Step 1 - Make sure surfaces are clean
Before putting material on the wall, make sure all surfaces where the SureSpan EX will be adhesively attached are clean. Remove any rust or laitance on the shelf angle, then wipe it all down with isopropyl alcohol, ensuring it is clean and ready for FastFlash.
Step 2 - Apply a bead of FastFlash on the underside of the shelf angle
Apply a bead of FastFlash on the underside of the shelf angle and then spread it out. On uneven surfaces like the ones shown in the video above, using a chip brush to spread the material out can work better than a plastic or metal spreader.
The FastFlash should be applied close to the edge of where your SureSpan EX will be, but be careful not to apply too much material. That can get messy and cause some headaches later on in the process.
Step 3 - Set the SureSpan EX into the wet sealant
Press the SureSpan EX into the wet FastFlash. In this example, to hold that SureSpan EX in place while the FastFlash cures, we use some clamps and a piece of wood. When you clamp that piece of wood down, if there is excess FastFlash that squeezes out, tool it off. Let the installation set overnight and the next day, you can remove the clamps.
This is where too much material and too messy of an installation can cause some problems. If you have ever used FastFlash before, you know that it is a very sticky material. So in this case, if any of that FastFlash is touching the edge of the wood, it will stick pretty aggressively to it and you may damage the SureSpan EX trying to remove the wood.
Step 4 - Apply FastFlash to the vertical sheathing
To attach the SureSpan EX to the sheathing on the vertical face, put a bead of FastFlash down and just as we did before, wet-set the SureSpan EX into the sealant. It's a good idea to use a small laminate roller to ensure sufficient pressure to fully set the SureSpan EX into the FastFlash.
Step 5 - Counterflash with FastFlash
Next, counterflash the edge of that transition with FastFlash. So put a bead down and spread it out. What we are looking for here is for that edge to be fully encapsulated. So make sure it is completely covered and there are no gaps.
While the FastFlash is still wet, you can still make small adjustments to the placement of the SureSpan EX, but at this point you don't want to lift it and re-set it. That may result in needing to add more FastFlash to make sure the extrusion is fully set into the wet sealant.
So now your deflection joint is protected from air and water getting in there and you can move on to other parts of the building.
Questions? We're here to answer them, Monday-Friday, 8 a.m.-5 p.m., Central Standard Time, at 1-800-255-4255.