GAF HDZ Shingles - Amish

[walterjay]

My completed example.

 

[Toro50cutter]

My completed example. View attachment 345305

And this is GAF HDZ?

 

[walterjay]

And this is GAF HDZ?

Yes. And I might add that they put that heat resistant underlayment on and the attic is much cooler.

They are supposedly lifetime shingles and warranted to not have mold or mildew blackening.

 

[Lubener]

My completed example. View attachment 345305

Ventillation is not correct. Power ventillator fans and a ridge vents do not go together. When the fan is operating, fresh air will be drawn in through the ridge vent and out the fan instead of the soffit vents which hopefully you have.

 

[Donald]

Hello, all.

Our 19 year old architectural roof is on its last legs. As a result, we are replacing it this summer with GAF HDZ shingles. We’re utilizing an Amish company who is certified through GAF.

My question is, how do these hold up? The roofer is using GAF’s tiger paw underlayment, ice and heat shield, new flashing, an GAF newer all metal pivot covers for our roof exhaust’s. Additionally, I was told by their owner they will be using galvanized nails. He assured me they do not rust and will last longer than the roof.

Your help and guidance is appreciated.

Make sure (from GAF website) that the roofer is really GAF certified. Not him telling you he is.

Leaks are almost always around flashing. It needs to be done right. Not the old flashing bent straight and reused. Our old roof had 3" step flashing. New has 6".

While they are laying down the shingles, go into front yard, look at street or eyes closed. Count the pops from the nail gun. Should be 6.

GAF requires all GAF products to be used for their warranty to be in effect. Check that.

We had HDZ shingles also. Great shingles. But there are even better if in a hail prone area.

Make sure they use lifetime silicone rubber boots for any pipes. The regular (builder grade) boots crack in less than 10 years.

We had a second floor stucco wall meet a first floor asphalt roof. We had the stucco cut back, all new step flashing and counter flashing. Then stucco redone. Looks perfect. Done right. Neighbor had roof done with same situation and the stucco was not touched. The roofer caulked the stucco to the shingles. Homeowner never knew it was not correct until I told them. Roofers do not want to mess with stucco. But don't tell you that they will find a cheap way around doing it right

 

[Donald]

Ventillation is not correct. Power ventillator fans and a ridge vents do not go together. When the fan is operating, fresh air will be drawn in through the ridge vent and out the fan instead of the soffit vents which hopefully you have.

Very true. Our home in one section did not have enough linear feet of ridge to properly ventilate that section. They added a power roof vent. When I bought the house the power roof vent was broken. When I had roof done they did not use a ridge vent in that area. Replaced power vent. I added a GAF WIFI power vent controller. Because I am a techy guy. I also have a spare power vent motor.

If you have a power vent installed, grease the shaft above the fan blade. Ask me how I know to do that?

 

[Toro50cutter]

Make sure (from GAF website) that the roofer is really GAF certified. Not him telling you he is.

Leaks are almost always around flashing. It needs to be done right. Not the old flashing bent straight and reused. Our old roof had 3" step flashing. New has 6".

While they are laying down the shingles, go into front yard, look at street or eyes closed. Count the pops from the nail gun. Should be 6.

GAF requires all GAF products to be used for their warranty to be in effect. Check that.

We had HDZ shingles also. Great shingles. But there are even better if in a hail prone area.

Make sure they use lifetime silicone rubber boots for any pipes. The regular (builder grade) boots crack in less than 10 years.

We had a second floor stucco wall meet a first floor asphalt roof. We had the stucco cut back, all new step flashing and counter flashing. Then stucco redone. Looks perfect. Done right. Neighbor had roof done with same situation and the stucco was not touched. The roofer caulked the stucco to the shingles. Homeowner never knew it was not correct until I told them. Roofers do not want to mess with stucco. But don't tell you that they will find a cheap way around doing it right

Yes, you can find them through GAF’s site!

I also am paying the difference (~$25 a pipe cover) for them to use the GAF Pivot Collars which are all metal.

I was told (the work order says so too) that they will be using all new flashing as well.

 

[tcp71]

When we had the roof done with these in 2019. One of the major factors in the warranty was ventilation of the attic as it's heat buildup from below that breaks down the shingles??? They installed a bunch of vents. Anyway, so far so good. Even through some serious hail storms (golf ball+).