Instal storm doors on a vinyl door frame

iamca

I have a double front metal doors with lites on both sides and a transom above. I am looking to install double all glass storm doors. I had a big box contractor come and take a look and was told the door frame is hollow vinyl - so they would not install storm doors and the vinyl frame is not strong enough. Are there any options to reinforce the door frame or possibly a kit to allow storm door mounting?

Windows on Wash

Most of the support of the doors is at the jambs where there should be some wood somewhere.

The non-structural parts can be attached to the door but be sure to pre-drill the holes or it will crack the vinyl.

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iamca

Sorry it took so long to respond. There is wood at the door jamb but that's the extent of it. Beyond that on the outside is 5 inches of vinyl or PVC frame.I did some "exploratory" drilling and research and I attached a drawing. I now believe the correct term for this material is multi-chamber vinyl or pvc. So without any wood or metal close by is this PVC frame ok for mounting and supporting storm doors? If so - what type of screws would I use? And the last question is should I use screws long enough to hit more the one of the "chamber walls"? Appreciate any advice here.

Thanks

iamca

The attachment didn't show up on my last post

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bourne78

so what did you end up doing?