Butyl tape:
Securely bonds to even resistant surfaces
It is less temperature-sensitive and oozes less in high temperatures
It can be applied in a wide range of weather conditions - very flexible
It is more affordable than acrylic or silicone in most instances
Provides an effective barrier that is airtight and watertight
Flows better around decking screws and deck fasteners, creating a tighter seal.
However, no adhesive is perfect. Butyl tape and butyl sealant also have cons:
Because it is solvent-based, it can dissolve if exposed to strong solvents such as gasoline, turpentine, or mineral oil
It does not adhere well if the surface is very rough
Though it has improved, it can be affected by extreme temperatures
Butyl tape is best used during construction. However, if a sealant is needed after construction, such as around a window frame, you may need caulk or other material that works like caulking.
A deck's substructure, its beams, and joists can start to rot around 8 to 10 years, even with treated lumber. Therefore, ensure your deck's substructure lasts as long as the deck boards it supports with butyl tape.
Water leakage through your decking boards can cause hidden damage unless your beams and joists are covered. Even tiny cracks around screws and can lead to wood rot. For a small cost, you can protect your deck substructure by applying flashing tape. We can waterproof the tops of the deck joists, rim joists, beams, and the ledger board. It will hold water out and help seal around screw holes and metal fasteners to prevent corrosion.
