Do you need an air gap for foil insulation?

You MUST have an air gap in order to get either the emissivity quality or the reflectivity quality that you’re looking for, otherwise the foil will not work as a radiant barrier.

Is reflective insulation good for attic?

As a huge source of energy loss in homes, the attic is a great place to start. And reflective or foil insulation (like radiant barrier) is a great material to use.

Which way do you install reflective insulation?

The foil insulation goes on top of the moisture barrier, followed by the roof covering. If you use bubble foil or rigid foam insulation, it also goes on top of the moisture barrier. Remember that there has to be an air space between the foil and the roofing.

Do you need an air gap for loft insulation?

Whatever form the insulation takes, it is vital that there is an air gap of at least 5cm between the face of the insulation and the roof covering. To avoid condensation problems, this space must be well ventilated so vents may need to be installed in the roof and at the eaves and ridge.

Why is an air gap required when installing a radiant barrier?

So, without an air space, you cannot have radiant heat. Without radiant heat there is no way to have a “Radiant Barrier”. In fact, because of the conductive nature of pure aluminum, if you install radiant barrier foil WITHOUT the required air space it will actually work AGAINST you and INCREASE Heat flow.

Does reflective insulation keep cold out?

Works to keep warm air in during the winter and solar radiant heat out during the summer. Prevents up to 97% of solar radiation. Improves energy efficiency and lowers utility costs, especially if HVAC and duct systems are located in the attic.

Is reflective insulation better than fiberglass?

The U.S. Department of Energy reports that reflective insulation is the most effective at preventing downward heat flow, making it a better choice for roof insulation where keeping heat out is the most important factor.

Which way should the foil face?

See full disclosure. Since aluminum foil has a shiny side and a dull side, many cooking resources say that when cooking foods wrapped or covered with aluminum foil, the shiny side should be down, facing the food, and the dull side up.

Where do you put foil backed insulation?

Foil-faced insulation can use in a wide range for commercial and residential applications:

  1. Exterior wall,
  2. Roof,
  3. Ceiling applications (like in cathedral ceilings – frequently required for use in ceilings without attics)

Does a radiant barrier need air space?

Does foil in the attic work?

Radiant barriers are more effective in hot climates than in cool climates, especially when cooling air ducts are located in the attic. Some studies show that radiant barriers can reduce cooling costs 5% to 10% when used in a warm, sunny climate.

https://www.youtube.com/watch?v=qT_tDdvT1vo