Skylight Sizing - Windows and Doors - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Windows and Doors


Thread Tools Display Modes
Old 08-02-2013, 12:26 AM   #1
Join Date: Aug 2013
Posts: 3
Rewards Points: 10

Skylight sizing


I will be getting a new roof and also looking into getting new skylights in the process. The skylights I want to change have an outter curb dimension of 39" x 39". They are acrylic dome (non operable) and I want to swap them out for glass operable ones.

I am looking into getting the solar skylights by Velux, so that I can get the tax credit, however they do not make them in 39 x39. I was only able to see 37.5 x37.5. According to the dealer I spoke to they do not make custom sized glass operable skylights.

question is how would I get this smaller skylight to fit onto the exising curb? is it possible or should I not even bother. since I am replacing the roof anyway would it be ideal to replace the existing curb with a smaller one?

Thanks in advance for your help.


menacersf is offline   Reply With Quote
Old 08-02-2013, 05:37 AM   #2
Join Date: Nov 2011
Location: Hartfield VA
Posts: 34,587
Rewards Points: 14,306

If I was going to do it I would want to change out the whole thing, curb and all.
Almost every time I've had to work around those cheap plastic domes they have been leaking and there's sheathing damage at least.
Does this happen to be on a mobile home? The reason I ask is I often see those type sky lights used on them.
If so some other things to look for and may need addressing is thin sheathing and just craft paper used instead of tar paper, no drip edging.


When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
joecaption is offline   Reply With Quote
Old 08-02-2013, 06:12 PM   #3
Join Date: Aug 2013
Posts: 3
Rewards Points: 10

The skylight that I am looking to get says that it has a "Max skylight clearance" of 38 9/16 x 38 9/16. what does this mean in regards to my existing outter curb of 39" x 39"?
menacersf is offline   Reply With Quote
Old 08-02-2013, 06:14 PM   #4
Join Date: Aug 2013
Posts: 3
Rewards Points: 10

is making a new curb a big deal for the roofer to do? what is a reasonable fee for a having to install a new curb given that the roof is going to be redone anyway.
menacersf is offline   Reply With Quote
Old 08-02-2013, 06:23 PM   #5
Too Short? Cut it Again!
Join Date: Sep 2009
Posts: 9,634
Rewards Points: 2,000

Seems to me reframing for the new skylight dimensions, if the roof structure is exposed anyhow is a fairly minimal job? It should not cost you too much to cut lumber for a proper sized opening? Everything here starts at $10,000 though so get some bids local to you. I should think a few pieces of 2x whatever, come hangers and nails and a couple hours work could be much less where you are. But where are you? You might want to update you profile with basic geographic information.

Make sure you talk about flashing again around a working/opening glass skylight.

You might be surprised at how much stress you place on your roofing system when you cannot get them open. The high end ones are not so bad but you will learn cuss words you never knew you could utter dealing with lower end, working skylights. Total misnomer in my opinion.

Last edited by user1007; 08-02-2013 at 06:29 PM.
user1007 is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Replacing a curb mounted skylight. Red Robin Windows and Doors 2 07-25-2013 07:50 PM
Moldy Skylight cbzdel General DIY Discussions 11 03-14-2013 06:14 PM
Bath exhaust fan in skylight? Daler HVAC 3 11-23-2012 06:31 PM
Curb-mount for skylight: 2 replace or not 2 replace? 5tudent Roofing/Siding 8 10-22-2012 08:27 PM
Dome skylight leaking AAK Roofing/Siding 1 10-08-2010 05:47 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1