screws from the bottom seems a good idea but it will be hard to get up there because there are a ton of rafters up to criss crossed
I guess we could but why is it different from screws from the roof side ?
No - screws down through the flange into the plywood from above. That DAP roof sealant is good stuff, but it's meant to keep water out, not to really hold something in place. Depending on how wide the flange is you may end up putting some roofing nails through it anyways when you lay down the felt paper (ice paper) and shingles, but a few nails or flat head screws into it to hold it in place would be more then worth it.
Usually when someone says tar in reference to a roof it's what you would find as "roof cement" at your hardware store. It's good stuff and every house should have a bucket of it on hand for patching shingles, flashing, gutters, etc...
http://homeguides.sfgate.com/use-roof-cement-28831.html
I see thanks for the tips.
I though the same thing about the DAP stuff , no where on it does it say it is like a glue. SO i still need to find some caulk or glue to keep the ventilator in place, could I just use the roof tar to glue down the vent AND the shingles ? after I put them on top of the ice paper ?
Or do you recommend another glue or caulk to hold the vent down before nails then ice paper ?
thanks again
I have 1 vent like that I used 4 screws
I put down this under it
http://www.homedepot.com/p/Nashua-Tape-6-in-x-50-ft-Select-Window-and-Door-Flashing-Tape-1343003/206495170
then a thin layer of tar
then the vent with 4 screws
then the roll of flashing tape
then tar
then singles
it is more then 18 years old
3 hurricanes
winds gusted up to 95 in one of them
does not leak
I did have to replace the motor after 2 years the replacement moter is like 15-16 years old.
700 is a good price for his labor
do not worry about intake my guess is the garage is not air tight and enough air will get in.
you kind of want a low intake with a air filter on it
i will show an idea later
Thanks @philipma1957 I will grab the flashing paper and the tar and 24 screws later today , the installer gets off work at 4pm and will head here directly so I will be ready
I already ordered the low gravity intake , but I can return it if your Idea is better, I figured I could put a filter on the gravity intake after its installed
my issue with the gravity intake is simple will you add duct work in the garage so the air goes really low to the ground? if you do that it will work well.
gravity intake with an attached duct to the floor >>>>> miners >>>>>>> roof fans
the above will pull air from roof down a flex duct past a filter at the miners up to the roof
so how big is the gravity intake ?
here is a 20 inch flex duct
http://www.homedepot.com/p/Master-Flow-20-in-x-25-ft-Insulated-Flexible-Duct-R8-Silver-Jacket-F8IFD20X300/302001685?
and a 16 inch flex duct
http://www.homedepot.com/p/Speedi-Products-16-in-x-12-ft-Insulated-Flexible-Duct-with-Metalized-Jacket-R8-FD-12R8-16/203393287?
attach the flex duct here
two intakes
