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Operating temperature: -22°F to +176°F (-30°C to +80°C)
Applicable sill plates: KPK-N140U for sill plate of 2x6.

Installation environment

Concrete

Foundation

Concrete

Foundation

Concrete Foundation

Concrete Foundation

Floor Level

Floor Level

Crawl Space

Crawl Space

Install the Airtight Joto-Vent by placing them closely, end-to-end, on top of the foundation 
where there is NOT to be ventilation (illustrated in examples (1) and (2) below).

Installation Method

(1) Foundation that requires no ventilation 
     (stepped foundation: above the floor level)

(2) Foundation surrounding a concrete slab, 
     such as a garage or porch

Airtight Joto-Vent

Airtight Joto-Vent

Joto-Vent

Joto-Vent

Airtight Joto-Vent

Airtight Joto-Vent

Ground 
Level

Ground 
Level

Joto-Vent

Joto-Vent

release sheet

release sheet

Airtight Joto-Vent

Airtight Joto-Vent

Installation procedures (Straight section)

Installation procedures (Corner Section)

3

2

• Avoid storage under very high or very low temperatures. Do not store the 

products outdoors. Doing so may lead to deformation of the products.

• Do not apply heat to the products and avoid unnecessary shock or impact 

on the products.

• Make sure to choose the correct products matching the foundation dimensions.
• Make sure the finished top of the foundation is flat and smooth for proper 

installation. Rough or uneven top surface of the foundation may deteriorate 
air sealing.

• Do not remove or dispose of the black foam material attached to the product.
• The product has a top side and a bottom side. It can be rotated, but not 

flipped. Install the products with the “

Joto

” mark facing up.

CAUTION

• Wear appropriate protective gear such as gloves, hard hats, and protective 

glasses while at work. Use appropriate cutting tools. Never use 
inappropriate tools for cutting purpose such as sander to cut by friction. 
Properly handle the tools per manufacturers' operations manual.

• Provide necessary personnel and equipment to ensure safety transportation 

of the products.

• Do not throw or drop the products. Do not step on the products or put 

anything on them. Doing so may lead to personal injury or property 
damages.

• Be careful about sharp corners and edges of the products.
• Never burn, eat, or let children play with the products. Doing so may lead to 

serious injury and or accidents.

WARNING

Garage

Inside

Inside

Outside

The product will lock together as shown below.

*Where necessary, the product can be cut to length.

When cutting the product, stick the supplied 
EPDM Foam Pad to the cut surface. When 
connecting products as a butt joint, cut the 
locking parts from the adjacent piece, and install 
ensuring both pieces are in close contact.

The Airtight Joto-Vent also locks together at 90-degree angles 
to be used in corners.

Use the supplied EPDM Foam Pad both on the top and below 
the corner intersection as shown below.

When cutting the product, stick the supplied 
EPDM Foam Pad to the cut surface. When 
connecting products as a butt joint, cut the 
locking parts from the adjacent piece, and install 
ensuring both pieces are in close contact.

Outside of airtight line

Outside of airtight line

EPDM Foam Pad

EPDM Foam Pad

cut the protrusion 

cut the protrusion 

Inside of airtight line

Inside of airtight line

release sheet

release sheet

Outside of airtight line

Outside of airtight line

EPDM Foam Pad

EPDM Foam Pad

EPDM Foam Pad

EPDM Foam Pad

EPDM Foam Pad

EPDM Foam Pad

Inside of airtight line

Inside of airtight line

Top side

Bottom side

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