You will definitely need a strong support if your mattress is foam or latex.
Best plywood for mattress support.
Using inch thick plywood is okay but ideally you should use plywood thicker than that to provide adequate support.
A tarp or a non penetrative sheet can be used to cover the plywood.
Plywood thinner than 3 4 inch should not be used as it will not be strong enough to hold the weight of a bed mattress and a person lying down.
A mattress with plywood will not give the same support as a fresh new mattress.
It s not the best solution but plywood under the mattress is a decent temporary fix.
Ditch your uncomfortable mattress for nectar s memory foam mattress with a lifetime warranty.
Hope this helps brian.
Plywood should be of the same dimensions as the mattress and the bed frame.
The thickness requirements for plywood vary depending on the type of mattress.
Mattress helper under mattress support fix your sagging mattress firmer solution for mattresses twin single side coverage king 3 6 out of 5 stars 780 zinus gulzar easy assembly quick lock 1 6 inch bunkie board bed slat replacement twin.
The plywood must be 0 75 inches thick.
Insufficient support from beneath or a breakdown in their internal support structures.
Using plywood may not allow the mattress to breathe properly and the wood can hold moisture even mold.
As i say in this particular article the 1 2 plywood or pressboard over an existing foundation works great with memory foam or latex mattresses.
All these types of mattresses need is a firm uniform bottom for proper support of the mattress.
There are many ways to make your mattress firmer.
If finished the plywood can be put on the bed frame and the mattress directly on the plywood.
The plywood can be exactly 3 4 inch thick but ideally it should be thicker.
This may require two sheets of plywood if the bed is queen size or larger.
If you do not want to throw out your box spring just yet adding a few layers of plywood will make your box spring firmer.
Most people prefer a firm mattress and rightly so.
The best mattress pads of 2020 including machine washable mattress pads cotton mattress toppers and mattress pads for back pain to up the comfort level of your bed.
Measure the mattress and cut a sheet of 3 8 inch plywood to the same size.
Sagging mattress mattresses sag for two reasons.
This protects the mattress from splinters that can come from the plywood.