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For initial installation and to attach support posts to either side of the opening to be protected, have a hammer drill ready to drill the necessary holes for the expanding mounting bolts.
When installing planks in advance of a flood, use our included Allen wrench to tighten down planks and to secure the upper locking plate.
The lower Hammerhead™ flood plank has rubber EPDM seal, which creates a strong seal with the ground below. Some consideration should be given to uneven ground surfaces as the plank is inflexible and while there is some flexibility to the EPDM seal, the ground should be patched and relatively level to achieve a good seal off.
In situations where there are pavers in sand, gravel, or dirt as a subsurface, it is important to add a concrete footer underneath the Hammerhead bottom rail to ensure a good seal.
This footer should extend across the entire width of the barrier, including the U-Channel Posts.
The footer should be positioned right up against your structure, to ensure a good connection and seal off. If the footer is being placed between two property walls, make sure that it is positioned to abut these walls to create a secure seal.
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The Hammerhead™ flood barrier can be extended using center posts for additional support.
We recommend planks up to 10ft for lower heights (3.28ft or 5 planks) and generally suggest using center posts for lengths longer than that.
Depending on the height of the barrier being installed, we may recommend an additional support buttress against the center post, or positioned at the middle of the planks.
Depending on your specific scenario, you can install the posts either on the inside or the outside of the opening to be protected. We tend to prefer outside installations, as the wall behind the post offers additional support, but if your wall is durable, there is no problem installing the panels inside the opening, using our expanding anchoring bolts.
Note that the inside mounting method will narrow the opening slightly (about 4 inches on either side) and as such may not be as well suited for narrow doorways. Whichever mounting method you choose, confirm that the planks will clear any hinges, molding, or door hardware.
If you aren’t sure, us at with an image of your opening and we can offer our suggestions
Typically, posts are permanently attached to the opening once installed. Prior to installation of the planks, we recommend checking the bolts are secure and the post is seals well to the wall.
Installing the Hammerhead™ flood log system permanently, ensures that a good seal is created, as we recommend that you apply silicon to the sides of the installed posts to enhance the seal.
It is possible to install posts using standard drop in masonry anchors, which allow for removable center posts but we generally do not recommend this method for standard post mounting.
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