complete guide to trimline vent requirements & installation · 1-800-438-2920 • 705...

1-800-438-2920 • 705 Pennsylvania Avenue, Minneapolis, MN 55426 • Visit our web site: www.trimline-products.com

Complete Guide to Trimline® Vent

Requirements & Installation

Determining Your Ventilation NeedsThese charts represent the minimum length of Trimline® vents, in combination with soffit ventilation, requiredto properly ventilate your attic space. Determine the square footage of the attic space by multiplying length xwidth of the house. Find that approximate square footage on the chart and read across. The chart will tell youhow much net free area is required at the ridge, the minimum feet of Trimline® Ridge Vent and the minimumsquare inches net free area of soffit ventilation required.

These charts utilize the F.H.A. standard for static ventilation as found in H.U.D. Requirements for ProperVentilation – Ref: M.P.S. 403.3. They use the 1:300 ratio (1 sq. ft. of ventilation for every 300 sq. ft. of atticspace). Trimline numbers are rounded to the nearest foot.

The numbers in these charts reflect the minimum lineal footage of slot which should be cut into the ridge.For the most aesthetically pleasing roof line possible, we recommend installing Trimline® Ridge Vent alongthe entire ridge and hips of the roof.

Attic Ventilation Applications

* Double these numbers when using the 1/150 ratio.

Low Profile Ventilation Table 1/300 Ratio*

For 5/8" thick Trimline® Ridge Vents (13 square inches net free area per foot)

Attic Sq Ft

10001100120013001400150016001700180019002000210022002300240025002600270028002900300031003200330034003500

Sq Inches at Ridge

240264288312336360384408432456480504528552576600624648672696720744768792816840

Min Ft of Vent

1820222426283031333537394142444648505254555759616365

Min Sq Inchof Soffit

240264288312336360384408432456480504528552576600624648672696720744768792816840

High Profile Ventilation Table 1/300 Ratio*

For 1" thick Trimline® Ridge Vents (19 square inches net free area per foot)

Attic Sq Ft

10001100120013001400150016001700180019002000210022002300240025002600270028002900300031003200330034003500

Sq Inches at Ridge

240264288312336360384408432456480504528552576600624648672696720744768792816840

Min Ft of Vent

1314151618192021232425272829303233343537383940424344

Min Sq Inchof Soffit

240264288312336360384408432456480504528552576600624648672696720744768792816840


Trimline® Applications

*These products do not have StormStop® membrane. For use with products without StormStop®, Trimline® offers an optional wind deflector. In areas of high wind accompanied by rainor snow, installation of the wind deflector is recommended to prevent moisture infiltration. Manufactured from aluminum, this baffle will not rust, and, if desired, may be painted tomatch the color of the shingles or trim of the house. Please call for installation instructions.

**Hip applications are recommended only when using Rigid Roll® Plus and Rigid Vent Plus™ products with StormStop® membrane.

APPLICATION: See Details A, D, E, F and GSHINGLES – Ridge, Hip**, Double Ridge Beam, Single Ridge Beam, Off Peak, and Clerestory (Shed) roof designs using any standard Asphalt Shingle

TRIMLINE® PRODUCTS:LOW PROFILE 11" RIGID VENT PLUS™ WITH STORMSTOP®

5/8" H x 11-1/4" W x 4'L 12 - 4' pieces = 48' per carton Net Free Area = 13 sq. in. per lineal ft.LOW PROFILE 11" RIGID VENT™*

5/8" H x 11-1/4" W x 4'L 12 - 4' pieces = 48' per carton Net Free Area = 13 sq. in. per lineal ft.RIGID ROLL® 11" PLUS WITH STORMSTOP®

5/8" H x 11-1/4" W x 20' L 36 rolls per pallet Net Free Area = 13 sq. in. per lineal ft.RIGID ROLL® 11"*

5/8" H x 11-1/4" W x 20' L 36 rolls per pallet Net Free Area = 13 sq. in. per lineal ft.HIGH PROFILE 11" RIGID VENT PLUS™ WITH STORMSTOP®

1" H x 11-1/4" W x 4'L 12 - 4' pieces = 48' per carton Net Free Area = 19 sq. in. per lineal ft.HIGH PROFILE 11" RIGID VENT™*

1" H x 11-1/4" W x 4'L 12 - 4' pieces = 48' per carton Net Free Area = 19 sq. in. per lineal ft.HIGH PROFILE 11" RIGID VENT™*

1" H x 11-1/4" W x 8'L 6 - 8' pieces = 48' per carton Net Free Area = 19 sq. in. per lineal ft.

APPLICATION: See Details A, B, C and GSHINGLES – Ridge, Hip**, and Clerestory (Shed) roof designs using Dimensional or Heavy Weight cap shingles.CONCRETE SHAKE or FLAT TILE – Ridge Roof and Hip** designsCEDAR SHAKE – Ridge Roof and Hip** designs


5/8" H x 9" W x 4' L 12 - 4' pieces = 48' per carton Net Free Area = 13 sq. in. per lineal ft.LOW PROFILE 9" RIGID VENT™*

5/8" H x 9" W x 4' L 12 - 4' pieces = 48' per carton Net Free Area = 13 sq. in. per lineal ft.RIGID ROLL® 9" PLUS WITH STORMSTOP®

5/8" H x 9" W x 20' L 45 rolls per pallet Net Free Area = 13 sq. in. per lineal ft.RIGID ROLL® 9"*

5/8" H x 9" W x 20' L 45 rolls per pallet Net Free Area = 13 sq. in. per lineal ft.HIGH PROFILE 9" RIGID VENT PLUS™ WITH STORMSTOP®

1" H x 9" W x 4'L 12 - 4' pieces = 48' per carton Net Free Area = 19 sq. in. per lineal ft.HIGH PROFILE 9" RIGID VENT™*

1" H x 9" W x 4' L 12 - 4' pieces = 48' per carton Net Free Area = 19 sq. in. per lineal ft.

APPLICATION: See Details A and CSHINGLES – Ridge and Hip** roof designs using enhanced ridge caps i.e. Z-glass, Z-RidgeCEDAR SHAKE – Ridge Roof and Hip** designs


5/8" H x 7" W x 4' L 12 - 4' pieces = 48' per carton Net Free Area = 13 sq. in. per lineal ft.LOW PROFILE 7" RIGID VENT™*

5/8" H x 7" W x 4' L 12 - 4' pieces = 48' per carton Net Free Area = 13 sq. in. per lineal ft.RIGID ROLL® 7" PLUS WITH STORMSTOP®

5/8" H x 7" W x 20' L 54 rolls per pallet Net Free Area = 13 sq. in. per lineal ft.RIGID ROLL® 7"*

5/8" H x 7" W x 20' L 54 rolls per pallet Net Free Area = 13 sq. in. per lineal ft.

APPLICATION: See Details H and ISTANDARD to WIDE OVERHANGNARROW to ZERO OVERHANG

TRIMLINE® PRODUCTS:SOFFIT VENT

1" H x 1-1/2" W x 4' L 24 - 4' pieces = 96 lineal ft. per carton Net Free Area = 9.5 sq. in. per foot

APPLICATION: See Details Metal VentFoam Closure and Z-Closure

TRIMLINE® PRODUCTS:METAL VENT

5/8" H x 3" W x 8' L 15-8' pieces = 120' per carton Net Free Area = 13 sq. in. per foot

Note: Install with continuous soffit ventilation at each eave.

Low profile – min. 6.5" NFA per lineal foot at each eave. High profile – min. 9.5" NFA per lineal foot at each eave.

Pitch Considerations: Trimline Shingle-Over Ridge Vents can be installed and willperform as stated in all literature on pitches from 2/12 to 20/12.

Fastening: Trimline vents can be secured by using pneumatic nail or staple tools. Ifstaples are used, the crown should be a minimum width of 1".

StormStop®

ShingleTrimline® Ridge Vent Plus™

Exhaust Exhaust

Truss

Decking

MarriageBeamsMin.

3/4"Opening

Min.3/4"

Opening

airflow

airflow airflow

airflow

airflow

Detail E

Double Ridge BeamDetail F

Off Peak Application – Exhaust or Intake

Ridge Vent Installations

airflow


Detail A

Asphalt Shingle ApplicationDetail B

Flat Tile

NailMust penetrate roof deck

1/2" or per local bldg. code

Nail

Shingles

StormStop™

Trimline Ridge Vent PlusSealant

Underlayment

Shingles

Sealant

3/4" Slot

Roof Sheathing

Underlayment

Underlayment

airflow

StormStop™

8-1/4" wide ventVent Detail

11-1/4" wide vent

Cut here

Notes: Install with continuous soffit ventilation at each eave. Low profile – min. 6.5" NFA per lineal foot at each eave. High profile – min. 9.5" NFA per lineal foot at each eave.


Note: Full installation instructions in Installation section.

Low Profile Vent offers6.5” NFA in this application.

High Profile Vent offers 9.5” NFA in this application.

Off Peak Vent can beused at upper end ofroof for exhaust or lowerend of roof for intakewhen eave or soffit ventsare not available. (Check

local building codes.)

Slot Width

Low Profile (13" NFA)3-1/2" min. opening

High Profile (19" NFA)4" min. opening



Trimline® Ridge Vent Plus™Low Profile - 5/8" highHigh Profile - 1" high

Slot Width

Low Profile (13" NFA)2" min. opening (Truss Install)

3-1/2" min. opening (Center Beam)and

High Profile (19" NFA)2-1/2" min. opening (Truss Install)

4" min. opening (Center Beam)


StormStop® StormStop®

StormStop®

Trimline® Ridge Vent Plus™

StormStop®



airflow

Detail C

Cedar Shakes & Shingles

StormStop®

Trimline® Ridge Vent Plus™

Exhaust Exhaust

Shingle

Decking

Min.3/4"

Opening

Min.3/4"

Opening

airflow

airflow

airflow

airflow

airflow

Truss

CenterBeam

Detail D

Single Ridge Beam



Pitch Considerations: Trimline Shingle-Over Ridge Vents can be installed and will performas stated in all literature on pitches from 2/12 to 20/12.

Fastening: Trimline vents can be secured by using pneumatic nail or staple tools. If staplesare used, the crown should be a minimum width of 1".


Detail G

Clerestory (Shed) Roof

Detail INarrow OverhangSoffit Application

Detail HWide OverhangSoffit Application

Soffit Vent Installation


Note: Trimline VentStrip provides 9.5"of NFA per linealfoot.



If narrower Trimline vent widths are used, the lower flashing leg must be adjusted to length.

Note: Trimline VentStrip provides 9.5"of NFA per linealfoot.



Slot Width

Low Profile (13" NFA)2" min. opening (Truss Install)

3-1/2" min. opening (Center Beam)

High Profile (19" NFA)2-1/2" min. opening (Truss Install)

4" min. opening (Center Beam)

StormStop™

8-1/4" wide ventVent Detail

11-1/4" wide vent

Cut here

StormStop®

StormStop®

StormStop®

TRIMLINE® RIGIDROLL®, RIGID ROLL®

PLUS AND LOW PROFILESAVAILABLE IN

7", 9" AND 11-1/4" WIDTHS

20' RIGID ROLL®, RIGID ROLL® PLUS AND 4' LENGTHS

TRIMLINE® RIDGEVENTS HIGHPROFILESAVAILABLE IN

9" AND 11-1/4" WIDTHS4' AND 8' FOLD-OUT LENGTHS

TRIMLINE®

VENTILATION STRIPAVAILABLE IN

4' LENGTHS

A

B

C

End Views


Foam Closure Application Z-Closure Application

airflowai

rflo

w

Metal Vent Application

Notes: Install with continuous soffit ventilation at the eave. A min. of 6.5" NFA per lineal foot at each eave.

Slot Width1-1/2" min. opening for

Trimline Metal Vent(13" NFA - 6-1/2" each side)

Slot Width1-1/2" min. opening for

Trimline Metal Vent(13" NFA - 6-1/2" each side)

Ridge Vent Installation Instructions

Ridge Preparation for Trimline® Ridge Vent InstallationThe amount of ventilation is controlled by the length of slot cut along the roof ridge. Remember, for a very attractive roof line, it is recommended that Trimline® RidgeVents are installed along the entire ridge of the roof.

1. Ridge Ventilation Slot PreparationThe slot may be precut on a new roof before or after shingle installation or ina retrofit, the slot can be cut from the pre-shingled roof using a circular sawwith a carbide tip blade. (Protective eye goggles should be worn during thisprocess). For Trimline low profile vents, cut a 2" slot (1" on each side of ridge)along the ridge(s). For a roof with a center beam, a 31⁄2" slot should be cut(13⁄4" on each side of ridge). For Trimline high profile vents, cut a 2 1/2" slot (11/4" on each side ridge). For center beam applications a 4" slot should becut (2" on each side of ridge). A minimum of 6" must be left uncut on eachend of the ridge. Once the slot is cut and any overlapping shingles coveringthe ridge are trimmed and removed, the ridge is ready for vent installation.

2. Vent Placement on RidgeRoll out or place Trimline® vent along the entire length of slot also covering the6" minimum uncut ridge on both ends. When using Rigid Roll® products, secureat the lead edge, inserting the end cap. Pull the vent tight and secure at about10 feet. Pull the rest of the vent tight and secure, inserting the end cap. Multiplelengths of vent can be joined by butting the sections tightly together. Productswith StormStop® should have an end cap inserted at the end of each section.(See Step #3). Because of the popularity of dimensional roofing material such asthe newer 40/50 year and lifetime laminated shingles we require that a bead ofsealant be applied to the roof shingles, before installing the vent on the ridge.This sealant should fill any voids between the bottom of the vent and the surfaceof the shingle. Use either; butyl sealant conforming to ASTM C1085; latexsealant conforming to ASTM C834; silicone sealant complying with ASTM C920or asphalt roofing cement complying with ASTM D4586.

3. End Cap InstallationInstall end caps. Pull apart a precut section of the foam end cap found withthe vent. For products with StormStop,® using a utility knife, make a cut inthe StormStop® material 1⁄2" on each side, back from the end of the section.(See illustration #3 inset). Using construction adhesive or sealant caulk, coatboth sides of the StormStop® material where it has been cut back at the endof the vent. Insert the foam end cap with the cut back StormStop® materialbetween the foam end cap and the underside of the vent to assure aweather tight seal. Attach vent to the roof deck by driving a nail in each ofthe two corners on both ends of the vent. Also, drive two nails through thevent and foam end cap to hold foam in place on the ends of the ridge only.Nails should penetrate the wood roof deck at least 1⁄2 inch: It is notrecommended to nail vent to ridge prior to cap shingle installation.

Note: For “Class A” Installation Only (see Fig. 3-B)For “Class A” Trimline® vent installation, followsteps 1, 2, 3 as stated above. Once the vent hasbeen installed, use a utility knife with a hook bladeand remove the corrugated plastic center section ofthe vent (see Fig. 3-B). Do this for the Hip andRidge. This modified installation meets therequirements for UL790 “Class A”, standardinstallation meets the requirements for UL790“Class A.” Follow remaining steps 4, 5, 6 as stated.

4. Cap Shingle InstallationUsing One-Pass™ Installation secure cap shingles and vent at the same time.Nail ridge caps with roofing nails in a common overlapping pattern. Nailsshould penetrate the wood roof deck at least 1⁄2 inch. For the fastestinstallation, a coil nail gun can be used as long as the minimum penetrationis 1⁄2 inch. It is important when installing this vent that you maintain the pitchof the roof. The vent has been installed properly if the bottom of the vent isflat on the roof and the peak is slightly rounded.

21

34


Trimline® Ridge Vents with StormStop® have been rigorously tested underextreme weather conditions to ensure no moisture infiltration.

— Passed the snow simulation at 70 mph — with no infiltration— Passed the test of 8.8" of rain per hour at 110 mph wind“Class A” UL 790

3-B

Sealant


Hip Vent Installation Instructions

*Hip applications are recommended only when using Rigid Roll® Plus andRigid Vent Plus™ products with StormStop® membrane.

1. Hip and Ridge Ventilation Slot PreparationDetermine how long of a hip and ridge ventilation slot will be requiredaccording to 1/300 rule (see label or technical information for correctnumbers). The ridge and hip ventilation slot may be pre-cut on a new roofbefore or after shingle installation or in a retrofit, the slot can be cut from thepre-shingled roof using a circular saw with a carbide tip blade. (Protectiveeye goggles should be worn during this process). Start ridge ventilation slot6" from point where hip and ridge meet. For Trimline low profile vents, cut a2" slot (1" on each side of ridge) along the ridge(s). For a roof with a centerbeam, a 31⁄2" slot should be cut (13⁄4" on each side of ridge). For Trimline highprofile vents, cut a 21⁄2" slot (11⁄4 on each side of ridge). For center beamapplications a 4" slot should be cut (2" on each side of ridge). If entire ridgerequires ventilation, stop ventilation slot 6" from point where hip and ridgemeet. To maintain structural integrity, one continuous slot is notrecommended on hip applications. Start ventilation preparation by leaving6" of hip uncut from where the ridge and hip meet. Cut a 31⁄2" width slot forventilation. Hip slot should be 18" in length, spaced with a 12" uncut areabetween each 18" opening. The slot for ventilation should not be cutany lower than the top 1⁄3 of the roof to maintain a balanced

2. Vent Placement on RidgeRoll out or place Trimline® vent along the entire length of slot also covering the6" minimum uncut ridge on both ends. When using Rigid Roll® products, secureat the lead edge, inserting the end cap. Pull the vent tight and secure at about10 feet. Pull the rest of the vent tight and secure, inserting the end cap. Multiplelengths of vent can be joined by butting the sections tightly together. Productswith StormStop® should have an end cap inserted at the end of each section.(See Step #3). Because of the popularity of dimensional roofing material suchas the newer 40/50 year and lifetime laminated shingles we require that a beadof sealant be applied to the roof shingles, before installing the vent on the ridge.This sealant should fill any voids between the bottom of the vent and thesurface of the shingle. Use either; butyl sealant conforming to ASTM C1085;latex sealant conforming to ASTM C834; silicone sealant complying with ASTMC920 or asphalt roofing cement complying with ASTM D4586.

3. End Cap InstallationInstall end caps. Pull apart a precut section of the foam end cap found withthe vent. For products with StormStop,® using a utility knife, make a cut in theStormStop® material 1⁄2" on each side, back from the end of the section. (Seeillustration #3 inset). Using construction adhesive or sealant caulk, coat bothsides of the StormStop® material where it has been cut back at the end of thevent. Insert the foam end cap with the cut back StormStop® material betweenthe foam end cap and the underside of the vent to assure a weather tightseal. Attach vent to the roof deck by driving a nail in each of the two cornerson both ends of the vent. Also, drive two nails through the vent and foam endcap to hold foam in place on the ends of the ridge only. Nails shouldpenetrate the wood roof deck at least 1⁄2 inch: It is not recommended to nailvent to ridge prior to cap shingle installation.

Note: For “Class A” Installation Only (see Fig. 3-B)For “Class A” Trimline® vent installation, follow steps1, 2, 3 as stated above. Once the vent has beeninstalled, use a utility knife with a hook blade andremove the corrugated plastic center section of thevent (see Fig. 3-B). Do this for the Hip and Ridge.This modified installation meets the requirements forUL790 “Class A”, standard installation meets therequirements for UL790 “Class C.” Follow remainingsteps 4, 5, 6 as stated.

21

3

6"

18"

4. Vent Placement on HipInstall a minimum of 2 cap shingles at the bottom of the hip. If the vent isnot being run the entire length of the hip, the vent should overlap a minimumof 2 cap shingles at the end of the vent. Before installing the vent on the hip,lay a bead of sealant on each side of the pre-cut slots. This will create a sealon the step created by overlapping pattern of the shingles. The bead ofsealant should be applied approximately 1" from the edge of the pre-cut slot.

4

Sealant or Caulk

“Class A” UL 7903-B

12"

18"


Hip Vent Installation Instructions

5. Hip and Ridge Vent TransitionUsing a utility knife, trim the end of Trimline® vent from the hip to the ridge.This creates the most attractive ridge and hip line. Insert the foam end capunder the Trimline® vent where it is at full width. Fasten vent for hip at pointwhere it meets ridge. Roll out or place the vent all of the way down the hip,covering 2 pre-laid cap shingles at the bottom of the hip. Go back over hipvents and fasten at 4" intervals. *If the Trimline® vent is not being run theentire length of the hip, use the cap shingles to create a transition. Usesealant to fill any void left between the shingles and the remaining top layerof the vent. Be sure to apply roofing sealant to any spaces left by capshingle used for transition. If 2 or more sections of Trimline® vent are beingjoined together, an end cap MUST be installed into each end of the joiningsections. (See illustration #3 for end cap installation). Repeat on all hips.

6. Cap Shingle InstallationApply the cap shingles to the hip and then to the ridge. Nail hip and ridgecaps with roofing nails in a common overlapping pattern. Nails shouldpenetrate the wood roof deck at least 1⁄2". For fastest installation, a coil nailgun can be used as long as the minimum 1⁄2" penetration into the deck ismaintained. It is important when installing this vent that you maintain thepitch of the roof. The vent has been installed properly if the bottom of thevent is flat on the roof and the peak is slightly rounded.

5 6

1 Vent Preparation

11 1/4” Wide Vent

Peel MembraneFrom One Side

Remove 3” Sectionof Non-Attached Vent

Off Peak Vent Installation Instructions

1. VentPreparationUsing 11-1/4"Trimline Rigid RollPlus, peelStormStop®

membrane awayfrom the bottom of3" corrugated airreturn along theentire one side ofthe vent. Using autility knife, cut offthe 3" corrugatedair return that wasattached to theStormStop®

Membrane.

2 Ridge Exhaust

3

Caulk Edge

Caulk Edge

2. Ridge Exhaust/Lower IntakeCut a horizontal 3⁄4" slot in the deck where the desired ventilation is needed. A minimum of 6" must be left uncut on each end of the slot. Install feltunderlayment per shingle manufacturer’s instructions onto the deck, installingpast cut slot. Trim felt from slot opening. Caulk edge of felt.

3. Shingle InstallationInstall shingles per manufacturer’s installation instructions, past slot. Caulk thetop edge of shingles. Trim shingles from slot opening.

Lower Intake

Above application is a guideline only. Specific application may requiremodifications. Check local building codes. Follow shingle manufacturer’sinstallation instructions. See Trimline Warranty for limitations and conditions.


4Trim to Fit

Install FoamEndcaps at End of Roofand where Rigid Roll Joins

4. Trimline Rigid Roll Plus InstallationInstall Trimline Rigid Roll® Plus along the slot opening with the remaining 3"corrugated air return placed approximately 1" below the ventilation slot. Tackdown the lead edge of the roll through the 3" air return. Then tack in themiddle and the other end of the vent through 3" air return. Be sure theStormStop® membrane is pulled tight and lay a bead of caulk, 4-1/2" up thedeck from the slot, between the roof deck and the StormStop® membranethe entire length of the slot. Nail through the modified plastic cap andStormStop® membrane into the deck. Install foam end caps.

6. Tabs RemovalUsing a utility knife, remove tabs from shingles. Nail starter course ofshingles per manufacturer’s installation instructions. Nails should penetratethe wood roof deck at least a 1⁄2". Lay a bead of caulk on the front edge ofthe starter course.

5. CaulkingLay a bead of caulk on front edge of Trimline Rigid Roll® Plus.Caulk on topand behind vent. Install felt underlayment on top of Rigid Roll product (aminimum of 15"). Lap felt from the vent to the ridge. Lay a bead of caulk onfront edge of felt underlayment.

7. Shingle InstallationInstall a minimum of one course of shingles, lapped on top of starter course,over vent. Install remaining shingles per manufacturer’s installationinstructions.

Note: Trimline Rigid Roll® Plus will provide 6.5 sq. in. of NFA per lineal footper side of the roof in this application. Trimline Ridge Vents, when properlyinstalled, meet or exceed the requirements of all recognized national buildingcodes for ventilation.

Caulk EdgeCaulk On Top& Behind Vent

Install FeltCaulk Front Edge ofFelt Underlayment

Install Shingles

Off Peak Vent

Above application is a guideline only. Specific application may requiremodifications. Check local building codes. Follow shingle manufacturer’sinstallation instructions. See Trimline Warranty for limitations and conditions.

Remove TabsFrom Shingles

5

6 7

Off Peak Vent Installation Instructions


A Balanced System

The Key to Proper Attic VentilationThe most important factor in roof ventilation is the need for a “balanced system”. This means for every inchof air exhausted, it must be balanced by providing the same or greater amount of air intake at the eaves.

Providing a balanced system assures that damaging heat and moisture is being vented out of the attic,protecting the roof from premature deterioration, costly repairs and wasted utility dollars. If an attic has aproperly balanced system, the airflow will move from the bottom of the attic to the top, pushing out heat andmoisture in a natural flow using air pressure, thermal effect and diffusion. If the system were to beunbalanced, and the Net Free Area (NFA) at the ridge is higher than at the eave, a reverse airflow can occurcausing an opposite effect to what is desired. The airflow will come from the top of the house and pushdown toward the eaves. As a result, heat and moisture are not allowed to escape and additional air andmoisture can be drawn into the home.

Recognized by builders throughout the industry, is the FHA standard for static ventilation, as found in HUDrequirements for proper ventilation. These requirements call for a ratio of 1:300. This means one square footof ventilation for every 300 square feet of attic. In addition, specifications for good attic ventilation require abalanced system – at least 50% of the vents at the eave and 50% at the upper portion of the roof. (In caseswhere a 50:50 balance cannot be achieved, always provide more than 50% of the ventilation at the eave).

When used with the correct combination of soffit vents, Trimline® Ridge Vents offer an efficient means toachieve a balanced ventilation system.

StormStop®Trimline® Ridge Vent

Trimline® Offers a Full Line ofQuality Ventilation Products.

20' Rigid Roll® 8' Fold-Out 4' Section

7" wide ■ ■

9" wide ■ ■ ■

111⁄4" wide ■ ■ ■ ■

* Lifetime manufacturer warranty

** NFA=net free area/square inches per lineal foot

Rigid Roll® and Rigid Vent™

Shingle-Over Ridge Vents*

20' Rigid Roll® 8' Fold-Out 4' Section

7" wide ■ ■ ■

9" wide ■ ■ ■ ■

111⁄4" wide ■ ■ ■ ■ ■

* 30-year manufacturer warranty

** NFA=net free area/square inches per lineal foot

■ Low Profile(5/8" thick – 13" NFA)**

■ High Profile(1" thick – 19" NFA)**

Soffit Ventilation11⁄2" x 1" x 48"24 pieces/box

91⁄2" NFA** NFA=net free area/square inches per lineal foot

Flow-Thru™ Battensfor long-term tile roof performance

3⁄4" x 11⁄2" x 96" (8' fold-out)12 pieces/bundle

Metal Vent3" x 5⁄8" x 96" (8' fold-out)

15 pieces/box13" NFA*

* NFA=net free area/square inches per lineal foot when applied to both sides of the ridge

Rigid Roll® Plus and Rigid Vent Plus™

Shingle-Over Ridge Vents*■ Low Profile

(5/8" thick – 13" NFA)**■ High Profile

(1" thick – 19" NFA)**

1-800-438-2920 • 705 Pennsylvania Avenue, Minneapolis, MN 55426 • Visit our web site: www.trimline-products.com 10/0625-20-300

©2006 Trimline Building Products

Trimline® products are covered by one or more of the following U.S.Patents: 6,357,193; 5,651,734; 5,934,995; 5,947,817; RE37,388;5,331,783; 5,094,041; 5,946,868; 6,267,668; 6,458,029; 6,599,184;6,450,882; 6,623,354; 6,913,530; 4,803,813; 5,304,095; Australiapatent 739730; Canadian Pats. 2,222,912; 2,233,271; 2355,878; anddomestic and international patents pending. See ICC-ES LegacyReport 21-85 (BOCA); NOA No. 02-0129.05 Miami Dade County,Florida, Expiration Date: 10/31/07; ICBO ES ER-5417 Legacy Report.

Trimline® Ridge Vents, when properly installed with soffit or eavevents, meet or exceed the requirements of all recognized nationalbuilding codes for ventilation. Trimline® Ridge Vents were testedand passed all tests for weather infiltration. Testing wasperformed at Architectural Testing Incorporated (ATI) in York, PA.

complete guide to trimline vent requirements & installation · 1-800-438-2920 • 705...

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