When the primer is dry, caulk all small joints (less than ¼-inch-wide) in the siding and trim. Most pros use siliconized acrylics—paint won't stick to straight silicones—but Guertin and O'Neil like the new, more expensive urethane acrylics for their greater flexibility and longevity. O'Neil stresses that it's shortsighted to skimp on caulk. "If the joint fails, you're back to square one." Guertin uses the lifetime rating as his quality guide. "I don't expect 35-year caulk will last 35 years, but it should last longer than a 15-year caulk."

Just wondering. In the polybutylene story the Ask This Old House trailer is sitting in the driveway of the home in Virginia. Richard is there to emcee but a local company is hired to do the work, so Richard needs no tools. Does someone tow the empty trailer to these distant sites just to use it in the exterior shots? Or, do they haul the lighting and cameras and such cross country in it? Or, do they rent a trailer locally and just temporarily apply an AskTOH wrap for the cameras? Westminster House Painting

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