Welcome

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RSI Roofing & Building Supply is Hawaii’s largest roofing supply business. Since 1983, we have been providing only the finest roofing and building products at the most affordable prices. We have the experience you want, and the service you expect. RSI has been a division of Allied Building Products Corp. since November 2006.

Ritchie Mudd started RSI in 1983 and has grown the business to include locations on the four islands of Oahu, Maui, Kauai, and the Big Island. With the customer in mind, we have geared our service toward convenience by investing in vehicles and equipment designed specifically for rooftop delivery. Our customer service philosophy can be summed up in one phrase, “On time, on budget, on the roof.”

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Whether you are a contractor or a homeowner, you owe it to yourself to stop by RSI Roofing & Building Supply for all your roofing, building, waterproofing, and insulation product needs. Our extensive showroom and knowledgeable staff has never made selecting the right products for your new construction or home improvement project so easy! Call or stop by today. You’ll be glad you did!