Insulate Tin Roof Without Decking

Talking about metal roof insulation this thing is one of the most challenging things people work in this field is facing it demands and requires excellent skill and expertise which you may only get from a reputable roofing contractor.

Insulate tin roof without decking. This paper wrap is important to the health of the home by not allowing water to build up in the space between the sheathing and the metal roof. Lay insulation on paper liner one of the most common mistakes that diy homeowners make with their metal roof is that they do not lay down any type of paper wrap on the sheathing. This will provide an air space above the foam insulation to improve ventilation on the underside of the metal roofing. The problem arises with moisture.

If there is a roof leak the insulation will be damaged by the water leaving you with less insulating value. Some homeowners choose to use unfaced fiberglass insulation batts. First nail 1x2s to the rafter sides up against the roof strapping. If you choose to omit the plywood from a residential construction install a vapor barrier between the purlins and the metal roof or plan to spray closed cell foam insulation between the rafters to eliminate the temperature differential between the air in the building and the metal.

T he problem with the insulation against the sheathing expands. It is possible to insulate from below as you suggest with rigid polystyrene insulation. The moisture is held in place by the insulation which allows for damage to the framing and other building components.