Techniques for driving long screws through thick exterior foam, hitting narrow rafters?

What techniques are you using to for accurately driving long screws through thick exterior foam, hitting narrow 2×10 type rafters?  At some point the ratio becomes difficult, especially if the… What techniques are you using to for accurately driving long screws through thick exterior foam, hitting narrow 2×10 type rafters?  At some point the ratio becomes difficult, especially if the…Read MoreGreenBuildingAdvisor