carchaeology: 01/21/25

Tuesday, January 21, 2025

Simca Abarth

Monday, January 20, 2025 - Elastomeric Roof Coating for the garage roof

The garage roof has a slight pitch but not enough really.
When it rains hard, the roof leaks slightly, mostly towards the back.
Any water entry into the garage is bad.
Has damaged some stuff in the past.

The instructions on applying the elastomeric roof coating says to thoroughly clean the surface of all dirt and dust to ensure good adhesion. So, thoroughly swept the surface.

Not a lot of debris but quite a bit of dirt/dust. Swept it all towards to middle of the roof before picking it all up with a brush/dust pan.

The product description specifically calls out use on flat type of roofs.
It's a sealer (moisture barrier and a reflective surface to reduce heat absorption).
I'm using it mostly to seal the roof from minor leaks.

The roof is flat enough that in spots, that when it rains, some water tends to pool and find it's way in through invisible joints in the layers of the asphalt sheet roofing material, even though those joints were sealed when the roofing was applied.

I had the house and garage roof redone many years ago. I had them strip the roof all the way down to the wood boards (a few of them had to be replaced on the house) and a new roof applied.
So, it's only got one layer of roofing material on the roof.
They say that you can apply up to three layers before having to strip it back to the wood again.

Wasn't sure what the consistency would be.
It's basically the consistency of paint.
Used a roller and an extension pole to lay it down.
To make it go faster, I bought a 12" roller, instead of the more common 9".
Unfortunately, it's too wide to fit inside the bucket so had to tip the roller into the bucket to pick up paint.
You could use a paint tray but you're applying so much paint that it doesn't make sense. Directly from the bucket is the best way.

After the first coat.
Need to wait at least two hours for the first coat to dry enough before applying the second layer.
The instructions say to apply two coats, with the application being perpendicular to each other.

It's been two hours.
Ready to apply the second coat.
I bought an extendable handle for the roller.
It's made in the USA and is very well made.
It has detents for extending the pole about a foot between the detents.

With the roller, can't get right to the edge where the tiles are overlapping the roofing.
Will have to go back later with a brush.

After applying the second coat.

Used almost the entire 5 gallons.
There's probably about 1/2 gallon left in the pail.
Will use it later to cover the edges where the roller wouldn't fit.