We originally sealed this house for bats back in 2005 and they had a "new" roof put on so once again they are having issues with bats getting under the ridge vent. Construction is multiple hip roofs over the 3000ft + structure.




I've never seen this type of ridge vent installation before. I did a close up of it for better viewing but it is installed this way over all of the ridges and slopes. It looks like bent trim coil and although the picture doesn't show it, there is cobra vent sitting on top of the material with the singles finishing it off. From the inside, you can see up into the vent area making me wonder if they put it over the old ridge vents and just did a layer of shingles although I can't find evidence of a bottom line of shingles on the edges.

I don't want to put a bid in for this project until I understand the construction method used to make sure I can guarantee it. It's simple enough to seal the gaps between the material and the shingles, but without knowing how the cobra vent or shingles are secured I'm hoping to hear from others that have worked with it.

yep... looking at the ridge there is nails that are not seated,,,,,,, t/o,,,r/d//////

I Just finished evicted a batchler colony last week,,,,, they started a tear off today....lolo

Some of the ridge vent systems used today pose an immediate or near future bat infestation problem due to their design, poor installation and as a result of the irregular roof line it is installed upon.Screwing down the system in key positions would eliminate most of this problem if done correctly.

It appears that this ridge venting system looks like others however it looks as though they have added a flashing strip on the bottom edges to facilitate runoff. I dont know if this was that particular contractors method of adding this flashing as an after market bit of insurance to the install, or if it was actually part of the original factory install kit.

You could attempt to find the contractor who did the work to speak with him and see if he has some of this ridge system components to view in hand to evaluate a cross section for determination.

There is really only two ways to go with such a problem. One could do a complete removal and screen the gap and secure a good GAW wire grid over the entire void area and reattach the vent cover system. Or inspect every inch of both sides of the ridge. Then seal or secure it once again with screws/washers and seal over the secured attachment hardware after the eviction process. The second method would be successful only if the integrity of the original installed system is unflawed in its design and composition.

I have done some interior ridge screening in years past but it is a pain to install screening between each roof joist and to make sure you have a tight staple seal install. This method can still allow external roosting upon the installed screen barrier under the ridge vent cap system but guano filtration can and will still accumulate on the attic floor under the bat roosting areas but the bats will be kept out.

Huh. That's a new one for me. Never seen a vented hip; also never saw a base of metal put down under Cobra Vent (it's a brand name). Old ridge vents were metal, but those had slots down the sides. Wonder if it's a DIY job - but for 3K square feet?

Is it a zinc strip put on to prevent algae? If so, it should have been put under the last row of shingles, not the ridge vent.