A few years ago, I found a small colony of bats living in the gable vent of
The bats could make their way into the attic through small holes where the
was stapled to the wood vent.
After they left for the season, I took out the gable vent, attached
screening to the
outside, and made it impossible to get back in. This seems to have worked
I'm about to have my house vinyl sided and I'm thinking of having the gable
closed up with plywood and siding over it. I really do want to deal with
or other critters getting in.
My house is 12 years old. I have soffit vents, ridge vent, and a power temp
roof vent (I had that put in when I had central air installed).
Many/most of the similiar homes in my neighborhood do not have gable vents.
it sound like I have adequate ventilation in the attic if I remove the gable
There is no gable vent on the opposite gable (chimney on that side).
You will not know if the venting was needed unless you do calculations
on what you need . Even then overventing is better. I hope you do not
run the power vent in winter or much in summer. They do pull up and out
On Tue, 14 Dec 2004 15:09:49 -0600, email@example.com (m Ransley)
this is usually the case when the fan is over sized for the attic
inlet air flow. But a very good point that should be known by anyone
that is thinking about installing an attic powered vent system.
tom @ www.FreelancingProjects.com
The power vent only runs in the summer. I forget what I have the
thermostat set to, but it is pretty high.
Since I was one of the very few people in my neighborhood to
ask the builder to put the gable vent in in the first place
(heck...my dad has one...of course I want one!), I thought
that it may have been overkill in the first place. As you
mention, I'm sure it is better to overvent, I just don't want
to deal with bats again.
m Ransley wrote:
I would keep the gable vent. It is easy to keep varmits out of the attic,
but difficult to add a vent once you cover it.. A sturdy 1/4 inch galv.
screen hand-stapled to the interior is what you want. Don't use the tiny
staple gun staples, but the 3/4 - 1" galv. staples. If you have hot summers,
keep the vent, in any case.
On 12/14/2004 5:23 PM US(ET), Roger took fingers to keys, and typed the
I didn't have bats, but I did have many paper wasp nests between the
louvers and standard window screen that was tacked to the 2x4 box frame
around the square vent. I wanted to keep flying insects from entering my
attic, but I had left too much room between the louvers and screen (3-1/2").
They didn't get in any further than the screen, but there were so many
nests that they might interfere with ventilation. I wanted to install a
thermostatically controlled power vent, so before installing it, I just
removed the screen and about 20 nests, and then moved the screen to lay
flush against the inside of the louvers, and secured it with pieces of
lath stapled to the sides of the 2x4s.
The problem is, the gable vent is directly above my side door.
When the bats were up in the gable vent, the bat guano would
fall directly on the stairs to the side door. That is how
I found out about them in the first place. Your suggestion
would definitely keep them from entering the attic, but I
also need to keep them out of the front louvres all together.
From reading your post and others, it probably would be a
good idea to keep the vent and try to think of a creative
way of blocking there entrance.
Rich, I live and work in the northeast. We have lots of bats in suburban NY
and in my work I'm in attics several times a week and have been for over
thirty years. Only twice have I seen bats. It seems to me they prefer wooden
gable vents as opposed to metal ones also. I just wouldn't make the decision
based on bats.Just wait until you find snakes in ceilings, which I've seen
more than bats in attics
Snakes in the ceiling!! I hope my wife isn't reading this thread.
Everytime the house makes a settling noise she'll be screaming
her head off and telling my to buy a pet mongoose!
Thanks for the info. The new gable vent will definitely not be
made of wood, so maybe that will make the difference.
If you have a continuous ridge vent across the roof and good soffit
venting, there is no reason you can't eliminate the gable vent. In
fact, there is debate over whether having gable vents with ridge vents
actually makes things worse. Some are of the opinion that the gable
vents allow a short circuting effect, where air enters from the gable
and exits throught the ridge vent, rather than allowing air to
circulate all the way up from the soffit vents to better cool the
attic. Plus, if you calculate the square footage of the gable vent, it
should be small compared to the area of the ridge vent. And finally,
you have a power vent as backup, with of course, the same potential
short circuiting issue. I'd make sure the soffits are sufficient for
the rating of the fan to avoid sucking conditioned air out of the house.
You bring up a good point. I never thought about the short circuiting
affect. My central air installer recommend installing the power
vent on the roof (about 1/2 way up the side of the roof). Considering
I have a ridge vent, am I doing more harm than good by having
the power vent?
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.