How to Choose A Proper Flashing Tape

Flashing Tape

Builders have long been troubled by moisture and air penetration problems.And water penetration is one of the most important factor that will cause mold, bacterial growth, rot and other health problems.

For the problem of moisture, flashing tape became the protagonist.

This has become familiar to builders, contractors and tape makers.Thanks to the new building regulations, building flashing sealing tape has changed from an optional building material to a required building material.Flashing tape is one of the most popular sealing materials for building designers.


Now, let me introduce flashing tape to you.

What is flashing tape?

Flashing tape is a continuous, thin, impermeable material that prevents water and air from seeping into the building envelope.By sealing the joints and irregular openings, builders sealed the structure tightly, preventing water and air from penetrating, saving air-conditioning costs and improving indoor air quality.

In theory, a very good waterproof structure can solve the problem of windproof and waterproof around Windows, doors and all the holes around the wall.Especially water and air leakage on the roof.Therefore, it is very important to choose a good flashing tape in order to get a airtight and watertight structure.


Flashing Tape 

Waterproof Tape

How to choose a proper waterproof tape?


To choose a good waterproof tape, you need to consider the following tips:

UV protection

It is important to know how long a roll of tape can work under UV, especially in applications where the tape will be exposed for a long time.Sunlight degrades some tapes, and if the tape doesn't have some built in UV protection performance, the tape will become less effective over time.Many factors can affect the UV protection time of a roll of tape. If this is a critical factor for you, you need to confirm the UV protection time of the tape.


Modified asphalt tape vs. Waterproof butyl tape

Many contractors will opt for more affordable asphalt waterproof tape.But over time, it will dry out and become less waterproof.

A better one is the waterproof butyl tape, but not all butyl adhesive is the same.Most waterproof butyl tape has higher adhesive strength than modified asphalt tape. The waterproof butyl tape is also easy to install. When choosing a waterproof butyl tape, it is important to keep an eye on the temperature range.Some waterproof butyl tapes are modified to work better at low temperatures and more stable at high temperatures.


Window Flashing Tape

Cold climate

The temperature range is a very important factor when choosing tape.In general, modified asphalt is difficult to maintain in cold climates, most of which become less sticky at 50and will not stick at 40. Window Flashing butyl tape works better.

The installation

Proper installation is critical.

For better installation results, be sure to follow the manufacturer's installation instructions when installing the product.Different products may be used in different ways, but they all have the same effect.Installation techniques, application temperature, adhesion to the surface, and compatibility with the surrounding material in contact with the membrane are also important factors.

The compatibility of materials is very important.Especially for materials that are hard to paste.Choosing the right tape is as important as a good installation.

Another important factor is installation.Now, it seems that all manufacturers have a different set of installation methods which must be followed to guarantee the product's warranty.

Waterproof Tape


Roof Flashing Tape

It sounds easy, but if it's not clear, it's hard to implement.Installation standards vary from manufacturer to manufacturer, making it difficult for contractors to remember their methods.Therefore, if in doubt, follow the manufacturer's instructions. The International Residential Code (R613.1) requires that "Windows be installed and flashed in accordance with the manufacturer's instructions".If you have done so, you have completed the work required by the building code.


Unless it is specially designed high temperature adhesive tape, the general waterproof tape will begin to soften between 120 and 180. Products with special high temperature formulations can withstand temperatures above 200, but they are usually not as sticky and may be difficult to find.If the manufacturer does not specify using temperatures of the product, contact them directly to confirm the range of temperatures to be used for the product.



Surface processing

Each manufacturer specifies which products are good to paste and which require special attention.In general, solid wood, plywood, vinyl and aluminum panels are easier to paste. As long as they are clean,free of oil, dirt or dust, they can be pasted well.Some manufacturers recommend priming concrete, masonry and OSB board surfaces with concrete primer, while others recommend priming all substrates for optimum performance, especially in cold weather conditions.

Installation method:

The upper tape will always cover the lower one, so even if the adhesive fails to bond, water will naturally flow down and out of the structure.That's how materials like roof tiles and cladding work -- they drain naturally.

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