Using inch thick plywood is okay but ideally you should use plywood thicker than that to provide adequate support.
Best plywood for mattress support.
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.
If finished the plywood can be put on the bed frame and the mattress directly on the plywood.
All these types of mattresses need is a firm uniform bottom for proper support of the mattress.
Most people prefer a firm mattress and rightly so.
The plywood can be exactly 3 4 inch thick but ideally it should be thicker.
Hope this helps brian.
You will definitely need a strong support if your mattress is foam or latex.
Sagging mattress mattresses sag for two reasons.
The thickness requirements for plywood vary depending on the type of mattress.
This protects the mattress from splinters that can come from the plywood.
The plywood must be 0 75 inches thick.
A tarp or a non penetrative sheet can be used to cover the plywood.
Plywood should be of the same dimensions as the mattress and the bed frame.
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.
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.
It s not the best solution but plywood under the mattress is a decent temporary fix.
There are many ways to make your mattress firmer.
Using plywood may not allow the mattress to breathe properly and the wood can hold moisture even mold.
Ditch your uncomfortable mattress for nectar s memory foam mattress with a lifetime warranty.
This may require two sheets of plywood if the bed is queen size or larger.
You may not get correct support.
A mattress with plywood will not give the same support as a fresh new mattress.
Insufficient support from beneath or a breakdown in their internal support structures.
Using plywood board between the mattress and the bed frame can provide the additional support you need.
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.