4. Rain Screens Archives - Hammer & Hand Better building through service, craft, & science. Thu, 31 Oct 2024 02:50:52 +0000 en-US hourly 1 https://wordpress.org/?v=6.8.1 https://mld8ztyau83w.i.optimole.com/w:32/h:32/q:mauto/f:best/https://hammerandhand.com/wp-content/uploads/2021/11/HH_LOGO_S_RGB_7475_f.png 4. Rain Screens Archives - Hammer & Hand 32 32 4. RAIN SCREENS https://hammerandhand.com/best-practices/4-rain-screens/ Tue, 10 Sep 2024 06:30:34 +0000 https://hammer-and-hand.local/?post_type=hh_best_practices&p=14977 Built right, rain screens are vital to modern construction in our Pacific NW climate. They are also poorly named with multiple definitions. At Hammer & Hand, when we say “rain screen” we are referring to the ventilated rain screen, with that all-important ventilated cavity between cladding and the rest of the wall assembly. That cavity […]

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Built right, rain screens are vital to modern construction in our Pacific NW climate. They are also poorly named with multiple definitions. At Hammer & Hand, when we say “rain screen” we are referring to the ventilated rain screen, with that all-important ventilated cavity between cladding and the rest of the wall assembly. That cavity serves two functions for the exterior wall assembly:

1. The cavity helps protect the wall from water intrusion. By separating the cladding from the face of the wall assembly, the rain screen cavity interrupts capillary action into the assembly and provides a drainage plane for bulk water to drain away harmlessly.

Note: we also include a WRB (water-resistive barrier) inboard of the cavity to provide a final line of defense against bulk water intrusion.

2. The cavity helps wall assemblies dry out. When ventilated properly, with a minimum 1/4” gap to the exterior at bottom and top of the rain screen and a minimum 3/8” deep vertical cavity in between, the volume of air passing through the rain screen cavity can be measured in the 10s, even 100s, of air changes per hour. This dramatically increases the assembly’s drying potential and resiliency. This is good, particularly for highly insulated walls which by design decrease airflow and thermal transfer across the assembly, reducing the assembly’s capacity to dry. The drying action of the ventilated cavity behind the rain screen helps to counteract this limitation, promoting building durability.

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4.1 RAIN SCREENS: TOP OF WALL https://hammerandhand.com/best-practices/4-1-rain-screens-top-of-wall/ Tue, 10 Sep 2024 20:35:07 +0000 https://hammer-and-hand.local/?post_type=hh_best_practices&p=14978 A. WRB (WATER-RESISTIVE BARRIER) B. FURRING C. COR-A-VENT SV-5 D. TRIM BLOCKING E. CLADDING F. TRIM When the WRB is complete and lapped correctly, the rain screen installation begins. Install vertical furring to correspond with the framing method (aligned with vertical framing members). Use untreated 1×4 furring. Attach Cor-A-Vent SV-5 insect blocker strip between furring. […]

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Rainscreens Top of Wall Detail | Hammer & Hand
A. WRB (WATER-RESISTIVE BARRIER)
B. FURRING
C. COR-A-VENT SV-5
D. TRIM BLOCKING
E. CLADDING
F. TRIM
Rainscreen Installation Detail 1 WRB | Hammer & Hand
  • When the WRB is complete and lapped correctly, the rain screen installation begins.
Rain Screens Installation Detail 2 Install Vertical Furring Strips | Hammer & Hand
  • Install vertical furring to correspond with the framing method (aligned with vertical framing members).
  • Use untreated 1×4 furring.
Rain Screen Detail 3 Attach Cor-A-Vent | Hammer & Hand
  • Attach Cor-A-Vent SV-5 insect blocker strip between furring.
Rain Screen Detail 4 Attach Siding | Hammer & Hand
  • Attach siding.
Rain Screen Detail 5 Install Blocking | Hammer & Hand
  • Install blocking to attach the rabbeted trim to.
Rain Screen Installation Detail 6 | Hammer & Hand

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4.2 RAIN SCREENS: TOP OF WINDOW https://hammerandhand.com/best-practices/4-2-rain-screens-top-of-window/ Wed, 11 Sep 2024 22:25:10 +0000 https://hammer-and-hand.local/?post_type=hh_best_practices&p=14979 A. JOINT & SEAM FILLER B. FASTFLASH C. WRB (WATER-RESISTIVE BARRIER) D. INSTALLED WINDOW E. TRIM F. HEAD FLASHING G. FURRING H. COR-A-VENT SV-5 I. CLADDING Layer on WRB. Layer in a shingle method starting at the bottom and lapping top over bottom piece. Install vertical furring to correspond with the framing method (aligned with […]

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Rain Screen Detail Top of Window | Hammer & Hand
A. JOINT & SEAM FILLER
B. FASTFLASH
C. WRB (WATER-RESISTIVE BARRIER)
D. INSTALLED WINDOW
E. TRIM
F. HEAD FLASHING
G. FURRING
H. COR-A-VENT SV-5
I. CLADDING
Rain Screen Detail 1 Layer on WRB | Hammer & Hand
  • Layer on WRB. Layer in a shingle method starting at the bottom and lapping top over bottom piece.
Rain Screen Detail 2 Install Vertical Furring Strips | Hammer & Hand
  • Install vertical furring to correspond with the framing method (aligned with vertical framing members).
  • Use untreated 1×4 furring.
Rain Screen Detail 3 Install Trim | Hammer & Hand
  • Install trim.
Rain Screen Detail 4 Attach Head Flashing | Hammer & Hand
  • Cut a slit in the WRB, fold up, and use tape to hold the flap out of the way while the head flashing is installed.
  • Attach head flashing.
Rain Screen Detail 5 Apply Joint and Seam Filler | Hammer & Hand
  • Apply Joint & Seam Filler to the top of the back leg of the head flashing.
  • Tool Joint & Seam Filler into place.
Rain Screen Detail 6 Fold WRB Flap Back Down | Hammer & Hand
  • Fold WRB flap back down and tape the slit to prevent water intrusion.
Rain Screen Detail 7 Attach Rain Screen Furring Strips Above Head Flashing | Hammer & Hand
  • Attach remaining rain screen furring above head flashing.
Rain Screen Detail 8 Install Cor-A-Vent Above Window | Hammer & Hand
  • Install Cor-A-Vent above the window.
Rain Screen Detail 9 Install Siding | Hammer & Hand
  • Complete rain screen by installing siding.

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4.3 RAIN SCREENS: BOTTOM OF WINDOW https://hammerandhand.com/best-practices/4-3-rain-screens-bottom-of-window/ Thu, 12 Sep 2024 14:13:26 +0000 https://hammer-and-hand.local/?post_type=hh_best_practices&p=14980 A. WRB (WATER-RESISTIVE BARRIER) B. TRANSITION STRIP C. SHIMS SUPPORTING WINDOW D. INSTALLED WINDOW E. FURRING F. COR-A-VENT SV-5 G. TRIM H. CLADDING Layer on WRB. Layer in a shingle method starting at the bottom and lapping top over bottom. Install vertical furring to correspond with the framing method (aligned with vertical framing members). Use […]

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Rain Screen Detail Bottom of Window | Hammer & Hand
A. WRB (WATER-RESISTIVE BARRIER)
B. TRANSITION STRIP
C. SHIMS SUPPORTING WINDOW
D. INSTALLED WINDOW
E. FURRING
F. COR-A-VENT SV-5
G. TRIM
H. CLADDING
Rain Screen Detail 1 Layer on WRB
  • Layer on WRB. Layer in a shingle method starting at the bottom and lapping top over bottom.
Rain Screen Detail 2 Install Vertical Furring Strips | Hammer & Hand
  • Install vertical furring to correspond with the framing method (aligned with vertical framing members).
  • Use untreated 1×4 furring.
Rain Screen Detail 3 Cut Pieces of Cor-A-Vent SV-5 | Hammer & Hand
  • Cut pieces of Cor-A-Vent SV-5 to fit flush in between furring below window.
Rain Screen Detail 4 Attach Trim
  • Attach trim.
  • Can be nailed to furring.
Rain Screen Detail 5 Install Siding | Hammer & Hand
  • Install siding to complete the rain screen.

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4.4 RAIN SCREENS: BOTTOM OF WALL https://hammerandhand.com/best-practices/4-4-rain-screens-bottom-of-wall/ Fri, 13 Sep 2024 20:34:31 +0000 https://hammer-and-hand.local/?post_type=hh_best_practices&p=14981 A. WRB (WATER-RESISTIVE BARRIER) B. FURRING C. COR-A-VENT SV-5 D. WATER TABLE E. FLASHING F. CLADDING Layer on WRB. Seal sheathing to stem wall with Joint & Seam filler. Install vertical furring to correspond with the framing method (aligned with vertical framing members). Use untreated 1×4 furring. Attach a continuous strip of Cor-A-Vent SV-5 insect […]

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Rain Screen Bottom of Wall Detail | Hammer& Hand
A. WRB (WATER-RESISTIVE BARRIER)
B. FURRING
C. COR-A-VENT SV-5
D. WATER TABLE
E. FLASHING
F. CLADDING
Rain Screen Detail 1 Layer on WRB | Hammer & Hand
  • Layer on WRB.
  • Seal sheathing to stem wall with Joint & Seam filler.
Rain Screen Detail 2 Install Vertical Furring Strips | Hammer & Hand
  • Install vertical furring to correspond with the framing method (aligned with vertical framing members).
  • Use untreated 1×4 furring.
Rain Screen Detail 3 Attach Strip of Cor-A-Vent SV-5 | Hammer & Hand
  • Attach a continuous strip of Cor-A-Vent SV-5 insect blocker at bottom of furring.
Rain Screen Detail 4 Attach Water Table | Hammer & Hand
  • Attach water table to furring.
Rain Screen Detail 5 Install Flashing Above Water Table | Hammer & Hand
  • Install flashing above water table.
Rain Screen Detail 6 Install Siding | Hammer & Hand
  • Install siding to complete the rain screen.

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4.5 RAIN SCREENS: GABLE END https://hammerandhand.com/best-practices/4-5-rain-screens-gable-end/ Sat, 14 Sep 2024 08:15:08 +0000 https://hammer-and-hand.local/?post_type=hh_best_practices&p=14982 A. ROOFING MATERIAL B. FLASHING C. WRB (WATER-RESISTIVE BARRIER) D. FURRING E. BLOCKING FOR RABBETED TRIM F. COR-A-VENT SV-5 G. CLADDING On Gable Ends At the sloped angle of the roof where the siding will terminate, attach small segments of furring in between full pieces. This provides support for the ends of the lap siding […]

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Rain Screen Gable End Detail | Hammer & Hand
A. ROOFING MATERIAL
B. FLASHING
C. WRB (WATER-RESISTIVE BARRIER)
D. FURRING
E. BLOCKING FOR RABBETED TRIM
F. COR-A-VENT SV-5
G. CLADDING
On Gable Ends
At the sloped angle of the roof where the siding will terminate, attach small segments of furring in between full pieces. This provides support for the ends of the lap siding where it does not meet regular furring.
Gable Ends | Best Practices Manual | Hammer & Hand

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4.6 HORIZONTAL RAIN SCREEN FURRING FOR VERTICAL SIDING https://hammerandhand.com/best-practices/4-6-horizontal-rain-screen-furring-for-vertical-siding/ Sun, 15 Sep 2024 22:31:55 +0000 https://hammer-and-hand.local/?post_type=hh_best_practices&p=14983 A. WRB (WATER-RESISTIVE BARRIER) B. VERTICAL FURRING C. HORIZONTAL FURRING D. COR-A-VENT SV-5 E. BLOCKING FOR RABBETED TRIM F. CLADDING G. TRIM H. MAINTAIN QUARTER INCH GAP Bottom of Wall Reveal A. WRB (WATER-RESISTIVE BARRIER) B. VERTICAL FURRING C. HORIZONTAL FURRING D. COR-A-VENT SV-5 E. WATER TABLE ATTACHED TO HORIZONTAL FURRING F. FLASHING FOR WATER […]

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Rain Screen Top of Wall Reveal | hammer & Hand
A. WRB (WATER-RESISTIVE BARRIER)
B. VERTICAL FURRING
C. HORIZONTAL FURRING
D. COR-A-VENT SV-5
E. BLOCKING FOR RABBETED TRIM
F. CLADDING
G. TRIM
H. MAINTAIN QUARTER INCH GAP
Bottom of Wall Reveal
Rain Screen Bottom of Wall Reveal | Hammer & Hand
A. WRB (WATER-RESISTIVE BARRIER)
B. VERTICAL FURRING
C. HORIZONTAL FURRING
D. COR-A-VENT SV-5
E. WATER TABLE ATTACHED TO HORIZONTAL FURRING
F. FLASHING FOR WATER TABLE
G. CLADDING
Rain Screen Installation Detail 1 | Hammer & Hand
  • Rain screen installation begins after the WRB is properly lapped and in place.
Rain Screen Detail 2 Install Vertical Furring Strips | Hammer & Hand
  • Install vertical furring to correspond with the framing method (aligned with vertical framing members).
  • Use untreated 1×4 furring.
Rain Screen Vertical Siding Detail 3 Install Horizontal Furring Strips | Hammer & Hand
  • Install horizontal furring to allow attachment of vertical siding.
  • Use 1×4 furring.
  • Nail on blocking for rabbeted trim, leaving space for Cor-A-Vent SV-5.
Rain Screen Vertical Siding Detail 4 | Hammer & Hand
  • Install a continuous strip of Cor-A-Vent SV-5 at top and bottom of the rain screen to prevent bug entry.
Rain Screen Detail 5 Attach Water Table | Hammer & Hand
  • Attach water table.
Rain Screen Detail 6 Install Flashing for Water Table | Hammer & Hand
  • Install flashing for water table.
Rain Screen Detail 7 Attach Vertical Siding and Trim | Hammer & Hand
  • Attach vertical siding and then trim.

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