100% Silicone White Roof Coating on a Modified Bitumen Roof ​⁠ 

I am going to tell my wife to do our roof tomorrow while I am watching the game.

I am getting ready to do this to my roof! Thanks for the video. Good work!

Great job I'm now thinking of doing this on my carport roof. I've had 10 roofing estimates for a nearly flat roof, all the roofers want to put TPO on... and charge me an arm and a leg plus my first born. I love this idea.

Awesome. I'll be doing mine next month. Thanks for the tutorial, very helpful as I plan to do it myself. Aloha

Good job

thanks, your video was helpful. I also covered an older torch down modified bitumen roof. In case people are looking for tips, my biggest one is that Henry wants the coating to be 22 mil. They want one gallon to cover 66 square feet, which is one 5 gallon bucket for 320 square feet. But how do you know how thick that is when you're rolling? You don't want half a bucket left after 320 square feet! You have to pour the coating into an empty one gallon container, and pour it evenly over a 66 square foot area. Do not dump it all in the middle ... in warm weather, it is really hard to spread it, like molasses. Then roll it out. You will find that a 3/4 inch nap 9" roller cover makes a lot of wet noises when it is really 22 mil and not thinner... hard to describe, but kinda crackly sounding. If you don't see some roller rippling in the finish right when you put it on (which levels out over 5 minutes) you are probably rolling it out too thin. As for application, after I learned how thick it has to be by rolling the gallon into 66 square feet, I then just moved on to dipping the roller, including part of the frame, into the bucket and loading up as much as I could, then rolled out about 3x3 feet per overflowing roller. 3' x 4' was too much, area, it made that roller full roll out too thin, lost that wet sound when rolling out. I found it helpful to tap the roller about 6-8 times within the 3xx3 area to distribute the material before actually rolling it.... cuz it isn't easy to spread, at least not with a 3/4 inch roller cover which most recommend. I took about a minute and a half to dip the roller thenb roll out every 3x3 square, making sure it got spread evenly Oh, and white rooves are not legal in my neighborhood because the houses are built up a hill, where houses above don't want the sun reflecting into their windows from my white roof... so I used Henry 887 grey/gray, which is only sold at Home Depot. I lose about 20% of the reflectivity, but at least it is legal for my association and I also needed it for some areas of my roof that pool water. Also, I think a light grey roof color is better looking than pure white.

This seems ok but not long term. In the UK we have something called Classicbond pro. It’s a fleece backed EPDM membrane, it will go straight over the top with a PU adhesive.

Normally on the wall transitions I put fabric. The built in gutters I always relined with copper

its a decent product, which will need redone every few years with the exact same product...because nothing else will stick to it, all the best!!🙂

what if you had not used the seam repair material? did Henry recommend that or you thought of it yourself?

Hi nice job, I’m contemplating doing the same thing for my roof. Just wanted to ask about the age of the roof area , also the dimensions and how much of the “paint” was used. 🙏

Just think of 1000 sandwiches lined up guys and your spreading some miracle whip, nice even layer you don’t want to run out on that last piece of bread

You think this will go over asphalt shingles?

Yeh should have grabbed the extra $50 to dust the wood bee holes!LOL

Would it be okay to leave the sealant exposed without doing the roof coating on top?

In 1991 my parents had their flat roof done by a company that used the white silicone and it had a 20 year warranty. It lasted about 20 years or more and it started leaking. Our father had passed away and our mother was in a nursing home when I moved into the house. I couldn't find the paper work for the roof and our mother had dementia so there we had no idea who they were. We had a new roof put on the had the white pea rocks built in. The house was definatly a lot cooler with the white silicone coating. This past May after one day of heavy rain the roof had a leak in the front bedroom. I've been thinking of hiring a company to apply the white silicone over the roof, but after seeing this video I'm going to do it myself and save a lot of money. The only thing is, is that it's been in the mid 90°'s with high humidity with the heat index of mid 100° - 112° temps this June. Luckily it hasn't leaked since then even with all of the rain we've been getting.

Use to be $180 5 gallon now they charge $ 445 for 5 gallon insanely expensive .

so we can use the black color or the white color for this right?

What did it cost you to do this roof?

How long does this last ?

We decided against using this product b/c we were told once you go silicone, you are married to it. Instead, we used fiber mesh and roofing cement on all seams. Then once cured, we did 3 aluminum silver coats. which protects the roofing cement seams, fills in all of the voids where the granules came off the modified bitumen, and prevents more granules from coming off. If a seam ever needs repair in the future, we can do the repair with roofing cement or torch down a new piece of modified bitumen. I hate the granulated modified bitumen roofs, the granules do not stay attached and you inevitably end up having to coat it anyways,

there was no point in doing the seams separately if you didn't use the mesh with it

Silicone over asphalt is not recommended. Asphalt over asphalt is recommended. If you need to re asphalt now, you have to tear it all down.

Why would you do that?

Ruins roof. Do not use silicone coating on roof. Cannot use anything else on top of it. And it makes a vapor barrier on outside that causes condensation on the underside. Should be outlawed.

Do not use silicone on asphalt modified roofs. It will not stick.

to thin, milady. this isn't paint

Silicone isn’t good for anything more than a window. Garbage system.

You're not supposed to mix silicone