A few dollars of plastic that decides whether your insulation stays dry.
Blow sixteen inches of insulation into an attic and the material at the perimeter pushes straight into the eaves, sealing the soffit vents shut. A baffle is a channel stapled between the rafters that holds a clear path from the soffit up into the open attic, so the eaves keep breathing once the material is deep.
They cost very little and they are the difference between insulation that performs for thirty years and insulation that grows mould in its third winter. Most of the attic mould we are called to remove in Toronto traces back to an insulation job done without them.
Baffles are pointless in a rafter bay with no soffit vent under it, and they are not a fix for a roof with no intake at all — that needs vents cut. We check what is actually there before quoting a count.
In many attics yes, by working from the walkway and pushing material back from the eaves. Where the perimeter is packed solid it has to be pulled back first.
One per rafter bay that has a soffit vent below it. We count them on the inspection.
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You get the depth, the tier, the dollar figure and the photographs, whether or not you go ahead with us.
