Attic Insulation & Ventilation
A warmer second floor starts above the ceiling. We inspect what is accessible, seal what we can reach, protect the ventilation route, and top up to an even depth.
Read the full scope →Find the leaks. Fix the comfort.
Your second floor is not cold because the house is old. It is cold because warm air keeps leaving.
Latchline is a six-person, owner-led crew working on the building envelope of Toronto homes: attics, basements, and the openings between them. We look before we recommend.
The stack effect, drawn to scale
Warm air rises, finds the openings in your ceiling, and leaves. Outdoor air comes in low to replace it. Select any marked point to see what sits there.
Start here
Tell us what you have noticed, not what you think you need.
Most people arrive knowing a room is uncomfortable and not much else. That is a perfectly good starting point. Pick whichever line below sounds most like your house.
Cold second floorBedrooms that never catch up in winter.Attic inspection
Noticeable draftsMoving air at baseboards, outlets or hallways.Air-sealing assessment
Cold floorsChill through the floor on the level above the basement.Basement and rim joist
High heating billsCosts that seem out of step with the house.Scope planner or estimator
Ice damsRidges of ice and icicles at the roof edge.Attic and ventilation review
Uneven temperaturesRooms that never agree with each other.Whole-envelope review
Musty basementDamp smell, or dampness you can see.Moisture-first assessment
Renovation coming upWalls about to be closed in.Pre-renovation planning
The work
Three services. One system.
Air, heat and moisture move through a house together. We treat them that way, which is why the assessment usually matters more than the material.
Air Sealing & Draft Control
Stop treating every cold spot as an insulation problem. We follow the paths air is actually taking and close the ones that are worth closing.
Read the full scope →Basement & Rim-Joist Insulation
Comfort problems often begin at the bottom of the house. The rim joist runs the whole perimeter and is usually the coldest board in the building.
Read the full scope →We do not quote an R-value in isolation, and we do not promise a rebate before eligibility has been confirmed by the people who determine it.
How a project runs
Investigation first. The scope is the deliverable.
By the time we quote anything, you should already understand why. If the explanation does not make sense to you, the scope is wrong or we have explained it badly. Either way it is our problem, not yours.
You describe the problem
Which rooms, which season, how long, and what changed. A renovation, a new roof or a furnace swap often matters more than the year the house was built.
We inspect what is safe to reach
Attic, basement, and the transitions between them. We photograph the places you cannot get to, so the conversation afterwards is about evidence.
We separate urgent from optional
Some things must be settled first — moisture, wiring, an exhaust duct going nowhere. Some things can wait a year without consequence. You should know which is which.
You get a written scope before anything is installed
Sequence, materials, what is excluded and why, and what could change once we open something up.
We protect the house, then do the work
Floor coverings, dust containment, and clean access. Occupied homes stay liveable while we are in them.
We document and hand over
Photographs of the finished condition, notes on what we left alone, and anything worth watching over the next winter.
Two tools
Useful before you speak to anybody.
Both of these are free, neither asks for contact details until the end, and neither pretends to know things it cannot know from a web form.
Home Comfort Scope Planner
Six short steps that turn scattered observations into an organised preliminary scope: a likely starting area, a secondary area worth reviewing, anything that should be settled first, and the questions worth asking whichever contractor you call.
Not a diagnosis. Not a quote. Roughly five minutes.
Open the planner →Comfort & Heating Savings Estimator
Enter what you spend on heating, or what you spend on energy overall, and see a deliberately broad savings range with every assumption visible and adjustable. If the range looks wide, that is the honest answer.
Educational estimate. Not an audit, quote or rebate determination.
Open the estimator →Evidence
Ten houses, ten different answers.
Our project map is organised by neighbourhood, era and symptom rather than by product. Two of the ten entries describe work we recommended against, which is the part we would want to read if we were the ones hiring.
What people say
Four things homeowners tell us, in their own words.
Collected after project closeout. The ones we keep are the ones that describe the process, because that is the part we can actually control.
“They were the first company to explain why adding more insulation without dealing with the attic openings would leave part of the problem in place. The scope made sense before we signed anything.”
“We expected a sales pitch for the entire basement. Instead, they separated the rim-joist work from the moisture issue and told us what needed another specialist first.”
“The photos and notes were incredibly helpful. We could see the uneven insulation, the blocked soffit area and the finished result without climbing into the attic.”
“The upstairs did not suddenly become perfect, but it became much more consistent. The honest expectations were as valuable as the work.”
Where we stop
The part most contractors leave off the website.
Latchline pauses or refers work when it encounters suspected hazardous materials, active moisture, unsafe wiring, pest contamination, structural concerns or anything else outside our scope.
That is not a liability line. It is the most common reason a Latchline visit ends without a sale. An attic with a bathroom fan discharging into it does not need insulation this month; it needs the duct fixed. Insulation installed over an unresolved problem hides the problem and makes the next person's job harder and more expensive.
We would rather tell you that in the first hour than in the third invoice.
Start with what you have noticed.
The Scope Planner takes about five minutes and gives you something useful whether or not you ever call us. If you would rather just talk, the fifteen-minute Fit Check is free.