Sticky windows, drafty doors, and cold rooms usually trace back to sashes, seals, and insulation. Guides here cover fixing windows that stick or will not stay up, replacing torn screens, stopping drafts, and repairing doors that stick, sag, or will not latch. Insulation and sealing guides round it out, from attic hatches and R-values to sealing air leaks around the shell. Start with the window or door that is giving you trouble.