What the VP88 is and what it does
The VP88 is a plastic vapour barrier — a coupe-vapeur — made to cover an insulation box in insulated ceilings. Its role is straightforward but essential: every recessed fixture you install in an insulated ceiling creates a break in the continuous vapour barrier of the building envelope. That break is where warm, moisture-laden interior air escapes into the cold cavity, where it condenses. The VP88 restores the continuity of that barrier over the insulation box, so the assembly performs the way it was designed to and complies with the National Building Code. It is a single-purpose accessory, and that is exactly why it works so well: no adapting, no fabricating, no guesswork on site.
Construction and design
Plastic construction keeps the VP88 light, easy to handle on a ladder and easy to seal against a poly ceiling membrane. It simply goes over the insulation box rather than replacing it, so it does not interfere with the fixture itself or with the box's own clearances. Because it arrives already shaped for the job, there is no measuring, no cutting sheets of poly and no taping together a makeshift cap that an inspector will question. On a project with dozens of recessed pot lights, that repeatability saves real hours and gives you a uniform, professional result across every ceiling in the building.
Installation notes
The VP88 is not an electrical device: it carries no wiring, no voltage and no connections, which makes it one of the easiest items on the job list. Position it over the insulation box in the insulated ceiling, then integrate its perimeter into the building's vapour barrier using the sealant and tape your assembly details call for, keeping the membrane continuous all around the penetration. Do this before insulation is placed back over the assembly and before the ceiling is closed in, so the barrier can be inspected. Follow the fixture manufacturer's clearance and insulation-contact instructions as well as local code and your project's building science details — the VP88 handles the vapour side of the equation, while the fixture and insulation box handle the thermal and electrical side.
Technical specifications
Brand: LUMIFARO
SKU / model: VP88 (VP-88)
Type: Vapour barrier / coupe-vapeur accessory
Material: Plastic
Function: Covers an insulation box in insulated ceilings
Code: Allows compliance with the National Building Code
Applications: Residential and commercial projects
Documentation: VP88 technical spec sheet (PDF)
Applications and documentation
Think of every ceiling in Canada that separates heated space from cold space: a bungalow's top-floor ceiling under a vented attic, a sloped cathedral ceiling in a chalet, a condo's upper unit, a basement ceiling under an unheated porch, a garage, a warehouse office, a clinic waiting room, a boutique fit-out. Wherever an insulated ceiling is pierced by a recessed fixture, the VP88 belongs there. It is equally at home on new construction, where the barrier is installed as the ceiling goes up, and on renovations where an attic is being re-insulated and every old penetration needs to be brought up to standard. For full details, the VP88 technical PDF spec sheet is available in the Documentation tab of this page — download it for your submittal package, your permit file or your site binder. Add the VP88 to your order with your recessed lighting so the whole installation is ready to pass inspection the first time.
