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Best plywood for mattress support.
The plywood can be exactly 3 4 inch thick but ideally it should be thicker.
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It s not the best solution but plywood under the mattress is a decent temporary fix.
Wood under the mattress can splinter causing the mattress fabric to snag and unravel especially in the case of 2 sided models.
You will definitely need a strong support if your mattress is foam or latex.
There are many ways to make your mattress firmer.
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.
The thickness requirements for plywood vary depending on the type of mattress.
If finished the plywood can be put on the bed frame and the mattress directly on the plywood.
You may not get correct support.
All these types of mattresses need is a firm uniform bottom for proper support of the mattress.
A tarp or a non penetrative sheet can be used to cover the plywood.
Measure the mattress and cut a sheet of 3 8 inch plywood to the same size.
Sagging mattress mattresses sag for two reasons.
The plywood must be 0 75 inches thick.
Insufficient support from beneath or a breakdown in their internal support structures.
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Plywood should be of the same dimensions as the mattress and the bed frame.
Hope this helps brian.
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.
This may require two sheets of plywood if the bed is queen size or larger.
This protects the mattress from splinters that can come from the plywood.
Using inch thick plywood is okay but ideally you should use plywood thicker than that to provide adequate support.
A mattress with plywood will not give the same support as a fresh new mattress.
Most people prefer a firm mattress and rightly so.