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Table of Contents
Why should I
buy a F. J. Moore Mfg. Co. plumbing vent flange?
How does a
F. J. Moore Plumbing Vent Flange work?
Why is a Rubber
Seal flange inferior to our Cover-All flange?
Are
F. J. Moore
plumbing vent flanges worth the cost?
Are F. J. Moore plumbing
vent flanges
difficult to install?
How do I measure
the inside dimension of a pipe?
How do I
determine whether to order a slanted/sloped roof flange or a
steep/high-pitched roof flange?
How is the color
applied to the Pre-Painted Roof Flanges?
Can I order roof
flanges that I don’t see listed in the FJMooreMfg.com catalog pages?
How do I install
an F. J. Moore Manufacturing roof vent?
What is the CVV
Code on a Credit Card?
Why has the price on a product changed since I last visited the FJMooreMfg.com
Web Site?
Why should I buy a
F. J. Moore Mfg. Co. plumbing vent flange?
Answer
The F. J.
Moore,
2-part roof mounted plumbing vent flange, is unique. Our Cover-All
vent flange encloses the entire plumbing pipe above the roof. We
don’t rely on a rubber seal to prevent water entering the attic.
Patented in 1924, our plumbing vent design has been virtually
unchanged for 80 years and is still the best choice. The Galvanized
and Pre-Painted products, with lead tops, are usually good for the
life of the roof.
Install it once.
It should last 30 years or more and has no rubber seal to wear out
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How does a
F. J. Moore Plumbing Vent Flange work?
Answer
The F. J.
Moore
plumbing vent flange is easy to install and is adjustable to the
pitch of the roof. The Base of the flange is set to the roofs
pitch. The Base rotates under a row of shingles and provides water
drainage. The Top Cylinder of the flange telescopes over the Base
Cylinder and attaches to the pipe opening with a malleable preformed
lead seal. As the roof expands and contracts, the Base rises and
the Top stays stationary. This allows for roof movement without
compromising the seal.
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Why is a Rubber
Seal flange inferior to our Cover-All flange?
Answer
A Rubber Seal will
dry out and become brittle when exposed to the effects of sun and
time. Roofs expand and contract as the sun heats the attic air.
This causes the rubber seal, on the vent flange, to slide up and
down on the vent pipe. As the rubber seal ages, movement of the
roof can cause the rubber seal to crack. A cracked rubber seal can
allow moisture to enter the attic. Most new homes use some type of
rubber seal flange around the vent pipes. The rubber seal-type
flange is less expensive than our Cover-All flange. Most rubber
seal type flanges crack or split prior to replacing the original
roof. In our home market (Minnesota and the surrounding states),
most re-roofs use the F. J. Moore Cover-All flange. Since 2000, we
have sold over 650,000 Cover-All flanges.
NOTE: F. J.
Moore
also makes a rubber seal flange, but we do not guarantee them, for
the above reasons.
Return to Top
Are
F. J. Moore
plumbing vent flanges worth the cost?
Answer
The F. J.
Moore
Cover-All flange costs about twice as much as most rubber seal
flanges. This means you will pay approximately $10-$20 more per
roof, if you need 2 roof vent flanges. F. J. Moore guarantees 10
years of performance, virtually all Cover-All flanges last 30
years. Our Pre-Painted products cost $20-$25 more, due to higher
material cost. The Pre-Painted Cover-All flange eliminates the look
of the white plumbing pipes rising out of the roof. The Pre-Painted
colors blend into the shingles to provide a uniform look.
Looks better.
Lasts Longer. Will not leak. Costs $20-$50 more per $10,000+ roof
replacement – or about 0.2%-0.5% of the total cost. Are they worth
it? YES!
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Are F. J. Moore plumbing
vent flanges difficult
to install?
Answer
The F. J.
Moore
plumbing vent flange is easy to install. If you or your contractor
can install any other type of plumbing vent flange, you can install
ours. See our Install instructions on our Web site.
Return to Top
How do I
measure the inside dimension of a pipe?
Answer
Take a good,
precise ruler, preferably a metal one, and measure the inside
dimension of the top of your plumbing pipe that extends through your
roof.
Place your ruler across the diameter of the pipe. Start your
measurement from the inside edge of one side of the pipe and note
the number of inches at the opposite inside edge of the pipe. You may have to remove the current top and/or vent flange to
do this,
in order to measure accurately. All standard residential
plumbing is a standard 1½”, 2”,
3”, or 4".
F. J. Moore
Manufacturing does not stock 1½” inside dimension flanges. If you
require a roof flange for 1½” inside dimension pipe, please select
Custom Order under Reference at
Contact Us, fill it
out, and submit the form to us.
Return to Top
How do I determine
whether to order a slanted/sloped roof flange or a
steep/high-pitched roof flange?
Answer
The pitch of the
roof is determined by 2 factors:
-
The vertical
height of the roof (RISE)
-
The
horizontal length of the roof (RUN)
The formula is:
RISE (in feet) x 12 /
RUN (in feet) = X (Pitch of roof)
Example: If the
RISE is 15’, and the
RUN is 30’, the pitch would be 6 (15 x 12 / 30
= 6)
The Pitch of the
roof is expressed as a fraction, divisible by 12. So if the pitch
is determined to be 6, this would be expressed as a pitch of 6/12.
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