Hello all,
I have a 3600 sq. ft.roof, 4/12 pitch, with 26 ga. standing seam Kynar 500 coating. I used Tamko TW metal and tile underlayment. Roof has a 2ft. overhang with perforated vinyl soffit every 4ft.
The builder did not install any ridge vent or roof vents. He said because he left a 2" opening at the peak of the decking that the attic air would breath out through the underlayment and the z-metal. The opening does have underlayment over it.
I am about to insulate the attic and am now discovering conflicting evidence of the need for roof venting, hence my asking the experts.
Should I cut into the roof and install passive vents? If so what brand/style would you recommend? How about a thermo controlled power roof vent?
Thank you for any suggestions.
Respectfully,
Jeff
ps. I used all light gauge steel framing in the house.
Guest User
2012-05-05 17:07:37.000000
2600 sq.ft. Heated with 1000 - 3 car garage. Garage will be be insulated walls and ceiling and Will add hvac mini - split later. The soffits are ventilated every 4 ft.
In you opinion, if roof vent needed what type passive is best for this type roofing?
Thank you
Jeff
Guest User
2012-05-07 13:00:20.000000
Does that entail just removing the ridge cap an fitting a ridge vent to the z-metal. Any suggested brand or model number that might work?
Looks like I'm doing this myself. Builder is no longer in business. What is a good type or brand of passive type vent.
Thank you,
Jeff
Guest User
2012-05-07 19:57:12.000000
Is the bulk of the building living space? Do you have any intake vents in the soffits?
Todd Miller
2012-05-05 17:38:00.000000
I would suggest opening up the ridge and making sure that you have a functioning ridge vent.
Todd Miller
2012-05-07 13:04:48.000000
Your installer is incorrect.
The roof will not effectively breathe through the underlayment as it should. That area should have been left uncovered and have a ridge cap installed.
Either remove the existing cap and cut back the underlayment or put in roof vents.
Eric Novotny
2012-05-06 09:20:59.000000
If the plywood was cut back along the ridge line already, that should cover it.
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