, through the walls, right to the roof.

And understanding that system can tell you a whole lot about the house you’re about to buy.

08/07/2026

She burns off the mist so fast, you have to be quick to catch it!

08/06/2026

Come check out the hall! Bring the fam for lunch and get some goodies for the kids !

08/04/2026

A healthy home starts with moving moisture out before it has a chance to become a problem.

A good rule of thumb is to provide 50 cubic feet per minute (CFM) of exhaust airflow for each plumbing fixture unit in areas where moisture is generated, such as bathrooms. Properly sized and properly vented exhaust fans help remove warm, humid air before it can condense inside walls, ceilings, and attics.

Here are some of the best ways to keep mold and mildew from taking hold:

• Run the bathroom exhaust fan during showers and for 20–30 minutes afterward.
• Vent exhaust fans directly outdoors—never into an attic or crawlspace.
• Keep indoor relative humidity between 30% and 50%.
• Maintain a continuous, well-sealed vapour barrier to reduce moisture movement into wall cavities.
• Repair roof, plumbing, and foundation leaks as soon as they are discovered.
• Ensure kitchens, laundry rooms, and bathrooms have adequate ventilation.
• Use properly balanced HRVs or ERVs in today’s airtight homes.
• Keep gutters, downspouts, and grading directing water away from the foundation.
• Watch for warning signs such as peeling paint, condensation on windows, musty odours, or black staining around vents and corners.

Mold doesn’t appear overnight. It develops when moisture is allowed to remain where it shouldn’t. The best defense is controlling moisture at its source through good ventilation, a properly sealed building envelope, and routine maintenance.

Remember: You don’t just build a house—you build an environment. Keep it dry, and your home will reward you with cleaner air, better durability, and a healthier place to live.

— Bobby Waito
Waito Home Inspection Corporation

08/03/2026

🏠 Why Passive Homes Are Becoming More Popular in Canada

A Passive House is not simply a house with more insulation. It is a carefully designed building system that controls heat, air and moisture through:

✅ A highly insulated building envelope
✅ Exceptional airtightness
✅ High-performance windows and doors
✅ Reduced thermal bridging
✅ Balanced mechanical ventilation with heat recovery
✅ Proper orientation and controlled solar gain

In Canada, temperatures can swing from extreme winter cold to hot, humid summers. Passive construction can dramatically reduce the energy needed to heat and cool a home while maintaining a steady indoor temperature.

Passive construction is gaining attention because homeowners are looking beyond the purchase price and considering the lifetime operating cost of the building. Lower heating demand can provide protection against rising energy prices, while filtered mechanical ventilation helps maintain fresh air without uncontrolled drafts.

Comfort is another major selling point. In a properly built Passive House, interior surfaces remain warmer during winter, rooms have fewer cold spots, and temperatures remain more consistent from one floor to another. Better windows and thicker wall assemblies can also make the home noticeably quieter.

There is also a durability advantage—but only when the details are completed correctly. Airtightness, vapour control, flashing, insulation and ventilation must all work together. A small break in the building envelope can become a serious weak point when the rest of the house performs at such a high level.

Canadian building standards are also moving toward greater energy efficiency. Passive House principles can place builders and homeowners ahead of changing energy codes and performance expectations.

The trade-off is that Passive construction requires more planning, careful workmanship, energy modelling, blower-door testing and contractors who understand building science. It is not achieved by simply adding thicker insulation and calling the house “green.”

The Passive House movement is growing because Canadians are demanding homes that are:

💰 Less expensive to operate
🌡️ More comfortable year-round
🌬️ Better ventilated
🔇 Quieter
⚡ Less dependent on large heating and cooling equipment
🏡 Better prepared for future energy standards

The future of Canadian housing may not be about building bigger—it may be about building tighter, smarter and better.

08/02/2026

FROM PAPER-BACKED INSULATION TO CLOSED-CELL SPRAY FOAM: THE EVOLUTION OF THE CANADIAN VAPOUR BARRIER

The vapour barrier did not begin as the clear plastic sheet we recognize today.

Its development began when Canadian builders started placing insulation inside wood-framed walls. Insulation reduced heat loss, but it also made the outside portions of the wall colder. Warm, humid indoor air could then move into the wall, reach a cold surface and condense into water.

That hidden condensation could wet insulation, promote mould, stain finishes and eventually contribute to wood decay.

THE 1930s: RESEARCH IDENTIFIES THE PROBLEM

During the 1930s, Canadian researchers studied how water vapour moved through insulation and other building materials. They found that a material resistant to vapour movement could help prevent condensation when installed on the warm, interior side of the insulation.

By the mid-1940s, insulation, attic ventilation and vapour-retarding materials were already widely used in Canadian housing. The typical barrier was not polyethylene. It was usually asphalt-coated kraft paper attached to the face of an insulation batt or installed as a separate sheet. (Publications.gc.ca⁠)

1941: THE VAPOUR BARRIER ENTERS THE NATIONAL CODE

Canada’s first National Building Code was published in 1941, and it contained an early vapour-barrier requirement.

The original requirement was more conditional than today’s rules. It addressed wall assemblies in which moisture could pass through the interior and become trapped against materials on the colder side of the wall.

The National Building Code is a model code, however. Provinces, territories and municipalities adopted and enforced national requirements at different times. There was never one single day when the same vapour-barrier rule became law everywhere in Canada. (NRC Publications Archive⁠)

Ontario’s first province-wide building-code system took effect during the mid-1970s, with buildings throughout Ontario required to comply with the Ontario Building Code by December 31, 1975. (Environmental Registry of Ontario⁠)

THE 1940s TO 1960s: PAPER-FACED INSULATION

Through the postwar building boom, mineral-wool and later fibreglass batts were commonly manufactured with a waxed or asphalt-coated kraft-paper facing.

The batts were fitted between the studs with the paper facing the heated interior. The paper edges were stapled to the framing to create a vapour-retarding layer.

This system was better than having no vapour control, but it was difficult to make continuous. Every stud, electrical box, pipe, seam and poorly stapled edge created a potential opening.

Homes from this period may also rely on wax paper, foil-backed material, layers of oil-based paint or other vapour-resistant finishes rather than a recognizable plastic membrane. (Publications.gc.ca⁠)

A 1960 National Research Council publication described a sheet-type vapour barrier installed over the insulation and immediately beneath the interior finish as the simplest and most common approach in new construction. Code requirements continued evolving through the 1960 and 1965 National Building Code editions. (NRC Publications Archive⁠)

THE 1970s: POLYETHYLENE TAKES OVER

By the end of the 1970s, polyethylene had largely replaced kraft paper as the vapour barrier in conventional Canadian wood-frame housing.

Early installations sometimes used approximately 2-mil polyethylene, stapled over mineral-wool or fibreglass insulation. As standards developed, heavier polyethylene became common, eventually leading to the familiar 6-mil polyethylene sheet used in modern construction. (Publications.gc.ca⁠)

Polyethylene offered one major advantage: it could cover entire walls and ceilings as a continuous membrane.

When properly sealed at:

• seams and overlaps
• top and bottom plates
• windows and doors
• electrical boxes
• plumbing and wiring penetrations
• floor and ceiling transitions

the polyethylene could perform as both a vapour barrier and part of the home’s air-barrier system.

But simply hanging plastic over the insulation is not enough. A vapour barrier controls moisture movement by diffusion. An air-barrier system controls moisture carried through holes and cracks by moving air.

Air leakage can transport far more moisture into a wall than vapour diffusion alone. By the 1970s and 1980s, Canadian research increasingly recognized that homes needed both vapour control and a continuous air-barrier system. Beginning with the 1990 National Building Code, the code formally recognized that the vapour barrier and the airtight element could be provided by different materials. (Publications.gc.ca⁠)

TODAY: CLOSED-CELL SPRAY FOAM CAN PERFORM SEVERAL JOBS

Modern medium- or high-density closed-cell polyurethane spray foam represents the next stage in this evolution.

When correctly specified and installed at the required thickness, closed-cell spray foam can provide:

• thermal insulation
• resistance to vapour diffusion
• air-leakage control
• adhesion to irregular surfaces
• sealing around framing and penetrations

National Research Council guidance recommends a minimum thickness of approximately 40 millimetres—about 1½ inches—when medium-density spray polyurethane foam is intended to serve as both the insulation and vapour barrier in a wall. The exact accepted thickness and assembly must still follow the product evaluation, applicable standard, manufacturer’s instructions and local building-code requirements. (NRC Publications Archive⁠)

Natural Resources Canada also recognizes wall assemblies in which high-density closed-cell spray foam acts as the vapour barrier, eliminating the need for a separate interior polyethylene sheet. (Natural Resources Canada⁠)

That does not mean all spray foam replaces polyethylene.

Open-cell and low-density foams generally allow more vapour movement and may still require a separate vapour-control layer. Even closed-cell foam must be installed continuously, at the correct thickness and by qualified installers. Poor mixing, incorrect temperature, inadequate thickness, gaps, shrinkage or loss of adhesion can compromise its performance.

The wall must also be designed so that moisture is not trapped between two highly vapour-resistant layers. A wall needs an intentional drying direction.

EVOLUTION—NOT COMPLETE REPLACEMENT

Six-mil polyethylene remains an economical and effective vapour-barrier material and continues to be widely used.

Closed-cell spray foam is gradually assuming the role of the vapour and air-control layer in certain basements, roof assemblies, renovations and high-performance walls, but it is not a universal one-for-one replacement for poly.

The progression has been:

Asphalt-coated paper → paper-faced insulation batts → separate polyethylene sheets → sealed air-and-vapour barrier systems → closed-cell spray foam and other integrated building-envelope assemblies.

The materials have changed, but the goal has remained the same:

Keep warm, moisture-laden indoor air from reaching cold surfaces inside the building envelope—and give the wall a safe way to stay dry.

08/02/2026

FROM PAPER-BACKED INSULATION TO CLOSED-CELL SPRAY FOAM: THE EVOLUTION OF THE CANADIAN VAPOUR BARRIER

The vapour barrier did not begin as the clear plastic sheet we recognize today.

Its development began when Canadian builders started placing insulation inside wood-framed walls. Insulation reduced heat loss, but it also made the outside portions of the wall colder. Warm, humid indoor air could then move into the wall, reach a cold surface and condense into water.

That hidden condensation could wet insulation, promote mould, stain finishes and eventually contribute to wood decay.

THE 1930s: RESEARCH IDENTIFIES THE PROBLEM

During the 1930s, Canadian researchers studied how water vapour moved through insulation and other building materials. They found that a material resistant to vapour movement could help prevent condensation when installed on the warm, interior side of the insulation.

By the mid-1940s, insulation, attic ventilation and vapour-retarding materials were already widely used in Canadian housing. The typical barrier was not polyethylene. It was usually asphalt-coated kraft paper attached to the face of an insulation batt or installed as a separate sheet. (Publications.gc.ca⁠)

1941: THE VAPOUR BARRIER ENTERS THE NATIONAL CODE

Canada’s first National Building Code was published in 1941, and it contained an early vapour-barrier requirement.

The original requirement was more conditional than today’s rules. It addressed wall assemblies in which moisture could pass through the interior and become trapped against materials on the colder side of the wall.

The National Building Code is a model code, however. Provinces, territories and municipalities adopted and enforced national requirements at different times. There was never one single day when the same vapour-barrier rule became law everywhere in Canada. (NRC Publications Archive⁠)

Ontario’s first province-wide building-code system took effect during the mid-1970s, with buildings throughout Ontario required to comply with the Ontario Building Code by December 31, 1975. (Environmental Registry of Ontario⁠)

THE 1940s TO 1960s: PAPER-FACED INSULATION

Through the postwar building boom, mineral-wool and later fibreglass batts were commonly manufactured with a waxed or asphalt-coated kraft-paper facing.

The batts were fitted between the studs with the paper facing the heated interior. The paper edges were stapled to the framing to create a vapour-retarding layer.

This system was better than having no vapour control, but it was difficult to make continuous. Every stud, electrical box, pipe, seam and poorly stapled edge created a potential opening.

Homes from this period may also rely on wax paper, foil-backed material, layers of oil-based paint or other vapour-resistant finishes rather than a recognizable plastic membrane. (Publications.gc.ca⁠)

A 1960 National Research Council publication described a sheet-type vapour barrier installed over the insulation and immediately beneath the interior finish as the simplest and most common approach in new construction. Code requirements continued evolving through the 1960 and 1965 National Building Code editions. (NRC Publications Archive⁠)

THE 1970s: POLYETHYLENE TAKES OVER

By the end of the 1970s, polyethylene had largely replaced kraft paper as the vapour barrier in conventional Canadian wood-frame housing.

Early installations sometimes used approximately 2-mil polyethylene, stapled over mineral-wool or fibreglass insulation. As standards developed, heavier polyethylene became common, eventually leading to the familiar 6-mil polyethylene sheet used in modern construction. (Publications.gc.ca⁠)

Polyethylene offered one major advantage: it could cover entire walls and ceilings as a continuous membrane.

When properly sealed at:

• seams and overlaps
• top and bottom plates
• windows and doors
• electrical boxes
• plumbing and wiring penetrations
• floor and ceiling transitions

the polyethylene could perform as both a vapour barrier and part of the home’s air-barrier system.

But simply hanging plastic over the insulation is not enough. A vapour barrier controls moisture movement by diffusion. An air-barrier system controls moisture carried through holes and cracks by moving air.

Air leakage can transport far more moisture into a wall than vapour diffusion alone. By the 1970s and 1980s, Canadian research increasingly recognized that homes needed both vapour control and a continuous air-barrier system. Beginning with the 1990 National Building Code, the code formally recognized that the vapour barrier and the airtight element could be provided by different materials. (Publications.gc.ca⁠)

TODAY: CLOSED-CELL SPRAY FOAM CAN PERFORM SEVERAL JOBS

Modern medium- or high-density closed-cell polyurethane spray foam represents the next stage in this evolution.

When correctly specified and installed at the required thickness, closed-cell spray foam can provide:

• thermal insulation
• resistance to vapour diffusion
• air-leakage control
• adhesion to irregular surfaces
• sealing around framing and penetrations

National Research Council guidance recommends a minimum thickness of approximately 40 millimetres—about 1½ inches—when medium-density spray polyurethane foam is intended to serve as both the insulation and vapour barrier in a wall. The exact accepted thickness and assembly must still follow the product evaluation, applicable standard, manufacturer’s instructions and local building-code requirements. (NRC Publications Archive⁠)

Natural Resources Canada also recognizes wall assemblies in which high-density closed-cell spray foam acts as the vapour barrier, eliminating the need for a separate interior polyethylene sheet. (Natural Resources Canada⁠)

That does not mean all spray foam replaces polyethylene.

Open-cell and low-density foams generally allow more vapour movement and may still require a separate vapour-control layer. Even closed-cell foam must be installed continuously, at the correct thickness and by qualified installers. Poor mixing, incorrect temperature, inadequate thickness, gaps, shrinkage or loss of adhesion can compromise its performance.

The wall must also be designed so that moisture is not trapped between two highly vapour-resistant layers. A wall needs an intentional drying direction.

EVOLUTION—NOT COMPLETE REPLACEMENT

Six-mil polyethylene remains an economical and effective vapour-barrier material and continues to be widely used.

Closed-cell spray foam is gradually assuming the role of the vapour and air-control layer in certain basements, roof assemblies, renovations and high-performance walls, but it is not a universal one-for-one replacement for poly.

The progression has been:

Asphalt-coated paper → paper-faced insulation batts → separate polyethylene sheets → sealed air-and-vapour barrier systems → closed-cell spray foam and other integrated building-envelope assemblies.

The materials have changed, but the goal has remained the same:

Keep warm, moisture-laden indoor air from reaching cold surfaces inside the building envelope—and give the wall a safe way to stay dry.

Waito Home Inspection Corporation

08/09/2026

08/07/2026

08/07/2026

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