Now in the last month of the sublease, my sub-tenant is refusing to pay the agreed amount saying landlord didnt repair heater in a timely fashion last month.

-You can paint the walls with DryLock or some other paint but it really doesn't solve your problem in any permanent fashion.

Was it an led, fluorescent, or old fashioned 100w incandescent?

Hi Brian,Those little color flecks look old fashioned enough that it might be.Also in the old days they used to trowel on glue under it that had asbestos in it too.If it were my deal, I'd grab a piece of that tile with some of the glue on it drop it in zip lock and send it out for a test.https://www.google.com/search?

While I did not suffer loss, I found them difficult to work with: the web interface was kludgy, document requirements were presented in piecemeal fashion, and documents sent over their “secure” connection were lost, leading to delay.

I keep hearing and seeing over and over One of the biggest mistakes landlords make is failure to start the eviction process in a timely fashion .

As for tools to accomplish this, its just good old fashion research.

For the last three years now, the tenant has been acting in what I consider to be a strange fashion concerning the rent. 

In a similar fashion, the cap raisers (at least the quality ones), first and foremost represent you/ "your taste buds"!

The IRA purchases property, pays for the expenses, and receives the income in a tax-sheltered fashion.