Seal Around B Vent Attic

Sealing the ceiling so the attic insulation can work.

Seal around b vent attic.

In a future article we will be covering how to properly air seal your ducts themselves until that time and to get your attic ready for insulation i general prefer to use a fire rated foam and spray it around the opening cut into the ceiling. Three years ago i wrote an article titled don t let your attic suck power attic ventilators are a bad idea nearly a hundred thousand page views and 93 comments later it s still generating lots of heat. Some holes are apparent like attic hatches or folding attic steps. Aluminum base vent pipe flashing with adjustable rubber collar in black model 81840 15 97 15 97.

Because the pipe gets hot building codes usually require 1 inch of clearance from metal flues 2 inches from masonry chimneys to any combustible material including insulation. Insulation baffle around a b vent pipe in an attic. I don t know why so many people are so defensive about power attic ventilators but here are a few of the things they ve said to me in the comments. There are a lot of holes gaps and cracks that leak a lot of air.

Gibraltar building products 1 4 in. I promise no spamming of your email. A proper vent with insulation baffle looks more like this. The opening around a furnace or water heater flue is a major source of warm air into the attic photo 5.

One static vent style is the turbine vent which uses wind to power its enclosed fan all it takes is a light breeze to rotate the blades and suck heat out of the attic view example on the home. Duct work in the attic of what a joy. Of clearance from class b flues 2 in. The opening around a furnace or water heater flue or chimney can be a major source of warm air moving in the attic.

The roof vent pipe is installed cut through the roof and around the pipe attached to the roof is surrounded with rubber boot as insulation for the gap between the pipe and roof. Clear flexible roof sealant model 0309 ga 9 97 9 97. Because the pipe gets hot building codes require 1 in. If you enjoyed this post and would like to get notices of new posts to my blog please subscribe via email in the little box to the right.

As you note the chase on the attic floor is not as much of a problem because your basement and your attic are both inside of your thermal envelope. Before i add insulation i seal the attic. Ventilate the attic 1 sqft per 300 sqft of attic floor space balance at ridge and soffit areas. Furnace vent pipe too close to combustibles.

Set your store to see local availability add to cart. So you should certainly seal the air leaks around the chimney at this location by installing metal flashing with sealed seams around the chimney on the underside of the rafters.