Waterproofing in Honolulu, HI
Commercial waterproofing seals the vulnerable transitions where most leaks actually start — parapet walls, deck-to-wall joints, plaza decks, and below-grade areas. It uses membranes, sealants, and flashing details engineered for standing water and thermal movement, not the shingles-and-underlayment approach used on sloped residential roofs.
Top Waterproofing Contractors in Honolulu
Listings updated July 2026
Aloha Roofing Inc
Honolulu, HI
Aloha Roofing Inc. serves Honolulu commercial clients with flat, low-slope & metal roofing for retail, office & multifam...
Elite Roofing Honolulu
Honolulu, HI
Elite Roofing Honolulu provides commercial roof coating, repair, and replacement across Oahu for retail, office, and mul...
KING'S ROOFING
Honolulu, HI
King's Roofing provides commercial flat and low-slope roofing services in Honolulu, HI, including TPO, modified bitumen,...
Oahu Roofing & Repairs Honolulu
Honolulu, HI
Honolulu commercial roofer with dedicated crews for TPO, flat roofs, hotels & multifamily. 24/7 emergency service, water...
Gold Pacific Roofing
Honolulu, HI
Licensed Honolulu roofer (C-42 #38336) offering TPO, modified bitumen, silicone coatings & metal systems for O'ahu comme...
Voyager Roofing
Honolulu, HI
Voyager Roofing offers commercial low-slope, metal & repair services across Honolulu and all Hawaiian Islands. 2025 RCAH...
R & C Roofing Contractors
Honolulu, HI
Licensed Honolulu roofing contractor (C 33642) serving commercial & multifamily properties with installs across modified...
All Around Roofing & Waterproofing LLC
Honolulu, HI
Honolulu-area commercial roofer offering 24/7 flat roofing, coatings, metal, and waterproofing across Oahu for multifami...
MRC Roofing LLC
Honolulu, HI
MRC Roofing LLC serves Honolulu commercial facilities with SPF, silicone/acrylic coatings, modified bitumen, and metal r...
HI Point Roofing Hawaii
Honolulu, HI
HI Point Roofing Hawaii provides commercial roofing inspections, repairs, maintenance & replacement across Honolulu and...
LeakMaster Roofing
Honolulu, HI
LeakMaster Roofing provides commercial flat, metal & coated roof systems in Honolulu, HI with 20-yr warranties on qualif...
FBC Roofing
Honolulu, HI
GAF Master Elite® roofing contractor serving Honolulu and all of Oahu with roof replacement, storm damage repair, and gu...
Protech Roofing LLC
Honolulu, HI
Protech Roofing LLC provides commercial roofing in Honolulu, HI—flat roofs, modified bitumen, metal, coatings, maintenan...
Pamalu Roofing
Honolulu, HI
Pamalu Roofing (Lic. CT 36649) serves commercial properties across Honolulu and all Hawaiian islands, including hotels,...
Rainbow Roof Maintenance
Honolulu, HI
BBB-accredited commercial roofer serving Honolulu & Oahu. Flat roofs, coatings, maintenance programs, emergency repair,...
What to Expect from Waterproofing
Initial consultation and site assessment
Leak-source diagnosis (not just the visible interior stain)
Written proposal with detailed scope of work
Repair matched to your existing system to protect the warranty
Final walkthrough and documentation
Waterproofing Pricing in Honolulu
Pricing varies by contractor and project scope
Request quotes from multiple contractors to compare pricing. Factors that affect cost include system size, building type, equipment brand, warranty terms, and urgency. Always ask for an itemized written estimate before authorizing work.
Get free quotes from Honolulu contractorsRelated Repair Services in Honolulu
Frequently Asked Questions — Waterproofing in Honolulu
How much does waterproofing cost in Honolulu, HI?
Waterproofing costs in Honolulu vary based on system size, building type, and scope. Request quotes from multiple contractors through My Roofing Tech to compare pricing. Always ask for itemized written estimates before authorizing any work.
How do I choose the best waterproofing contractor in Honolulu?
Look for contractors with specific experience in commercial roofing (not just residential). Verify their state license, insurance, and bonding, and confirm they're certified and experienced with your roof system. Check reviews from similar commercial properties. Ask about their workmanship warranty and their typical response time for follow-up issues.
How long does waterproofing typically take?
The timeline depends on the size and complexity of your roof system and the scope of work. Simple repairs often complete in a few hours. Larger installations and replacements may take several days to a few weeks. Emergency service typically stabilizes the problem within hours even when the permanent fix requires returning with materials.
Is waterproofing covered by building insurance?
Generally, sudden storm or accidental damage may be covered by commercial property insurance, while gradual wear and deferred-maintenance issues are not. Contact your insurance provider and ask specifically about coverage for your roof system. A documented inspection report strengthens any claim you file.