How do I stop my deck from heaving?
Andrew Henderson
Updated on April 05, 2026
How do I stop my deck from heaving?
A good drainage bed (Crushed Stone or Sand), with a tapered pier. All dug down to frost depth. That should work, a tapered pier should if built correctly resist the heaving of the soil, and with a good drainage bed below, it should be able to drain all water.
How do you control frost heave?
Tips to Prevent Frost Heave
- Think Ahead. Plan on planting perennials at least six weeks in advance of the first frost of the season to allow adequate time for root systems to become established.
- Be Vigilant. Keep a watchful eye on vulnerable plants.
- Promote Drainage.
- Insulate with Mulch.
Does frost heave go back down?
Will frost heave go away? Generally yes, if you have a smaller building or structure that has experienced frost heave, it will often settle back down close to its original position. But as quick as it drops in spring, it will lurch back up in the winter if you don’t deal with it.
How do you fix a sinking deck?
Jack up the deck, using high-lift jacks. Dig under the deck post just enough to place the deck post into the hole and release the pressure on the jacks. The post settles into the 4-by-4 hole in the footing for a permanent concrete foot that resists sinking.
How do you prevent frost heaves in sidewalks?
How to Prevent Frost Heave
- Make sure water supply lines are well below the frost line.
- Place Styrofoam sheets and a layer of crushed stone below the slab.
- Add wire screen or steel rebar for extra support.
How to fix a deck that has risen and now slopes toward house?
Widen the hole at the bottom to create a bell shape. Pour the cement footing all over again. Re-install new support posts and connect them to the beam so the deck has the right slope away from the house. That is the only long term solution. Join in and write your own page! It’s easy to do. How?
How can I fix a heaving deck on my house?
Visit your local building department and get a copy of your building code’s footer size, depth, frost line chart; Set up temporary bracing to support the area in which you plan to excavate, to evaluate your existing footer depth;
What’s the best way to fix a sinking deck?
Practice good safety and use common sense. If it’s a tough job or you aren’t comfortable with it, hire a professional. The goal is simple. You need to raise up the sinking area of the deck to make it level, then secure it with foundation support.
What should I do if I have a hole in my deck?
If your existing footer is less than the required footer depth, you need to re-pour your concrete footers, so set up temporary bracing around your entire deck; Go back to your building department and apply for a building permit to repair your footings. Why?
Widen the hole at the bottom to create a bell shape. Pour the cement footing all over again. Re-install new support posts and connect them to the beam so the deck has the right slope away from the house. That is the only long term solution. Join in and write your own page! It’s easy to do. How?
What’s the best way to repair a deck?
Repair and reinforce joists that have soft, discolored areas with rotted wood putty. Apply a thick coat of clear sealer to the damaged joist. Let it dry, and then apply a second coat of sealer. Cut a reinforcing joist from pressure-treated lumber.
What should I do about the heaving on my Deck?
This winter, however, the deck has heaved noticably! The side farthest from the cabin has heaved about 1to 2 inches up, whereas when we built the deck, it sloped about 1/2 the other direction (away from the cabin). I know the heaving will subside somewhat in the spring, but what should we do then?
What causes my deck to move up and down?
All has been good, except last winter we experienced our deck start to heave upwards quite noticeably. Then in the spring, my deck returns to normal. My husband has looked under the deck for damage, nothing out of the ordinary so far. So my question for you, what causes my deck to move up and down like that?