Author name: Commercial Solutions, Inc.

How to Slope a Flat Roof for Drainage TL;DR — Key Points: No flat roof should be truly flat — minimum 1/4″ per foot (1:48) slope is required by most building codes Four main methods exist — tapered insulation, sistered rafters, tapered crickets, and self-leveling overlays each suit different situations Drain placement drives slope design

How to Felt a Flat Roof TL;DR — Key Points: Roofing felt is a traditional waterproofing underlayer — used primarily on residential flat roofs and low-slope shed roofs Surface preparation is everything — the deck must be clean, dry, smooth, and structurally sound before any felt is applied Work bottom to top, overlap generously —

How to Insulate a Flat Roof from the Inside TL;DR — Key Points: Interior insulation is a valid option — ideal when exterior membrane work isn’t feasible or budgeted Condensation risk is the primary concern — a proper vapor barrier is non-negotiable with interior insulation Three main methods — rigid foam board, spray foam, and

How to Build a Flat Roof TL;DR — Key Points: Flat roofs aren’t truly flat — a minimum 1/4” per foot slope is required for proper drainage Structural planning comes first — rafters, decking, and load capacity must be engineered before any membrane goes down Insulation placement matters — warm roof (insulation above deck) vs.

How to Build a Deck on a Flat Rubber Roof TL;DR – Key Points: Professional assessment required first – Structural capacity, membrane condition, and drainage must be evaluated before any deck construction Protect the EPDM membrane – Use non-penetrating, ballasted deck systems whenever possible to preserve roof integrity Weight distribution is critical – Decking systems