Doesn't look too bad. I can do this.
Any recommendations of materials or kits out there?
1. PREPARATION
a. Remove appliances, vents, accessories & moldings; including side trim rails from roof.
b. CAUTION: When removing these items, take care not to damage. Reuse- not REPLACE
c. Existing roof is dismantled
d. Check rafters & exposed areas for damage
e. Wooden substrate is attached to the trusses (3/8 plywood recommended)
f. Plywood is extended to edges
g. Seams (gaps) are TIGHT
h. Secure with wood screws (1 inch)?Screw heads shouldn’t stick up- sink them
i. Any seams over 1/16” should be covered with 1” masking tape
j. Sand edges of plywood with sander to protect rubber membrane
k. Router or saw out vent/appliance openings
l. Sweep/blow off debris from roof
m. Check entire roof surface for screw heads or sharp objects that could cause premature failure of roof
2. INSTALLATION
a. Roof length plus 6 inches = total rubber membrane length
b. Strike line with chalk line
c. Cut membrane w/ razor knife
d. Spread membrane over roof; ensure there is sufficient length at both termination points & equal overhang over both sides of RV (NOTE: avoid standing on roof for this. Stand on ladder off to side)
e. Fold either front or back half of membrane back over itself, exposing the substrate
f. Open adhesive & stir thoroughly
g. Using a roller, spread the adhesive on the roof at a rate of 175-200 sq ft/gallon
h. For best adhesion results, let dry for 20 minutes, depending on absorption rate of substrate
i. Membrane is unrolled & laid into adhesive
j. Now the other half of the membrane can be folded back over itself, exposing the substrate
k. Repeat steps G, H, & I
l. The adhesive is cooperative. It will allow for adjustment of membrane after contact
m. Air bubbles & wrinkles can be removed so there is complete contact with the adhesive
n. Use squeegee or push-broom to eliminate air bubbles
o. Clean off old moldings
3. TRIM
a. Apply butyl tape to backside of roof edge molding
b. While holding molding, draw surplus membrane tight (use downward pull, NO NOT stretch membrane) and drive screws thru molding, membrane & framing
---Alternate method- staple membrane to framing with 1-1/2” staples, 3-5” apart (Good way to keep proper tension)
c. Install molding from center, and work way to ends
d. When molding is complete, use sharp razor knife to remove excess membrane from bottom side of moldings
e. With sharp razor knife, “X”-cut all roof openings
f. Make sure all openings are cut same size as previous openings
g. Round-hole (hole punch) all “X”-cut ends to prevent run-on cuts (like stop-drilling a crack)
h. Surplus material should be pulled tight (downward only) and stapled to openings
i. Trim excess material
j. Apply butyl tape to from and rear termination moldings
k. FRONT: Front cap should lay on top of the membrane
l. REAR: Membrane should lay on top of rear cap
m. Screw in termination moldings
n. Apply butyl tape to all appliances, vents, & roof mounted accessories
o. Reinstall appliances, vents, & roof mounted accessories with screws
i. If roof creeps & air pockets form while doing this: walk bubble toward opening & hold membrane in place while installing screw
4. SEALING (WARNING: DO NOT USE SILICONE! Silicone will not adhere to the EPDM membrane!)
a. Apply lap sealant in ¼” to 3/8” bead & should be used:
i. To bride the membrane on all appliances
ii. On both ends of the front and rear termination moldings
iii. On the top edge of side roof edge moldings
iv. On all screw heads located on the roof
5. CLEAN UP
a. Clear all surplus caulk & debris from roof
b. Allow sealant & roof adhesive to cure for 48 hours
c. After curing period, wash entire roof with mild soap & water