Blazer top sag / repair

[jaros44sr]

Originally Posted by mcampbell

My friend did the foam trick with bad results. He called one day all excited about how well the foam had lifted the sags out of the top. about 2 hours later the tune changed. As the foam starrted to cure the sags returned to the top layer and started to push the bottom (inside) down. He got the bottom back in place by propping it up with 2 x 4's but didn't discover a way to pull the sags out of the top layer before the foam cured. Maybe if wood screws were put in the sags and wired to the ceiling and the bottom layer were propped up first then the foam would fill and hold it all in place but with out some bracing the foam won't

Thanks for the feedback, thought for sure that would work....oh well, maybe a silver lining. If you brace the inner panel to the floor the blow foam could only push the outer panel up

[BOHICA]

Originally Posted by jaros44sr

Thanks for the feedback, thought for sure that would work....oh well, maybe a silver lining. If you brace the inner panel to the floor the blow foam could only push the outer panel up

No, probably not. With a stanchion in place, you're bracing the inner panel off of the floor and using all of the pressure from the foam to force the top panel up. However, once you remove the support, the pressure will be divided between the top and bottom. The most likely result is that once everything settles, you'll achieve mixed results. The roof probably won't sag as much, but the ceiling will.

[blazerboss]

Originally Posted by BOHICA

No, probably not. With a stanchion in place, you're bracing the inner panel off of the floor and using all of the pressure from the foam to force the top panel up. However, once you remove the support, the pressure will be divided between the top and bottom. The most likely result is that once everything settles, you'll achieve mixed results. The roof probably won't sag as much, but the ceiling will.

What about reversing the gravity affect by flipping it upside down while it cured?

[NorthernMatthew]

I think I might benefit by being able to access that assembly guide.
Thanks a bunch for sharing.

[Tomq]

Hi Northern Matthew;
I have this assembly manual,but is somewhat difficult to follow,no consistencies,The portion I would like to find info on is how does a person change out the bottom rail that has the hold-down anchor bolts? Do you have to cut out the entire rail, aluminum I think, then build a steel rail with captured nuts, then resurface the SMC outer layer? I have a good top, just the anchor bolts are rusted from the inside. Thanks for looking,any suggestions!! Tomq