Spray Foam Insulation
Open-cell and closed-cell polyurethane foam that insulates and air seals in a single application. Used in attics, walls, basements, crawl spaces and commercial envelopes.
Mississauga, Ontario
Mississauga Insulation Company for Homes, Businesses & New Construction
NorthStar Spray Foam & Insulation Inc. installs spray foam, blown-in attic insulation, fibreglass batts, fireproofing and soundproofing across Mississauga and the Greater Toronto Area — for homeowners, property managers, industrial facilities and builders.
- Residential
- Commercial
- Industrial
- New construction & retrofit
- Based in
- 375 Admiral Boulevard, Unit 5, Mississauga
- Phone
- 416-318-4202
- Hours
- Monday – Saturday, 7:30 a.m. – 6:00 p.m.
Who we are
An insulation contractor based in Mississauga
NorthStar Spray Foam & Insulation Inc. works out of a unit on Admiral Boulevard, off Dixie Road in north-east Mississauga. That matters more than it sounds: being local means we can get to a site to look at it before quoting, rather than pricing a job from a phone call.
We install insulation in the buildings the GTA actually has — post-war bungalows with shallow attics, 1970s and 80s subdivisions with settled fibreglass, downtown semi-detached houses with knee walls, condominium and mixed-use retrofits, and the warehouses and manufacturing units that fill Mississauga’s employment lands. Each of those needs a different approach, and we would rather tell you which one applies than sell you the most expensive product on the list.
Our work covers spray foam insulation, blown-in attic insulation, attic insulation removal, fibreglass batt insulation, fireproofing and soundproofing.
Free quote
Tell us about your project
Three details is enough to get started. We will call you back to arrange a look at the space.
What we do
Insulation services in Mississauga & the GTA
Six core services. Each page explains what the work involves, where it suits, where it does not, and what drives the cost.
Blown-In Attic Insulation
Loose-fill fibreglass or cellulose blown across an attic floor to an even, measured depth. The usual choice for topping up an under-insulated attic.
Attic Insulation Removal
Vacuum removal of old, damaged or contaminated attic insulation, with containment and disposal, so the attic can be air sealed and re-insulated properly.
Fibreglass Batt Insulation
Pre-cut fibreglass batts friction-fit into walls, ceilings, basements and garages. Cost-effective and dependable when it is cut and fitted correctly.
Fireproofing
Spray-applied cementitious fire-resistive material and intumescent coatings for structural steel in commercial and industrial buildings.
Soundproofing
Acoustic treatment for walls, ceilings and mechanical rooms in homes, offices and multi-unit buildings, planned around how sound actually travels.
Where to start
Six signs a building has an insulation problem
Most people do not call an insulation contractor because they have been thinking about thermal resistance. They call because one room is unusable in January, or because something is happening at the roofline that was not happening last year. These are the six complaints we hear most, and what usually sits behind each one.
One room never matches the rest
A bedroom over the garage, a room under a cathedral ceiling, or the space at the end of a long duct run sits several degrees off the rest of the house all year. The thermostat is in the hallway, so the furnace has no idea. Cantilevered floors and knee walls are the usual culprits, and both are often insulated but not air sealed.
Spray foam insulationIcicles and ice at the eaves
Ice damming is a heat problem before it is a gutter problem. Warm air leaking into the attic melts snow on the upper roof, the meltwater runs down to the cold overhang and refreezes. Adding depth to the insulation without sealing the air leaks underneath it rarely stops it.
Blown-in attic insulationDraughts at floor level and cold basements
Air moves through a house from low to high in winter. Cold air pulled in at the rim joist, the basement header and around the sill plate is what makes the lowest floor feel unusable, and it is one of the smaller, more contained jobs on this list.
Rim joist and basement foamFrost or damp on the attic sheathing
Frost on the underside of the roof deck in February means humid indoor air is reaching a cold surface. This is a moisture and ventilation question as much as an insulation one, and it is worth diagnosing properly - insulating over the top of it can make matters worse rather than better.
Attic insulation removalInsulation that has been disturbed
Decades of trades crossing an attic leaves loose fill flattened into paths, pushed away from the eaves, or piled over a bathroom fan that vents into the space. Insulation only performs at an even, uninterrupted depth, and a compacted layer is not doing the job its label claims.
Attic top-upNoise carrying between rooms or units
Footsteps overhead, conversation through a party wall, or a mechanical room that can be heard from the corridor. Insulation absorbs sound within a cavity, which helps, but structural paths carry it around the cavity entirely - so the honest answer depends on how the assembly is built.
SoundproofingMore than one of these can share a single cause, and a few of them have causes that are not insulation at all. That is the reason we look at the building before quoting it — fixing the wrong thing is expensive twice over.
Who we work for
Residential, commercial and industrial solutions
The material might be the same; the job rarely is. Access, scheduling, coordination and documentation change completely between a house and an occupied office tower.
Residential
Houses, townhouses and condominium units - attics, basements, crawl spaces, walls and garages.
Read moreCommercial
Offices, retail, mixed-use and multi-unit residential buildings, occupied retrofits and new construction.
Read moreIndustrial
Warehouses, distribution centres and manufacturing facilities, including structural steel fireproofing.
Read moreBuilders & Contractors
Insulation subcontracting for builders and general contractors, from scope review through to close-out.
Read moreThe same six services reach four quite different customers, and who you are changes how a job runs more than what you need. Houses, semis and townhouses turn on symptoms and access; occupied commercial buildings turn on working hours, protection and coordination; warehouses and manufacturing facilities turn on scale; and builders and general contractors need a subcontractor who reviews the scope before pricing it. Each has a page of its own.
Mississauga is home, and most of our work is within a short drive of the shop on Admiral Boulevard. We also work regularly in Brampton, Concord and Etobicoke — see the full coverage area for what the local building stock changes about each one. If you want to know who you would be dealing with first, the about page covers it.
Feature service
Spray foam insulation
Spray polyurethane foam is the one product that insulates and air seals in a single application. It expands into the cavity it is sprayed into, which is why it suits irregular framing, rim joists, cathedral ceilings and crawl spaces where cutting batts to fit is slow and imperfect.
We install both open-cell and closed-cell foam. They are not interchangeable: they differ in density, in how they handle water vapour, and in how rigid the cured foam is. Closed-cell is the denser of the two and controls vapour movement; open-cell is lighter, more flexible and generally less expensive per unit of thickness.
Which one belongs in your building depends on the assembly — what is on either side of the foam, whether the space is vented, and what the wall or roof needs to do. That is a conversation worth having before anyone quotes a price.
Where spray foam is commonly used
- Attic roof lines and knee walls
- Basement and crawl space walls
- Rim joists and band joists
- Cantilevered floors over garages and porches
- Garage ceilings below living space
- Warehouse and industrial building envelopes
- Irregular framing in renovations and additions
Related reading
What we install
Four materials, and where each one earns its place
There is no best insulation, only the right one for a given assembly. What is on either side of it, how much depth the cavity has, whether the space is vented, and how accessible it is all move the answer. Here is the honest version of each, including what it is not good at.
Closed-cell spray foam
Insulation, air barrier and vapour control in one pass
The denser of the two foams. It cures rigid, restricts vapour movement and delivers more thermal resistance per inch than anything else on this list, which is why it wins in cavities where depth is limited and against surfaces that cannot be left to breathe.
- Suits
- Rim joists, crawl spaces, cantilevers, roof decks, steel buildings
- Strength
- Most resistance per inch; adds rigidity to the assembly
- Trade-off
- Highest material cost per inch installed
Open-cell spray foam
A lighter, more permeable foam that still air seals
Expands further and cures soft, which lets it fill awkward framing completely and makes it the better sound absorber of the two foams. It stays vapour-permeable, so where it belongs depends entirely on what sits either side of it in the assembly.
- Suits
- Interior walls, deep cavities, sound-sensitive spaces
- Strength
- Fills irregular framing; absorbs sound well
- Trade-off
- Needs more depth for the same thermal resistance
Blown-in loose fill
Fibreglass or cellulose at an even depth
The standard answer for an open attic floor. It flows around joists, wiring and bracing in a way batts never manage, and depth can be built up to whatever the attic needs. It does not air seal on its own, so the ceiling plane below it has to be sealed first.
- Suits
- Open attic floors, top-ups over sound existing insulation
- Strength
- Even coverage around obstructions; cost-effective by depth
- Trade-off
- Air sealing is a separate step, not a by-product
Fibreglass batts
The right answer in a clean, regular cavity
In a stud bay that is square, accessible and free of obstructions, a correctly fitted batt is efficient and economical. The whole of its performance rests on the fit: compressed, gapped or cut short around a wire, it quietly under-performs its label.
- Suits
- New framing, basement walls, garages, regular stud and joist bays
- Strength
- Economical where the cavity is straightforward
- Trade-off
- Performance depends entirely on installation quality
Two of these seal air as they insulate; two do not, and need the air sealing done as a separate step first. That distinction matters more than the number on the packaging, because an assembly that leaks air will underperform whatever is installed in it. If you want the longer comparison, the guide on choosing insulation for a Mississauga home sets them side by side, and open-cell vs. closed-cell foam goes deeper on the two foams.
Most requested
Attic insulation solutions
The attic is where most GTA houses lose the most heat, and where the cost of fixing it is usually lowest per unit of benefit. There are three separate jobs people call “attic insulation”, and they are worth telling apart.
Topping up
Existing insulation is dry, clean and simply too shallow. We air seal the penetrations we can reach, then blow loose-fill over the top to an even, measured depth.
Blown-in attic insulationRemoval and replacement
Insulation that is wet, compacted, smoke-damaged or contaminated by pests comes out first. The attic floor is then sealed and re-insulated from a clean start.
Attic insulation removalInsulating the roof line
Where the attic contains ducts or is being converted to living space, foaming the underside of the roof brings the space inside the building envelope instead.
Spray foam insulationBuilding envelope
Where a GTA building actually loses its heat
Heat leaves a building two ways: by conducting through the materials, and by riding along on air that escapes. Insulation addresses the first. The second is about holes — and the holes are almost always in the same dozen places, whichever decade the building went up in.
- Attic hatchOften a bare sheet of plywood sitting in an unsealed frame - a hole straight into the attic.
- Pot lightsOlder recessed fixtures vent warm, humid air directly into the insulation above them.
- Top platesThe gap where interior walls meet the attic runs the full length of every partition.
- Plumbing stacksThe oversized hole cut for a vent stack is rarely sealed once the pipe goes through it.
- Bathroom fansDucts that stop short of the roof dump moist air into the attic all winter.
- Rim joistThe band around the floor structure is thin, often bare, and sits right at the cold line.
- CantileversFloors projecting over a garage or porch are exposed on five sides instead of one.
- Garage ceilingsLiving space over an unheated garage loses heat downward into a cold, ventilated box.
- Basement headerThe perimeter above the foundation wall is a continuous cold bridge if left uninsulated.
- Knee wallsShort walls in a converted attic are insulated far more often than they are air sealed.
- Ductwork in cold spaceSupply runs above the insulation deliver heat to the attic before they reach the room.
- Chimney chasesThe framed shaft around a flue is a vertical channel from the basement to the roof.
This is why an attic top-up on its own can disappoint. Loose fill laid over an unsealed ceiling still lets air move straight through it, so the depth reads well on paper while the building carries on leaking. Sealing those penetrations first is unglamorous, largely invisible once finished, and usually the part of the job that does the most work.
How it works
What happens between your first call and a finished job
No stage of this is unusual, but knowing the shape of it makes the quotes you receive easier to compare — including ours against someone else’s.
Tell us about the building
Property type, roughly what area is involved, and the problem you are trying to solve. That last part matters most - a cold room, a noise complaint and a failed inspection lead to three different scopes even in the same house.
We come and look
Quotes given over the phone are guesses. We look at the space, the existing insulation, the access and what is already behind the drywall, because those are the things that change the price and none of them are visible from a phone call.
You get an itemised scope
Written down: what is being removed, what is being installed, where, to what depth, and what preparation the job needs. If more than one approach would work, you get the options and the reasoning rather than a single take-it-or-leave-it number.
Preparation and protection
Containment, floor and surface protection, and the ventilation arrangements the work requires. On occupied and commercial sites this is also where access, working hours and coordination with other trades get agreed.
Installation
Air sealing first where the assembly calls for it, then the insulation itself, installed to the specified depth or thickness. Spray foam is applied by installers in the respiratory protection the product requires, with re-entry timing set by the manufacturer, not by the schedule.
Walkthrough and clean-up
We clear the site, then walk it with you against the scope so you can see what was done and where. Anything that came up during the work - a bathroom fan venting into the attic, a wet patch on the sheathing - gets pointed out whether or not it was part of the job.
We do not publish a job length, because it depends on the scope, the access and what turns up once the space is opened. You get a realistic estimate once the assessment is done, from someone who has seen the building.
Why NorthStar
How we work
Four things that shape how we quote and how we run a job. None of them is a slogan — each one costs us work occasionally, which is rather the point.
We look before we quote
Insulation quotes given over the phone are guesses. Access, existing conditions and what is behind the drywall change the scope, and none of them are visible down a phone line. We assess the space first, then price it.
We say when the cheaper option is the right one
Not every assembly needs spray foam. If batts or blown-in will do the job in your building, that is what we recommend and quote — even though it is the smaller invoice. Selling the wrong product well is not a business worth having.
One contractor across the whole range
Removal, insulation, fireproofing and acoustic work under one company. That matters on projects where those trades have to be sequenced against each other, and it means nobody is waiting on a second subcontractor to turn up.
Set up for a house or a warehouse
A single attic and a scheduled industrial envelope are different jobs, not different scales of the same one. We are equipped for both, including coordination with other trades on an active construction site.
For the trade
Builders and general contractors
If you are tendering insulation on a subdivision, an infill, a commercial fit-out or an industrial build, we quote from drawings and specifications, review the scope before pricing it, and schedule around the trades ahead of us.
We would rather flag a conflict between the insulation spec and the assembly at tender stage than discover it at rough-in inspection.
Typical project types
- Residential subdivisions and townhouse blocks
- Custom homes and major renovations
- Infill and second-suite conversions
- Commercial fit-outs and base-building work
- Industrial and warehouse construction
- Structural steel fireproofing packages
Coverage
Mississauga and the GTA
Mississauga is our home base and the majority of our work is within a short drive of it. We also work regularly in the neighbouring communities below.
Brampton
Detached and townhouse subdivisions, plus industrial units through the Steeles and Airport Road corridors.
Insulation in BramptonConcord
Warehouse, distribution and manufacturing space around Highway 7 and Keele, alongside residential work in Vaughan.
Insulation in ConcordEtobicoke
Post-war bungalows and semis with shallow attics, plus mid-rise and mixed-use buildings along the lakeshore.
Insulation in EtobicokeInsightsSpray Foam Spray Foam Attic Insulation
Guides to help you decide
How Much Does Spray Foam Insulation Cost in Mississauga?
There is no single price for spray foam. The cost of a project is set by the foam type, the thickness the assembly needs, the area being covered, how hard that area is to reach, and what has to happen before spraying starts. Here is how each factor moves the number.
Read the guideOpen-Cell vs. Closed-Cell Spray Foam: Which Should You Choose?
Open-cell and closed-cell foam are both sprayed polyurethane, but they behave differently enough that they are not interchangeable. The right one depends on the assembly you are insulating, not on which is generally "better".
Read the guideBlown-In vs. Spray Foam Attic Insulation: What Is Better for Your Home?
These two options do not just differ in material — they change where the insulated boundary of your house sits. That decision affects ventilation, moisture and cost far more than the R-value on the label does.
Read the guideFrequently asked questions
What areas does NorthStar Insulation serve?
We are based on Admiral Boulevard in Mississauga and work throughout the western and central GTA, including Mississauga, Brampton, Etobicoke, Concord, Vaughan, Toronto, Oakville, Milton, North York and Markham. If your project sits just outside that list, call us and we will tell you honestly whether we can take it on.
Do you work on both homes and commercial buildings?
Yes. The same company handles attic top-ups in a semi-detached house and spray foam in a distribution warehouse. Residential, commercial and industrial work each have their own page describing how we approach them, because the scheduling, access and documentation requirements are genuinely different.
How much does insulation cost?
It depends on the material, the area, the thickness the assembly needs, how accessible the space is, and whether existing insulation has to come out first. We do not publish flat per-square-foot prices because a number quoted without seeing the building is usually wrong. We assess the space and give you an itemised quote.
Is spray foam always the best choice?
No. Spray foam is excellent where you need insulation and air sealing in one step, or where the space is irregular. But fibreglass batts or blown-in insulation are often the better value in a straightforward, accessible assembly. We recommend based on the assembly in front of us, not on what costs the most.
How do I get a quote?
Call 416-318-4202, email info@northstarinsulation.ca, or send the quote form on our contact page. Tell us the property type, roughly what area is involved and what problem you are trying to solve, and we will arrange an assessment.
What are your hours?
We are open Monday to Saturday, 7:30 a.m. to 6:00 p.m..
Get a free quote for your insulation project
Tell us about the building and what you are trying to solve. We will review the scope and get back to you with a clear, itemised quote.
Contact
Get in touch
Call us, email us, or send the quote form and we will get back to you to arrange an assessment.
- Phone416-318-4202
- Emailinfo@northstarinsulation.ca
- HoursMonday – Saturday, 7:30 a.m. – 6:00 p.m.
Our office
NorthStar Spray Foam & Insulation Inc.375 Admiral Boulevard, Unit 5
Mississauga, Ontario L5T 2N1
Canada
Admiral Boulevard runs off Dixie Road, just north of Highway 401 in north-east Mississauga.