material similar to plastic chair mats to cover all carpet in my apartment

I want to cover all carpet in the apartment with something like "chair mat". material.
Reason for that is that carpets accumulate a lot of dust and dust is bad for asthma. The vacuuming does not help too much because it blows the dust around the apartment, and this is exactly what makes asthma real bad.
Anyway, option to replace a floor with wood or even linoleum does not work because landlord does not allow alterations.
Plastic "chair mat" seems to be almost the right solution. But the problem is that one plastic mat is very expensive. And I need a lot.
Another problem, it will be real ugly. Where can I find big sheets made from the same material? How can I find a manufacturer of the material and buy it from them? Can the regular consumer buy from the manufacturer?
Thanks.
subject: material similar to plastic chair mats to cover all carpet in my living room
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Mark wrote:

Greetings,
You want to pay to have your carpets replaced with hardwood floors and your landlord turned you down? I think you must not have communicated with him properly. If your apartment is say, 700 ft^3, and Home Depot installs hardwood floors for $6/ft^2 go to see your landlord with $4200.00 in $100's and a sheet of paper for him to sign stating that he will call home depot and have them put in hardwood floors within the next 30 days and that he has received the money. If he doesn't want the hassle offer to deal with HD yourself. If he still turns you down let me know. I dream about such a tenant.
William
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My rookie troll-o-meter was even pegged on that post.
Around $60 for a hepa-filter vacuum cleaner.... viola!
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