A hairy floor

[Trowser Chilli]

Well I laid the Armorseal down today on my hanger and garage floor.
The hanger looks great. The garage looks like it has hair in it.

I'm planning on one more coat of Armorseal and then Rexthane.
A contractor friend stopped by and said the hair is due to fiberglass in the floor. It's only in the garag.

Never heard of this. The hanger is bare concrete.

I etched and ground the floors for prep.

Any ideas on the hairs?

 

[softailgarage]

Fiberglass in the floor? What kind of floor do you have?

 

[machsnell]

It is fiber which is designed to make the concrete more resistant to cracking. Fiber is a good thing except of course if you are coating your floor.


Sent from my SM-G900V using Tapatalk

 

[BlackTalon]

fiber reinforcing strands? I've seen them get burned off by lightly hitting with a torch.

 

[Cypherian]

Well I laid the Armorseal down today on my hanger and garage floor.
The hanger looks great. The garage looks like it has hair in it.

I'm planning on one more coat of Armorseal and then Rexthane.
A contractor friend stopped by and said the hair is due to fiberglass in the floor. It's only in the garag.

Never heard of this. The hanger is bare concrete.

I etched and ground the floors for prep.

Any ideas on the hairs?

If you had fiber mesh concrete poured what your seeing is the strands of fiberglass. Quickest way I was shown to get rid of them were wait till the concrete is cured 3 or 4 days and just slide a cinder block across the floor to break the fibers off. Mind you this was on a brush finished floor it left some scuffs but after it getting wet a few times they were gone.

Cypher

 

[Armorpoxy]

A light grind of the fibers and then recoating usually fixes this. As noted above, the fibers were added to the concrete mix to add strength. Usually burning them off works well, but if the floor is coated, then you need to remove them mechanically.

 

[Trowser Chilli]

Holy Jesus. I won't be removing them mechanically.

Yup it has fiberglass in it for strength. It was ground with a floor grinder. Now the hairy surface is showing. It already has Armorseal on it. I guess I'm sol.
There's not one sight of a crack on it.

At least the hanger looks good so far. It has spider cracks due to being just concrete. At least it's not hairy.

 

[Armorpoxy]

We have had customers with this issue run over it with a sanding screed. Now that the hairs are 'hard' (we call this the hair gel effect!), they should knock down well with sanding.

Then vacuum well, and recoat with epoxy.

 

[BlackTalon]

The fiberglass is for crack control, shrinkage reduction and increased toughness more so then for 'strength'. Those fibers take the place of the shrinkage control steel (i.e., the wwf in a slab-on-grade)

 

[softailgarage]

Good info to know, think I'll avoid it in the future.

 

[LegacyIndustrial]

If you sand these, don't use a really rough screen. Try 120, if ok then fine if not drop to 100. Make sure you wipe the floor well with denatured alcohol prior to coating.

Good luck

 

[Angelfire]

Holy Jesus. I won't be removing them mechanically.

Yup it has fiberglass in it for strength. It was ground with a floor grinder. Now the hairy surface is showing. It already has Armorseal on it. I guess I'm sol.
There's not one sight of a crack on it.

At least the hanger looks good so far. It has spider cracks due to being just concrete. At least it's not hairy.

This confuses me a bit....you ground the floor and then the hairs appeared?

 

[LegacyIndustrial]

Fiberglass added for strength.


Sent from my iPhone using Tapatalk

 

[Trowser Chilli]

This confuses me a bit....you ground the floor and then the hairs appeared?

That is correct.
Think of it as opening up the surface and now the fiberglass strands are sticking out.
I believe if you continue to grind the floor you will just keep exposing fiberglass hairs in the concrete.
It makes sense to burn them off. I already put a coat of Armorseal on though.
I'm going to roll with an additional coat of Armorseal now.
Then the Rexthane.

 

[SteveCh]

Yes burning off works, or it did for a friend of mine.

Don't know what a "hanger" is in relation to floors.

 

[Trowser Chilli]

Yes burning off works, or it did for a friend of mine.

Don't know what a "hanger" is in relation to floors.

My house has an airplane hanger, I live in a fly inn community. I decided to do the hanger floors also.

 

[Radix2]

I'd certainly try a light sanding with a screen in a floor buffer - sanding between coats - just to knock off any stuck in the top coat. No grinding or trying to remove your first coat, just get rid of the hairs, dust, ect. like you would do between coats of paint.

you could try a small spot by hand to see if it works or not first.

 

[SteveCh]

My house has an airplane hanger, I live in a fly inn community. I decided to do the hanger floors also.

Ok, I'm slow, you mean hangar.

 

[Trowser Chilli]

Ok, I'm slow, you mean hangar.

Lol apparently I'm slow, hangEr. It's a concrete box.

 

[RatchetWerks]

I had the same issue with the first floor I did.
After, I thought it was the fiberglass in the floor as well.

When I was doing my 2nd floor, I made sure to burn the entire floor prior to coating. Afterwards I had the same exact problem!

After applying some logic and reasoning. I concluded that the hairs from the paint roller were shedding off.

For my 3rd floor,I purchased some more expensive epoxy/solvent grade 1/4" nap rollers and briskly brushed the rollers prior to use. No more hairs!

If you look at my website, I outlined the process and tools that I used.

Let me know if it helps you.

EDIT: I reread your reply #7, did you see the hairs prior to applying the coating? Or after it was applied?

 

[Trowser Chilli]

The hairs were not seen to the naked eye before the epoxy.
I already did 2500sq ft of concrete with the same rollers without issue.
As soon as I saw the hairs I thought time to replace the rollers.
I did and the results were the same.