lORNA,
tHE BLUE BOARD IS STUCK SO HARD TO THE SKIN,MAKES ME THINK TO REPLACE THE 1/4" PLYWOOD AND LEAVE THE BLUE BOARD WITH A RESEALED ROOF.bUT i AM CONCERNED WITH MOLD.sO i WILL TAKE IT ALL OUT.gOING TO TRY TO HEAT THE SCRAPER ALITTLE TO SEE IF THAT WILL MAKE THIS FASTER.

btw:sNOW ROOF sYSTEMS HAS ADVISED ME TO NOT TAPE SEAL THE CENTER SEAM ON THE INSIDE BECAUSE THE GLUE WOULD EFFECT THE TAPE.

Contact cement will fail under wet conditions. I would guess that your leak was very localized. You probably don't have a mold problem. Pop off the foam board with weakened adhesive and replace that part. Listen to Snow roof about the glue. Ours was all sealed from the exterior so I didn't have to concern myself about the contact cement and sealant... my repairs have held up well.... we take the Class C mostly down "primary" and "Secondary" roads as the traffic on the Interstates is getting wild.

quote:

Originally posted by Lorna:
Contact cement will fail under wet conditions. I would guess that your leak was very localized. You probably don't have a mold problem. Pop off the foam board with weakened adhesive and replace that part. Listen to Snow roof about the glue. Ours was all sealed from the exterior so I didn't have to concern myself about the contact cement and sealant... my repairs have held up well.... we take the Class C mostly down "primary" and "Secondary" roads as the traffic on the Interstates is getting wild.

Getting???? Getting worse is more like it!!!!

The traffic on the Interstates we have been running is getting very heavy, but we noticed on our weekend running around the semi's seemed the be running the primary and secondary roads alot. After the long creeping delay in Atlanta, I started working on "alternative" routes. We had ran a primary/secondary route down to Marianna Fl then picked up I-10 to finsh up the trip to Panama City. This had worked well for us. I laid out a similar route using I-75 and Hwy 441 to Franklin NC (running I-75 from Cordele to Macon). The route to Franklin took 1 hour less and was the same mileage as going thru Atlanta. And was much more relaxing. Also when we went up to Chattanooga TN a couple of months ago, we took Hwy 280 to Columbus' I-185 to pick up Hwy 27 up to around Rome. Got on I-75 at that point. Lots of Rv's and semi's on these back roads but we're still making good time. And a much more relaxed trip. I am the one driving the Class C and I am no ways near as tired as when I drove the RV strictly on Interstates. Some of the roads are "rough" since they are under construction in some places (being 4 laned like mad).

Lorna,
I am going to try a small torch to heat the 6" scraper to see if it will help losen the blueboard glue tomorrow.I'll let you know how that works out.It's kind of like the chicken or the egg question.With me having to heat the scraper,I guess I got to strip the blue baord first before I seal the roof like I wanted to.

Be careful with that torch. We don't want you toasting yourself or your RV!

Fleamarketer, That would be a very bad idea as foam heated gives off toxic fumes that can and if given the right conditions, kill you and anyone else in that rv!!! Time to rethink this over for sure!!! Take that from a old coast guard/Fireman who doesn't want to read about this in the morning news!!

Thank You Lorna/Capt Dan for chiming in.

Both of you have good thoughts about this job and are likely right.

I'll get another scraper and use two at the same time(one on one side of the area I am scraping and the other on the other side to see if it will go faster without any heat.)I will get a good knife to cut sections too.Just want to be very careful not to cut the skin.

Don't think I want to do just sections that appear damaged.The costs of the blueboard is so
cheap and I am here doing this now,makes more sense to renew all of it.Just seems like a big job right now.

Once I have it all off,what do you suggest I use to clean off all the old remaining glue that won't effect the new glue?.

Thank you for helping me so far,

Gary.

It will take gallons of lacquer thinner to clean off the old glue. How high do you want to get? The hotter it is the less you want to mess with lacquer thinner as the thinner evaporates faster and the fumes get more potent (please don't ask me how I know ). The old contact cement won't affect the adhesion of the new contact cement. What will mess it up is dirt. Clean the dirty sufaces down with TSP (you can find at Lowe's, Home Depot, anywhere that sells paint... usually in the cleaner section and/or the paint section). Surfaces must be dry.

My qualifications regarding working with contact cement.... I used to build custom laminate countertops with my Husband. We have "refaced" more kitchen cabinets than I care to think about (I hate refacing). We have built custom laminate cabinet. David has managed 2 custom cabinet shops (first one while he was still in high school) and has built bank teller systems for Debolt and cabinets for park model trailers. He has about 40 years experience in construction. I started working with him (installing cabinets) a few months before we got married (we've been married 27 years). I also can set ceramic tile (My Dad was a tile setter for 50 years). So I'm not a total idiot when it comes to some things regarding construction.

quote:

Originally posted by Lorna:
It will take gallons of lacquer thinner to clean off the old glue. How high do you want to get? The hotter it is the less you want to mess with lacquer thinner as the thinner evaporates faster and the fumes get more potent (please don't ask me how I know ). The old contact cement won't affect the adhesion of the new contact cement. What will mess it up is dirt. Clean the dirty sufaces down with TSP (you can find at Lowe's, Home Depot, anywhere that sells paint... usually in the cleaner section and/or the paint section). Surfaces must be dry.

My qualifications regarding working with contact cement.... I used to build custom laminate countertops with my Husband. We have "refaced" more kitchen cabinets than I care to think about (I hate refacing). We have built custom laminate cabinet. David has managed 2 custom cabinet shops (first one while he was still in high school) and has built bank teller systems for Debolt and cabinets for park model trailers. He has about 40 years experience in construction. I started working with him (installing cabinets) a few months before we got married (we've been married 27 years). I also can set ceramic tile (My Dad was a tile setter for 50 years). So I'm not a total idiot when it comes to some things regarding construction.

Be careful with the flame retardant contact cements as they can have a bad effect on the kidneys, liver and brain. We went with them as part of a safety program at the mill that I was head of maintenance at. We later found out that they were not as safe as we were led to believe. We did not connect the personel problems and the new cement together until one of our men was hospitalised and the toxicology came back indicating he was experiencing brain and kidney problems from the trichlorethane(?) based solvents in the non-flammable cements.

The man who was generally quiet and easy going had become very argumentative and troublesome at work and after fighting with his wife one night, had gotten into a bar room brawl which is why he was in the hospital. His wife was the one who asked for tests to figure out why he had this sudden personality shift. After treatment along with eliminating future exposure to the cement he recovered from the personality problems and returned to his normal kindly self but the kidneys are probably going to be touble for the rest of his life.

Myself I got the migrane headaches, irritability and moderate liver symptoms and now have to be careful not to cause a flareup.

We changed over to Amonia/Latex based contact cements after that and just had to deal with providing warm dry airflow to prevent condensation and speed the drying. Also had to change over to low pressure spray equipment eliminating the glue pumps and drum agitators we had been using with the other glues as the high pressure systems caused the latex to start setting up in the pumps, tanks and hoses.

Whatever type bonding agent is used make sure to read the safety sheet first and if they can't provide the safety sheet priot to or at least at the time of sale don't buy it. Our plant manager didn't insist on getting the safety sheet first and a good number of us have now been paying for his mistake for over twenty years.

Lorna, my first apprenticeship was as a tile setter and doing formica cabinetts along with formica ceilings. Time passes too quickly, that was almost 40 years ago too.