AlphaGrade™  System Restores Gravel Roofs

The perfect restoration solution for aging gravel-surfaced roof systems is here! We revolutionized our industry once again with AlphaGrade, the first ever, bio-based polyurethane liquid applied restoration system for existing gravel surfaced built-up roofs (BUR). AlphaGrade's bio-based technology locks down rock & rolls over gravel to transform your roof from a tired and aging surface to a new bright white shine. This unique system keeps your existing roof system in place so you can avoid unnecessary costs, environmental waste, and occupancy disturbances.

If you have an aging gravel surfaced BUR, look to the future with AlphaGrade and extend the life of your roof today.



Let’s Get To Work!

Schedule your FREE Building Assessment

  • In-Person/No Contact or Virtual Meeting
  • Roof Audit
  • Diagnostics
  • Recommendations
  • Project & Asset Management


Welcome to the AlphaGrade System

As gravel-surfaced roofs age, the rock can become loose and a danger in high winds, or a possible threat below. High-cost and labor intensive replacement options or short-term solutions such as foam recovers and asphalt-based flood coats are no longer your only options! You now have a high-performing liquid applied system that fully restores aging, problematic gravel rooftop surfaces. With AlphaGrade, Tremco takes the hard work out of roof replacement. Our building envelope and roof experts start by qualifying your roof, remove loose gravel, apply AlphaGrade liquid applied three layer system. The process eliminates disruption to your facility, excess waste, and gives your building a bright white finish. 

Why Choose Tremco

Our local team of experts will work with you with your goals, budget, and any known problems before we set foot on your property. In addition to services such as roof assessments, diagnostics, and analysis, we'll provide a detailed implementation of your proactive plan that may consist of remedial repairs, roof maintenance, roof restoration, and roof replacement. 

Contact Your Tremco Rep! 

The Choice Is Simple 

We manufacture and deliver products and services that perform at the lowest possible life-cycle cost. Our solutions range from new construction to replacement or restoration and we will help you stop leaks before they happen through ongoing maintenance programs. Building owners gain the peace of mind that comes with industry-leading system warranties — all from a single source platform.



Simple Three Step Gravel Roof Restoration!

Remove Loose Gravel


Our process simply starts with safely removing any loose gravel and debris, cleaning, and preparing the roof surface. 

Apply AlphaGrade


AlphaGrade RockLock technology locks in gravel surfaces adding a deep layer of protection. 

Bright White Finish


Finish with the environmentally friendly AlphaGrade Base & Top Coats.

Three Layers of Protection

Tremco's AlphaGrade restores existing gravel built-up roof (BUR)

Tough as they are, gravel-surfaced built up-roofs (BUR) often deteriorate with age. Until now, all you could do was install a short-term restoration solution or replace or retrofit the roof, which can be very expensive, labor-intensive, messy, and disruptive. The innovative AlphaGrade process is simple, and features three layers of protection.

  1. We start by removing old, loose, and potentially dangerous gravel from the existing roof top. The first layer of AlphaGrade protection is then applied to lock in the rock, and form a bond to the existing gravel surface.
  2. The second layer, AlphaGrade Base Coat seals in the leveling coat and provides an additional layer of waterproofing.
  3. The third and final layer of AlphaGrade top coat offers a bright, highly reflective finish that protects the system and reduces energy usage.

    The fully restored system is installed in as little as a few days, has no smell, can help you avoid landfill waste, or disruption to your facility and its occupants. Why replace, when you can restore with AlphaGrade. 
  • Literature

    Access everything you need to stay in the know with AlphaGrade™ Restoration Systems. Here you will find Product Data Sheets on AlphaGrade, AlphaGrade Base Coat, and 
    AlphaGrade Top Coat, Marketing Material for contractors, building owners, and facility managers.

    • Product Data Sheets


      Download all Product Data Sheets conveniently in one easy-to-share document right here!

      Download Product Data Sheets

    • Marketing Material

      Check out the marketing material below available to contractors, facility managers and building owners. Mobile-friendly versions are available for reading on any device and you have the option to conveniently download, print and share.



      AlphaGrade Flyer 




  • FAQs
    • What is the AlphaGrade System?

      AlphaGrade is a two-component, 100% solids, low VOC bio-based polyurethane system.

    • What makes up the AlphaGrade System?

      The AlphaGrade system includes a leveling coat that secures remaining embedded gravel, a base coat that offers an added layer of waterproofing protection, and a highly reflective top coat that provides a weather-resistant finish.

    • How can I use the AlphaGrade System?

      AlphaGrade is designed to restore aged gravel-surfaced asphalt built-up roofs.

    • How much waterproofing does the AlphaGrade System offer?

      On average, the AlphaGrade System will result in 250-300 dry mils of waterproofing depending on coverage rates. Combine that with the average 250 mils of the restored built-up roof and you have over 500 mils of waterproof protection.

    • What makes AlphaGrade sustainable?

      The products themselves carry a wide range of sustainable features such as high bio-content, post-consumer recycled content, and highly reflective finishes which can result in a reduction in energy usage and the Heat Island Effect. The restoration application preserves existing roofs, reduces landfill waste, and offers re-coat options to continue to maintain your current roof decades into the future.

    • Where can I purchase AlphaGrade?

       Contact your local Tremco Rep. Click Here to Find a Rep