I’m really new at all of this (that is, homebuilding and computers)..but, here goes.
I am building a house. To vent the roof I’ve installed a ridge vent and am using baffles from the eaves to the ridge. My question is about what happens to that continuous venting when you interrupt the baffle with the insertion of skylights in the roof? The skylights fit in between the rafters which are 2′ O.C. There are 3 skylights on the south side of the roof and one on the north side. Do I simply ignore the lack of venting in these rafter bays or do I somehow try to re-route the air?
Any ideas? Thanks!
Replies
Why run baffles all the way up to the ridge? Is there insulation between the rafters, and a ceiling attached to them?
If so, you might be able to drill some holes through the rafters above and below the skylight to allow the air to wander over into and out of the adjacent space. (Depending on rafter sizes and spans)
More info would help - Like what part of the country you're located in.....
Burglars broke into my place and were so appalled, they left a donation!
Thanks for the reply. I live in northcentral PA. This is the coldest winter I can remember, thank goodness I got my woodstove up and running last Thanksgiving!!Yes, the second floor of this cape cod is to be finished space, two bedrooms and a bathroom and hall. The ceiling will be finished all the way up to the ridge. The rafters are 2x10's set 2' O.C. with 9 1/2" fibreglass insulation below the baffles. (the baffles are already in place) Codes require an R-30 in the roof in our area.
I was thinking, as you suggested, of drilling holes through the rafters (maybe 3/4" or so?) right alongside of where the baffles terminate on the up and down sides of each skylight, then inserting flexible tubing from the "blocked" baffle through the rafter and into the "unblocked" baffle. How does this sound? Appreciate all input...I'm sure people have run into this alot whenever putting skylights in finished rooms in the second floor of Capes. I wonder if the skylight manufacturer ("Velux" ) has some thoughts on the matter, I'll let you know.
Drill 1 1/2" holes horizontally into the rafters below and above the skylight headers into the uninterupted rafter bays. Being that you have baffles you'll need to open them and rig another short baffle to baffle where you drill the holes to allow the flow of air to enter.
Be warm
Namaste
Andy
"Attachment is the strongest block to realization"
http://CLIFFORDRENOVATIONS.COM
Thanks, just out of curiosity I called VELUX to see what they'd say...they have no recommendations on the matter and said they didn't think it would matter if there was no venting in these bays...I found this curious, since there is so much to-do these days about venting roofs properly...thanks for your suggestion, I'll give it a try.
Hey kb,
I run into this qutie a bit and have found that yes you must vent it but the best way is to notch the top 3/4" of the rafter all the way around the opening . About a 3" slot on top works very well.
By the way..you should consider going to a 2x12 for a depth if you are using fiberglass insulation .
When they install it it has a tendency to close off the vent space in a 9 1/4" space....If you use blown in cellulose you needn't worry about the added depth or the venting.(That stuff is excellent for sound and insulative propertys)