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Description
GAF EnergyGuard Grade-II (20 psi) Polyiso Roof Insulation, 2.7 in Thick, 4 ft x 8 ft PanelsEnergyGuard Grade II Polyiso Roof Insulation (2. 7" x 4' x 8') Rigid polyisocyanurate roof insulation with glass fiberreinforced cellulosic felt facers for durable thermal performance. Grade II formulation delivers 20 psi compressive strength in 2. 7 inch thick 4x8 panels, ideal for commercial roofing assemblies. Key Features: High Compressive Strength: Grade II formulation provides 20 psi for robust rooftop durability Efficient Thermal Core:
EnergyGuard Grade-II Polyiso Roof Insulation (2.7" x 4' x 8')
Rigid polyisocyanurate roof insulation with glass fiber–reinforced cellulosic felt facers for durable thermal performance. Grade-II formulation delivers 20 psi compressive strength in 2.7-inch thick 4x8 panels, ideal for commercial roofing assemblies.
Key Features:
- High Compressive Strength: Grade-II formulation provides 20 psi for robust rooftop durability
- Efficient Thermal Core: Polyisocyanurate foam core helps improve energy efficiency in roofing systems
- Reinforced Facers: Glass fiber–reinforced cellulosic felt facers enhance dimensional stability and handling
- Commercial Approvals: Meets ASTM standards; FM Approved, UL Classified, Florida and Miami-Dade approvals, PIMA Quality Mark
- Bundle Coverage: 17 pieces per bundle covering approximately 544 sq. ft.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | GAF |
| Product Name | EnergyGuard Grade-II (20 psi) Polyiso Roof Insulation |
| Panel Dimensions | 4 ft x 8 ft |
| Thickness | 2.7 in |
| Compressive Strength | 20 psi (Grade-II) |
| Core Material | Polyisocyanurate foam |
| Facers | Glass fiber–reinforced cellulosic felt |
| Pieces per Bundle | 17 |
| Bundle Coverage | 544 sq. ft. per bundle |
| Item Weight | 17.152 lb (per piece) |
| Unit of Measure | SQ | PC |
| Style | Polyiso |
| Applicable Standards and Approvals | ASTM C1289 Type II (Class 1); ASTM D1621; ASTM D2126; ASTM C209; ASTM E96; ASTM E84; FM Approved; UL Classified; Florida Building Code Approved; Miami-Dade County Approved; PIMA Quality Mark |
| Manufacturer Number | 20 2.7 |
| Product Number | GAF27ISO |
Frequently Asked Questions (FAQ):
Q: What are the panel dimensions and thickness?
A: Each panel is 4 ft x 8 ft and 2.7 inches thick.
Q: How many pieces come in a bundle and what area do they cover?
A: A bundle includes 17 panels, covering about 544 square feet.
Q: What is the compressive strength rating?
A: Grade-II panels are rated at 20 psi compressive strength.
Q: What standards and approvals does it meet?
A: ASTM C1289 Type II (Class 1), ASTM D1621, D2126, C209, E96, E84; FM Approved; UL Classified; Florida Building Code and Miami-Dade County Approved; PIMA Quality Mark.
Q: What are the facers made of?
A: Glass fiber–reinforced cellulosic felt facers bonded to the polyiso core.
Sleek, Structural Warmth for Elevated Roofscapes
EnergyGuard’s refined, sand-toned surface brings a tailored sensibility to the layers of a roof assembly. The reinforced facers read crisp and confident, supporting a silhouette that feels both modern and enduring. Pair it with clean metal edges and a monochrome membrane for a polished, architectural statement. It’s a foundational piece that whispers luxury through performance and precision.
Choose EnergyGuard Grade-II to reinforce your roof with 20 psi strength and efficient insulation—order today to streamline your next install.
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4.2 ★★★★★
Based on 2050 reviews
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Product Reviews
★★★★★ 4
🖤🖤4 Stars🖤🖤
Format: Kindle
“There are darknesses in life and there are lights. You are one of the lights...The light of all lights.” - Master of Salt & Bones.
REVIEW: This book follows Isa who lives with her aunt on an island. Isa begins a new job as a caretaker for the dark, and mysterious Blackthorne family. A family who is disliked and even feared by the rest of the inhabitants of the island. However, as she grows closer to the man who they call the devil, Lucian Blackthorne, Isa sees for herself what the truth of Blackthorne manor really is.
This book is a dark romance! Originally I was told it was fantasy, which I don’t agree with at all. It is more of an erotic, gothic feel with some mystery sprinkled in. The plot was very interesting and kept me intrigued. This book was also quite steamy, however, I felt those scenes were well done and didn’t take away from the rest of the book.
Overall, the content in this book is quite dark and the backstories of the characters involve potentially triggering matters. Be aware to look these up if you feel like you need to. Overall, this is the first book I have read by Keri Lake, and I am excited to read more.
SYNOPSIS: When I was a little girl, I dreamed a handsome knight would come and rescue me from my wretched mother. He'd ride up on his white steed and break the curse I've been fated to carry since the day I was born.
Funny how things changed over time. How the fairy tale twisted into something far more crooked, darker than I ever imagined.
In reality, my knight is scarred and broken, living alone in a castle of bones that overlooks the sea. He isn’t searching for me. He never was.
Lucian Blackthorne is as cursed as I am, and equally shunned by the locals, the fishers of men, who believe him to be the devil in the flesh. Perhaps he is, with the way his amber eyes draw me in, ignite me like an infernal blaze. And the sins he whispers in my ear are as wickedly intoxicating as the man himself.
Yet, his touch is heaven and his will is my weakness. He calls us forbidden, an unsalvageable tragedy, with no happy end. Maybe we are. But in this story, he’s the one who needs saving.
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Reviewed in the United States on August 11, 2020
★★★★★ 5
one of my top reads of 2023 🖤
Format: Paperback, Format: Paperback
Master of Salt & Bones by Keri Lake review (no spoilers)
♾️/5 ⭐️
4/5🌶️
🏰gothic dark romance
🎹murder/mysteries
🏰age gap
🎹spicy
🏰touch her & d!e
🎹secret society
🏰dual POV & a past timeline for Lucian
“we’re the composers, the conductor’s of our own fate, and we write the notes to a beautiful, dark melody that no one else can hear.”
this book was AMAZING ❤️🔥
i couldn’t put this book down for anything .
this book gives beauty & the beast / phantom of the opera vibes with a lot more going on . Lucian hires Isadora to help take care of his mom, not his nurse but a companion for her . Isadora has a painful past & she’s willing to do anything to get out of town to make some money , even if that means working for a guy with a thousand bad rumors about him . the way Lucian talks to Isadora is like he’s speaking poetry without even trying . the wording & quotes in this book were chiefs kiss . the spice in this book was gold 🔥 the plot of this book is super original & sooooo twisty . i think there were 5 different twists at the end & i had my jaw on the floor at all of them .
literally obsessed with this book . the writing was beautifully done 🫶🏼
this is my first book by Keri & i will now be ordering more from her immediately🖤
this book is definitely in my top reads of the year!
as always check your TW 🤍
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Reviewed in the United States on September 29, 2023
★★★★★ 5
So Worth the Read
Format: Audiobook
I absolutely loved this book. The pacing was great, the characters felt real, and the story kept me hooked the entire time.
There were a few moments that genuinely surprised me, and I appreciated how everything came together at the end. Highly recommend for anyone who enjoys Dark Romance/ Gothic Fiction
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Reviewed in the United States on March 4, 2026
★★★★★ 4
4 star read - dark gothic romance
Format: Kindle
Master of Salt and Bones by Keri Lake
4 STAR READ
“You’re my curse. Staying away from you, is like trying to hold my breath when the tide is rising.”
This book reminds me a lot of Nightshade, also by Keri Lake, but without the fantasy element. It gives off the same gothic vibes, including flash backs, history of abuse, and sexual deviances. It also has some overlap with the older male character obsession that is seen in Nocticadia - though Lucien doesn’t hold a candle to Professor Bramwell.
SUMMARY
Lucien was abused, lied to, and manipulated his whole life, by everyone who should have protected and cared for him. A wealthy heir to a massive fortune, he is hard, dark, and delicious. The story unfolds across two timelines, jumping between Lucien’s past and present, and Isa’s POV. Lucien is viewed as the devil of Tempest Cove, covered in scars and rumors abound involving the death of his wife and son. Isa is the daughter of the town whore, who has struggle to fit in and cope with the tribulations of her life. Lucien hires Isa to be his mother’s companion, to keep her company and encourage her to get out of bed each day. As they continue to bump into each other and interact, their relationship develops beyond his dark obsession. Lucien is wary to get attached as his connection to a dangerous secret society puts everyone he cares about at risk, however there may be no way around Isa’s involvement.
WHAT I LIKED and DISLIKED
It was a great story full of tragedy and resilience. Both characters have deep back stories that unfold throughout the book, we get information at just the right time to make things make sense. It is really well told. It does feel a bit slow in the middle, I took a mid book break to read something else but came back to it and wondered why I stopped - the reason I gave 4 stars was because I had the need to take the break. Which tells me I lost interest during part of it.
Lucien has so many layers and each one is full of sadness and devastation. Isa’s story is tragic in its own way, however her youth has her dealing with them in a difference way - she is definitely more detached in her own way.
There is an age gap - Lucien is 33, Isa is 19 — I’m not usually a fan of this kind of age gap, but Isa isn’t childish or immature so it works. The book definitely gives Grumpy x sunshine vibes. The spice is well done and paced well throughout the book.
If you like spicy, gothic, dark romance and have enjoyed other books by Keri Lake this book will not disappoint.
There are references to rape, sexual abuse, physical abuse, and mental illness — I would check any triggers before reading
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Reviewed in the United States on June 17, 2025
★★★★★ 5
Great start
Format: Kindle
I loved this book! It's funny but still deals with tough themes, like chronic illness, a serial killer on the loose, and a dash of self-harm. The guys are interesting and distinct, we don't know too much about them yet. It does end on a really terrible cliffhanger but on the bright side the next book is out and I believe the series is complete. I have enjoyed both of these authors separately and this is a great team up!
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Reviewed in the United States on May 2, 2025