Attic Insulation Eve Vents Blown Insulation

Batt and roll insulation and loose fill sometimes known as blown in insulation.

Attic insulation eve vents blown insulation.

Batt and roll insulation works well between joist and stud spaces or if you have a wide open space or a crawlspace. Spray polyurethane foam is a chemical product that is created by two materials isocyanate and polyol resin that will react with each other when they are mixed and will expand up to 30 to 60 times its liquid volume as it is sprayed in place. The airflow from the soffits to the ridge vent keeps the roof cool and prevents ice dams and the material will block that flow. Blocking the eve vents with the insulation is one of the most common causes of moisture problems in attics.

We offer our review of the three most popular types of attic insulation with a look at each one s pros and cons. Blown insulation may require an additional block to prevent insulation from being blown into the soffit. Vents placed in the underside of the roof s overhang or soffit provide a means for air to get into the attic to help cool it in the summer months. There are two main types of insulation.

Blown in cellulose is an environmentally friendly material made from recycled newspaper so it s easier on your skin and lungs. For the same reason insulation shouldn t touch the roof s underside. Loose fill blown in insulation is best for tight spaces or if your attic already has a layer of insulation. Covering up the soffit vents with loose fill or batts which can happen if you stuff insulation along the eaves is a huge no no.

This is especially true with loose fiber insulation that has been blown into the attic. Unfortunately blow in insulation can drift. Once they are in place you can then place the batts or blankets or blow insulation right out to the very edge of the attic floor. Cellulose blown in ceiling insulation is a good choice for diyers.

A piece of rigid foam board placed on the outer edge of the top plate works very well for this. Wind can blow up through soffit vents disturbing insulation and moving it out of place. This alternative to traditional building insulation fiberglass can be applied into wall cavities holes concrete slabs and even onto roof tiles and. Your options for attic insulation range from radiant barriers to sheets of mineral wool but most homeowners stick with products made from cellulose or fiberglass.

The insulation should extend over the top of the outer wall and stop short of the vents not touching the roof in such a way as to block air passages from the vents into the attic batts of insulation can be carefully pushed over the top of the outside walls and stopped short of the vents.