Recessed Lights and Attic Moisture in Camillus
There is a published leakage limit for one recessed light fitting, and a dozen older ones above your head will not be anywhere near it.
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What the code allows a single light fitting to leak
In the Town of Camillus the median year of construction is 1966. Of 11,481 housing units, 6.1 percent were built in 1939 or earlier, 9.2 percent before 1950, 69.1 percent before 1980 and 30.9 percent in 1980 or later. 78.7 percent are single-family detached and 79.4 percent of occupied units are owner occupied.
Source: US Census Bureau, American Community Survey 2020-2024 5-year estimates, tables B25034 year structure built, B25035 median year structure built, B25024 units in structure and B25003 tenure, accessed 2026-09-14
The 2025 Energy Conservation Construction Code of New York State requires recessed luminaires installed in the building thermal envelope to be sealed to limit air leakage between conditioned and unconditioned space, to be IC-rated and labeled as leaking not more than 2.0 cubic feet per minute when tested to ASTM E283 at a pressure difference of 1.57 pounds per square foot, and to be sealed with a gasket or caulk between the housing and the ceiling. Electrical and communication outlet boxes penetrating the air barrier must be sealed too.
Source: 2025 Energy Conservation Construction Code of New York State, via UpCodes, accessed 2026-09-14
The Town of Camillus has 11,481 housing units of which 78.7 percent are single-family detached, with 79.4 percent owner occupancy. 59.9 percent of the town's housing was built between 1950 and 1979 and 69.1 percent before 1980. Camillus village inside it is much older, a median build year of 1958 with 32.2 percent of its units built in 1939 or earlier and only 44.2 percent detached.
Source: US Census Bureau, American Community Survey 2020-2024 5-year estimates, tables B25034 year structure built, B25035 median year structure built, B25024 units in structure and B25003 tenure, accessed 2026-09-14
The arithmetic of a Camillus ceiling full of downlights
Ceiling lights are holes with bulbs in them. The 2025 Energy Conservation Construction Code of New York State requires recessed luminaires in the building thermal envelope to be sealed against leakage between conditioned and unconditioned space, to be IC-rated and labeled as leaking no more than 2.0 cubic feet per minute when tested to ASTM E283, and to be sealed with a gasket or caulk where the housing meets the ceiling, with outlet boxes that break the air barrier sealed too. Camillus houses have been collecting them for decades: 69.1 percent of the town's stock was built before 1980, so kitchens, bathrooms and finished spaces here have generally been relit at least once with fittings that predate that budget.
What to do about the fittings already in the ceiling
You do not necessarily have to replace them. Older housings can often be boxed and sealed from the attic side where the fitting allows it, which closes the path without touching the room below, and that is much less disruptive than relighting a kitchen. Where a fitting is not rated to be covered, the honest answer is that it either gets swapped for one that is or it stays as a known hole. Either way the value of the exercise is in counting them: twelve fittings, a bath fan, a hatch and a few wire penetrations in one ceiling is a steady column of warm damp air heading for the coldest surface in the house all winter, and each one closed is a measurable share of it.
Count the fittings above the wet area
The attic problem is usually worst directly over a kitchen or bathroom with several downlights. Counting them tells you where to start.
Ask whether they can be boxed from above
Sealing from the attic side is cheaper and less disruptive than replacing fittings, and it works where the housing allows it.
Add the small holes to the list
Outlet boxes and wire penetrations that break the air barrier are named in the same requirement. Individually trivial, collectively significant.
Tell us how many downlights are in the ceiling
And which rooms they are over. We arrange an insured contractor who counts the openings before recommending vents.
Related attic and roof work in Camillus
Attic questions from Camillus homeowners
Can I just put insulation over the light fittings?
Not unless the fitting is rated and labeled for it, and covering an unrated housing is a genuine hazard rather than a technicality. The correct route is a sealed, code-compliant enclosure or a replacement fitting that is rated for contact with insulation. Anybody willing to bury an unrated can under blown material is not somebody to have in your attic.
Is it worth doing if only the kitchen has them?
Often yes, because kitchens produce a lot of the moisture and usually have the densest run of fittings. Sealing the ceiling over one wet room can noticeably reduce what arrives at the deck. It is also the easiest area to justify, since you can see the effect on the wood directly above it the following winter.
Close the holes over your head
Send the Camillus address and what the attic looks like above the kitchen. No obligation, and this is usually a day's work.