Monday, November 19th, 2007 — Texas Windstorm Insurance Association policyholders’ rates will go up begining Feb. 1, 2008, as a result of rate increases approved by the Texas Department of Insurance yesterday. Texas Insurance Commissioner Mike Geeslin approved rate increases of 8.2 percent for residential and 5.4 percent for commercial properties covered by TWIA, the state’s insurer of last resort for windstorm coverage.