Quick verdict
A 48 inch by 10 foot roll of polyethylene bubble sandwiched between two layers of aluminium foil, with 70 self-adhesive pads for fixing it. Foil reflects about 95 percent of radiant heat, so on a north wall in winter it bounces warmth back into the greenhouse and in summer it blocks sun on a hot wall or window. It is thin, so it is a radiant barrier rather than true insulation, and the maker rates it B2 for fire. Cheap, light and easy to cut.
Strengths
- Reflects up to 95 percent of radiant heat per the maker
- Double foil faces work for winter heat retention or summer sun blocking
- Cuts with scissors and fixes with the 70 included adhesive pads
- Lightweight and reusable season to season
- Also lines cold frames, coops and shed walls
Weaknesses
- Thin bubble layer adds little conductive insulation on its own
- Blocks light, so only for non-glazed walls or night covers
- Adhesive pads fail on dusty or damp surfaces
The overall YardToolLab Score is out of 100. Section scores are out of 10.
Keeping Heat Where the Plants Are
A greenhouse loses heat all night through every surface, and the north wall gives nothing back because no sun comes through it. Lining that wall with a reflective barrier bounces radiant heat from the soil and plants back inside. MRPAPA’s roll is 48 inches by 10 feet of polyethylene bubble faced with aluminium foil on both sides, supplied with 70 self-adhesive pads, and the maker rates its reflectivity at 95 percent and its fire performance at B2.
This review is based on the listing specifications and on how foil bubble radiant barriers perform generally. We have not installed this roll ourselves and the brand is a generic importer.
Radiant Barrier, Not Insulation
The distinction matters. Foil stops heat that travels as radiation, which is a large share of what a greenhouse loses to a clear night sky. The thin bubble layer does little against conduction through the material. So this roll works where radiant loss dominates, on a north wall or as a night cover, and it is not a replacement for foam board or double glazing. Used for what it is, it is effective and cheap.
Where to Use It
In winter, line the north wall and north roof slope, foil facing in; those surfaces admit no useful light, so you lose nothing. Line cold frames and cloches on the north side the same way. In summer, hang it on a west-facing window or a shed wall to reflect sun. Owners also use it behind radiators, on garage doors and in campers for the same reason.
Installation
It cuts with scissors and weighs almost nothing. The adhesive pads hold on clean, dry metal and plastic frames. On timber, dusty surfaces or anywhere damp, use staples, clips or screws with washers; adhesive pads let go in a humid greenhouse by spring. Overlap seams and tape them with foil tape for a continuous surface.
Care
Wipe dust off the foil each season; a dirty surface reflects less. Roll it up for storage rather than folding, which cracks the foil along the creases.
Who Should Buy It
- Greenhouse owners wanting to hold a few degrees overnight on a budget.
- Cold frame and chicken coop owners lining north walls.
- Anyone blocking summer sun on a hot window or wall.
Common Owner Complaints
Pads that fall off and disappointment when it does not insulate like foam. Mechanical fixings and realistic expectations answer both.
Alternatives to Consider
Horticultural bubble wrap on the glazing adds real insulation while passing light. Reflectix is the branded equivalent at higher cost per foot. Foam board on the north wall insulates far better where you can afford the thickness.
Verdict
For reflecting heat back into a greenhouse from the surfaces that never see sun, this roll is an inexpensive, light and effective radiant barrier. Fix it mechanically, keep it clean and pair it with glazing insulation for a greenhouse that holds warmth through cold nights.
Full specifications
MRPAPA Double Reflective Foil Bubble Insulation Roll, 48 Inch x 10 Foot FAQs
On the north wall and north roof slope, where no useful sun enters, foil side in. It reflects heat radiating from the ground and plants back inside at night and costs no growing light.
No. Its value is reflecting radiant heat; the bubble layer adds only a little resistance to conduction. Pair it with bubble wrap glazing or foam for real insulation.
Yes. On a west window or a hot shed wall it reflects sun and keeps the space cooler.
The adhesive pads work on clean dry metal or plastic. On wood or dusty surfaces use staples, screws with washers or clips instead.
