I guess third option would be to replace OSB with plywood and top with thinner Oak flooring.
Particular Board, Chip Board, Wafer Board, whatever, this originated in the early 1970s when the Chinese came to America and was "given" tree stumps in Oregon State and other areas in the Northeast. Americans thought they were crazy offering to remove the vast areas of bald Mountain Tops (forestry remains). The Chinese built giant platforms in international waters and glued the chipped from the stumps to make "wafer boards" and sold the product back to America and profited greatly. The American Roofers and builders had seen this new cheap 3 dollar wafer board as a profit margin and went crazy with it. Soon... the glue disintegrated from the heat of the sun and condensation. Millions of rooves were replaced within a years time. New modern OSB, Particular Board, still disintegrates when moisture is introduced, Water based glue is the fear and problem. Cheap is Cheap no matter how you look at it...you get what you pay for.
I have a lot of rotting on my house. As I am having it repaired I have discovered that the sub siding is something like a thick cardboard, I don't know if it's this OSB I've been reading about or something even worse. It's almost like a thick cardboard? Any ideas and should I replace it all, even though I can't afford to?
If the design called for plywood then it should plywood. Although your not sure if it's OSB or anther material that was used that's not the specified material as you pointed out, many homes use OSB to save money, as a contractor for 35 years I rarely use anything other than ply, I don't need a customer to call me back ten years from now because of a failure or problem, ply wood is a sound-stable and predictable solution and why the architect specified the material, especially on a Victorian that deserves the good material to go another 100 years.
I want to clarify for everyone that the Huber woods advantech is engineered OSB ; And in my opinion is the best sheeting on the market, outside of HDO(although I would not recommend them for same uses so that leaves OSB in the lead for its uses)The fastener holder power and resistance to wear and damage even if left exposed temporarily to the elements. There are cheaper OSB sheeting available and that's where the misunderstanding comes into play but it's not the sheeting. Oh and btw any time I find MDF on a job I replace it. Contractors only reason for using it has to be too rip home owner off either in building quality or by charging them for more expensive material. I suggest that any one just learning use the same mindset toward MDF
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