Construction Tapes

What types of construction tapes are available?

Construction tapes are made with different adhesives and backing materials to suit particular membranes, substrates and connection points. Depending on the application, they can be used for:

• sealing joints and overlaps in wind barriers and diffusion membranes;
• sealing joints and connections in vapor control membranes;
• connecting building membranes to masonry, concrete, wood or metal;
• airtight sealing around loose-fill insulation blowing points;
• repairing localized damage to building membranes.

Why is airtightness important?

Gaps in membrane joints and connections can allow uncontrolled air movement through the building structure. Moisture carried by that air can also enter the assembly, potentially affecting the insulation and increasing the risk of moisture accumulation.

Properly sealed joints help the membrane system perform as intended and maintain the airtight layer across connections, overlaps and other potential leakage points.

How do you choose the right construction tape?

The performance of a building membrane system depends on both the membrane itself and the quality of its sealed joints and connections. Construction tape needs to maintain a durable, airtight bond with the membrane or substrate throughout the life of the assembly.

Temperature changes, structural movement and moisture can weaken that bond over time, so tape selection should account for more than its intended use. Compatibility with the surface, installation conditions and long-term performance should also be considered.

What materials can the tape bond to?

Construction tape needs to be compatible with both the membrane and the surface it will be attached to. A tape that bonds well to a smooth plastic membrane, for example, may not provide the same adhesion on rough masonry.

Manufacturers specify the membranes and substrates their adhesive tapes are designed for. Depending on the product, these can include wood, plastic, metal, concrete and masonry.

What installation conditions should be considered?

Temperature, moisture and surface condition can affect how well construction tape bonds during installation. Before applying a tape, check the manufacturer’s requirements for:

• minimum installation temperature;
• allowable substrate moisture;
• required surface preparation.

Following these requirements helps the adhesive establish a secure initial bond with the membrane or substrate.

How long should construction tape last?

A construction tape may bond well when first installed but still need to withstand years of temperature changes and exposure to moisture without losing adhesion. Choosing a tape with the right long-term performance helps prevent joints from weakening or peeling as the building ages.

For exterior applications, also check whether the tape may be temporarily exposed to UV radiation during construction and how long the manufacturer permits that exposure.

How can you check that construction tape is installed correctly?

A secure bond requires continuous contact between the tape and the surface beneath it. Wrinkles, air pockets or lifting edges can weaken the seal and increase the chance of the tape peeling away over time. After installation, check that:

• the tape adheres evenly along its entire length;
• there are no wrinkles, air pockets or other visible defects;
• the edges remain firmly bonded to the surface;
• the overlap width and installation method follow the manufacturer’s instructions.

Can installation defects be corrected?

That depends on the defect and the type of tape. Re-pressing may be sufficient for some problems caught immediately after installation, but tape that has wrinkled, lifted or failed to bond correctly may need to be removed and replaced.

Follow the manufacturer’s instructions for the specific product. Correcting problems early helps prevent a small installation defect from compromising the airtight seal.

How should construction tapes be stored?

Heat, direct sunlight and moisture can affect the adhesive before the tape is ever installed. Proper storage helps preserve its bonding properties until it is ready for use. Construction tapes should be:

• kept in their original packaging and within the manufacturer’s specified storage temperature range;
• protected from direct sunlight;
• protected from prolonged moisture, frost and excessive heat;
• used within the manufacturer’s stated storage period.