Is Your Deck Safe?


As soon as the weather warms up in Vermont, we all tend to flock to our decks to relax, socialize, barbecue and watch the gorgeous New England sunsets. But it is easy to forget the necessary maintenance that will keep your deck in top shape. If you find yourself wondering, “is my deck safe?” or “how do i know if my deck is safe?”, we at POLLI Construction, Inc. are here to help.

Read on to view our quick checklist that will help you spot any deck safety problems before they become your worst nightmare:

How To Know If Your Deck Is Safe


One of the best ways to prevent wood rot is by applying stain on an annual basis. But if it does creep into your decking or corner posts, it should be repaired right away. Not doing so can compromise the overall structural integrity making your deck dangerous. Press a screwdriver into any spot that feels soft. If it sinks in, you’ve got a problem. That’s a good time to call a professional to examine and fix it.

Learn more about Rot Repair


The metal brackets that support the decking underneath are called joist hangers. If you take a look, you will also see carriage bolts that fasten the deck to the building. Fasteners can sometimes loosen off or pull away from it. Also, corrosion of these metal fasteners and hangers will occur if the fasteners are not compatible with the wood.

Many people put rock salt on their porch in the winter to keep a path clear and avoid slipping. This will probably not affect the material. However, the salt falling through the cracks can corrode these metal brackets. Everything may look okay from above, but the fasteners may be rusting underneath. If any fasteners appear to be pulling away or corroding, you should not use the deck until it is inspected and repaired by a professional. Simpson fasteners made a great video that shows you what to look for.

Learn more about deck components


Every porch should be supported by concrete posts that sit below the frost line. In Vermont, that means a minimum of 54 inches below grade, and the addition of a concrete base footing and metal rebar throughout.

If your deck heaves every year or a concrete post looks like it is coming out of the ground at an angle, chances are your concrete was not deep enough or did not have rebar in it. Do not use the porch until it is repaired, as the support posts could slide off the concrete posts and cause it to collapse.

If the support posts are not appropriately fastened to the concrete footings, or the deck is not attached correctly to the house, this also needs to be repaired as soon as possible. Also, make sure your support posts are bolted to the frame. Sometimes these posts are just nailed in, and nails can pull out of the posts over time.


The ledger board attaches the deck to the house, and if it fails, the porch will collapse. The ledger board must be bolted into the framing of the house, and improved building codes have mandated this for new construction. Unfortunately, many decks were constructed before these codes were in place.

The best system to use is a “through bolt.” Holes are drilled into the ledger board, though the wall, and into the house. Then we insert bolts and fasten them on the inside of the wall, or attach them to blocking on the inside of the house. Doing this will prevent your porch from pulling away.

Preventative maintenance, yearly inspections and proactive repairs will allow you to enjoy your deck safely for many decades. If your deck needs repairs or you’re simply not sure, contact POLLI Construction, Inc. today for a free quote or to learn more.


11 Gregory Drive
S. Burlington, VT 05403

(802) 482-5777


If you are feeling dirty, it’s time you meet our sister company Sparkles.
For a home that is shiny and bright, call Sparkles ’cause they do it right.

May 20, 2017

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