A: You should consider replacing your roof window if it is leaking, has significant condensation, or if the frame is damaged or rotting. Other signs include difficulty opening or closing the window, drafts, or noticeable cracks in the glass. Replacing an old or damaged roof window can improve energy efficiency and the overall comfort of your home.

A: The time required for a roof window replacement can vary depending on the size of the window and the complexity of the installation. Generally, a professional installation can take anywhere from 4 to 8 hours, including removal of the old window and fitting the new one.

A: There are various types of roof windows available, including fixed, opening, and skylight models. You can choose from options like manual or electric opening windows, as well as models with energy-efficient glass, ventilation features, or UV protection, depending on your needs and budget.

A: Yes, replacing an old roof window with an energy-efficient model can improve your home's energy efficiency by reducing heat loss or preventing drafts. Modern roof windows often have advanced insulation features and low-emissivity glass to enhance thermal performance and keep your home more comfortable.

A: Whether you need a permit for roof window replacement depends on local building codes and regulations. In many cases, if the window replacement involves structural changes or is visible from the exterior, a permit may be required. It's best to consult with a contractor or your local building authority to determine if a permit is needed.