Roof Insulation Foil Up Or Down

We bought a bubble type of insulation.

Roof insulation foil up or down.

Due to the varying nature of the construction of buildings each property may require a slightly different approach when installing insulation on the roof. Foil insulation underlayment is recommended under a metal roof and in most cases the shiny side should be facing up but there s a catch. The foil layer of the osb lowers the delta t because the foil is low emitting and does not emit or absorb heat. Does that side go up towards the metal or down towards the ceiling.

Foil insulation is a radiant barrier and it works by. You must ensure the attic ventilation is not blocked. Kim asks on your show you said that when insulating under a floor the paper facing should face up against the flooring. Foil down usually mostly to help prevent excess radiation of the installers.

Foil insulation is worth considering if you have restricted space in your loft or roof space that means regular insulation is not viable. You must leave at least a 1 airspace between the bubble insulation and the fiberglass insulation below. One side has a reflective foil layer on it. The paper facing should always face toward the inside of the home.

They should be installed with the foil side facing into the attic adjacent to an open air space. What is the right insulation for an attic. For clean foil it doesn t really matter which way it goes. Air migrates from warmer spaces toward colder spaces and insulation is designed to help prevent or at least slow that migration.

I have a question about insulation under a metal roof. Why can t i install it the other way regardless of whether insulation is installed in a wall attic or crawlspace. In the above states you can staple the foil double bubble insulation directly to the roof decking instead of installing to the underside of the rafters as indicated above. If dust accumulates on the foil surface it will render the radiant barrier less efficient.

Shiny aluminium foil is highly reflective and it has very low radiance so the effect is very similar whichever way it is installed. The roof we are installing is aluzinc painted white.