Johnson Construction & Roofing, L.L.C., in Ottawa, IL, is a leading roofing specialist serving Marseilles, Seneca, LaSalle and the surrounding areas since 1991. Our services include residential roofing, shingles, free estimates and more. We carry CertainTeed, Metal Valley and Lifetime Shingles. For all of your roofing needs, contact Johnson Construction & Roofing, L.L.C., in Ottawa.