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Hi Phil,

I've installed quite a few LaQuinta roofs and typically they use a product called Decra or Gerard. You can look up either of those products and the cleaning recommendations are under the technical bulletins.

Hey Phil,..although it's always good to start with a light mix and move up,...but if you tried to clean asphalt shingles with the strength manufacturers recommend you'd be there all day and in many cases it may not ever work. Point being, don't count so much on the percentage they recommend,.you'll end up wasting effort.

I haven't any idea what this roof is like or it's condition,..but fiberglass can be tough to clean sometimes if it's in degraded condition. I've done a few of the old corrugated fiberglass roofs and it took a strong mix to clean in every case,..but most were in rough condition.

Jeff

Yeah Jeff, so true. Degraded fiberglass is very porous. We had a duradek roof that was very hard to clean due to it's degraded porosity.

I was thinking about this today,where I live there is a few Decra roofs that need to be done, so I went to there site and found this.http://www.decra.com/PDF/cleaning.pdf