Specmar inc (previously specialty marine contractors) is an aluminum boat design, lofting, and kt company. we have a large product line including aluminum drift boats. Frequently asked questions (faq) about inflatable boats, rafts and kayaks. repair instructions, care, tips and valuable advices.. Yes, with the right house boat plans, you can start building your own now yes, with house boat plans, you can build a houseboat. when it comes to planning building a.