A large share of Lethbridge's multi-unit housing serves students and short-tenure renters, and that gives the buildings something most apartment stock does not have: a predictable window when units are empty. Multi-family spray foam insulation in Lethbridge is often scheduled around that window rather than fighting occupancy.
The turnover window is the build window
Between tenancies a unit is empty, accessible and already being worked on for cleaning and repairs. That is the cheapest moment in the year to do anything that needs interior access, and it recurs on a known calendar. A building operator who plans envelope work against that cycle gets interior work done that would otherwise be treated as impossible in an occupied block.
High turnover raises the value of comfort
A building with long tenancies can carry a comfort problem for years. A building that re-lets every twelve months hears about it every twelve months, and every complaint sits in front of a prospective tenant rather than an existing one. That changes the arithmetic: the envelope is not only an operating cost, it is part of whether the unit lets easily.
An exposed block takes the full wind
Lethbridge wind does not stop at the ground floor. On a multi-storey block on open ground it drives air through every unsealed junction, and it interacts with stack effect rather than cancelling it - pressure on the windward face, suction on the leeward, and warm air leaving the top of the building throughout. Sealing is what reduces that, and no amount of added insulation substitutes for it.
The units nobody wants
Most multi-unit buildings have a handful of units that are consistently harder to let - the corner, the top floor above an unheated space, the one over the entry. Those units are almost always an envelope problem rather than a layout problem, and they are the ones where targeted work pays back fastest.
The wind is a pressure problem before it is a comfort one
On a taller building in this city the wind does something a house never has to deal with. It pressurises the windward face and pulls a vacuum on the leeward one, and in a building with a leaky envelope that difference drives air straight through the structure from one side to the other. Residents on the exposed face feel a draught they cannot find the source of, and the units on the sheltered side get the air that has already crossed the building. Sealing the envelope is what removes the path; adding insulation without sealing it does very little for this particular complaint.
Multi-family Spray Foam Insulation Lethbridge: Common Questions
When should this be scheduled? Between tenancies. In student and short-tenure housing that window is predictable, and it is the one time interior access is straightforward.
Does high turnover change the case for doing the work? It does. A building that re-lets often puts any comfort complaint in front of a prospective tenant, so the envelope affects how easily units let rather than only what they cost to heat.
Why are some units always harder to let? Usually the envelope. Corners, top floors above unheated space and units over an entry are exposed on more sides, and that is a sealing and insulation problem rather than a layout one.
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