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Adding a Skylight
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Determine the interior location where you want the skylight added.
- Make
sure there are no pipes, wires or duct work running through the
attic in this location.
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Locate and measure the distance between the ceiling joists, where
intend to place the skylight.
- The
ceiling joists are usually 16” apart, which means your sky light can
not exceed this measurement in both
width and length. It's not recommended cutting the ceiling joists or
the rafters.
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Measure the skylight top section that will be getting installed on
the roof and get in the attic directly above
where the hole will be cut in the ceiling and measure directly above
this in between the trusses making not of
all four corner measurements.
- Drop
a plumb bob down from each corner and adjust the roof section to
line up in straight lines with the
ceiling section, adjust as needed.
- Once
all corners are determined drill holes in the corner marks in both
the roof and in the ceiling, try to make
one set of corners fall directly next to a ceiling joist and roof
trust. So you have some thing to nail one side to.
- Place
wires through the holes for easy identifying once on the roof and
inside, mark from corner to corner
and double check with the actual sky light section, then proceed to
cut along these marked and measured
lines using a saw saw for both the roof and ceiling, remove the
shingles from this area on the roof so you
are only cutting the sheathing.
- Once
the holes have been cut you’ll now need to support the skylights by
framing the sides that don’t have
support, simply add 2x4’s along these areas nailing them to the
ceiling joists and to the trusses.
-On the
roof you’ll need to add a frame to go around the hole you cut in the
sheathing measure the skylight rim
frame that will overlap the skylight frame and flashing this will
give you the correct frame size to go by.
- Make
the frame so the skylight rim will fit tight around it, the frame
will consist of pieces of 2x4 or 2x6 nailed
together at the four corners and nailed to the sheathing, the tight
fit is important, it will prevent rain from
being able to enter when it gets extremely windy and rainy.
- Test
to make sure that the skylight fits tight around the frame.
Note: This next step must be done and
completed with in a few hrs on a sunny day!!
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You’ll need to match the existing roof color, always get extra
shingles, if you’re not sure.
-Running short of material late in the day not allowing you to get
more could be disastrous if not completed
and it should happen to rain.
- Be
sure to apply the correct felt 15 lb or 30 lb, it must get
folded up the side of the frame and cut off even
with the top or 1/8” below it, be sure to tuck the felt up under all
existing shingles that you will be tying into.
-Note
the existing shingles will need to be cut back evenly and staggered
so the seams don’t over lap each
other.
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Remove all nails from the existing shingles where the new shingles
will be added, the new shingles will need
to get tucked up under and butted up next to the existing ones.
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Proper over lapping and under tucking is critical where tying in the
new roof with the old roof.
- Start
at the lowest point below the frame and place the new shingle next
to the existing shingle, nailing it
with 4 big headed roofing nails 11/4" long in 4 locations at
each end and spaced evenly in between.
- Be
sure to nail right on the nail line it is located about 5 6/8" above
the bottom of the shingle, you want to nail
through this nail line and just catch the top of the 2nd course of
shingles below the course your nailing. This
will prevent any shingles from getting blown off in high winds,
always apply mastic caulking to the existing
shingles that have been pried up breaking the self adhering glue
tabs.
- Apply
the bottom saddle, nailing it in place be sure the saddle does not
extend up past the frame and it
does not sit down to low, the skylight rim will need to overlap the
saddle 1-3 inches.
- Add
the step shingles one course at a time and then add the top saddle,
the top saddle must over lap the side
step shingles and least 2” on each side, and the top of it must be
tucked up under a course of shingles or
roofed around with the new shingles and then tucking the new
shingles up under the existing course
of shingles.
- Make
sure the flashing/saddles and step shingles get over lapped by the
skylight rim at least 1-3”.
- Screw
the skylight to the frame securely not allowing it to blow off in a
storm. Caulk these screw holes.
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Call Toll Free!
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1-888-524-3464 |
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1-888-5-BIDING |
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