A full siding replacement follows a clear order: check the walls, agree the scope in writing, remove the old siding, repair what sits behind it, fit wrap and flashing, then install the new siding and trim. Knowing the order helps you spot skipped steps.
Request a free quote using the quote button on this page. For the main service, read siding replacement. If only part of a wall has failed, read siding repair and partial replacement as well.
The first visit and the written scope
The project starts with a site visit. The provider walks every wall, notes cracks, soft spots, loose boards, and signs of water entry, and measures the walls. Windows, doors, corners, and roof lines get close attention because they shape the trim and flashing work.
A good written scope names the material, profile, and color, states what will be removed, and lists what is included for sheathing repair, wrap, flashing, and trim. It should also cover waste removal, site protection, and how change decisions will be handled if hidden damage appears.
Preparing the house and the work area
Before removal day, plants, lights, and loose items near the walls may need to be moved or covered. Inside, pictures and fragile items on outer walls are often taken down because removal work can vibrate the frame.
Access matters too. The crew needs room for ladders, material stacks, and a waste container. Gates, drive space, and outdoor power should be agreed in advance.
Taking off the old siding
Removal usually proceeds wall by wall or in sections, not all at once. Boards or panels are taken off, fixings are pulled or cut flush, and the material is cleared as work moves along. Working in sections limits how long the bare wall sits open to weather.
Homes built before 1978 need extra care at this stage. The United States Environmental Protection Agency sets out lead safe renovation practices for older homes, including containment and cleaning steps, in its single family renovation protocols. Ask whether those practices apply to your house and how they will be followed.
Checking what sits behind the siding
With the old siding off, the sheathing is visible at last. Sound sheathing feels firm and holds fixings well. Soft, stained, or broken sections point to past water entry and need to be cut out and replaced before anything covers them again.
The source of any water entry matters as much as the repair itself. A leak at a window head, a failed roof edge, or a gap at a pipe can undo new work if it is left in place. Ask to see problem areas and to have photos taken before they are covered.
Wrap, flashing, and the water managed wall
New siding is only the outer layer. Behind it, a water resistive barrier and careful flashing do much of the work of keeping rain out of the frame. The United States Department of Energy describes this approach as a water managed wall, where each layer overlaps the one below so water that gets past the siding can drain down and out.
Openings need the most care. The Department of Energy guidance on flashing details for windows and doors shows how flashing at sills, sides, and heads works with the wrap as one system. Look for neat overlaps and clear drainage paths at the base of the wall.
Fitting the new siding and trim
Fitting starts at the base and works upward, course by course. The first course sets the line for everything above it, so time spent on level and alignment early pays off across the whole wall. Fixings, joints, and gaps for movement follow the maker instructions for the chosen material.
Trim closes the job visually and practically. Corner boards, window and door casing, and soffit and fascia pieces cover edges and shed water away from joints. Caulk seals small gaps at trim, but it is not a substitute for proper flashing behind the siding.
Cleanup, walkthrough, and records
As each wall is finished, offcuts and old fixings should be cleared. At the end, a full site sweep matters because nails and sharp scraps can hide in grass and planting beds. Check paths, beds, and drive areas yourself before you sign off.
The final walkthrough is your chance to view every wall in daylight, test that vents and fixtures sit correctly, and note any touch ups. Keep the written scope, product details, and color codes in one file. You can also check the areas hub to see where referrals are available.
What shapes timing and total cost
No two projects price the same way because the work behind the wall differs. House size, height, and access shape labor time. Material choice, trim detail, and sheathing repair shape material needs. Permit requirements, waste handling, and lead safe practices on older homes can add steps. A scope that separates the base job from repair work helps you compare offers fairly.
Frequently asked questions
How long does a full siding replacement usually take?
Timing depends on house size, number of stories, material choice, and what is found once the old siding comes off. A small, simple house can move faster than a large house with complex corners, many windows, and repair work to the sheathing. Weather also matters, since wrap and flashing need dry conditions to be fitted well. Ask for a written schedule with clear stages.
Do I need to leave the house during the work?
Most people stay in the house during a siding replacement. The work happens outside, though you should expect noise from removal, cutting, and fixing, plus limited access to some doors and paths at times. Crews usually need clear space along the walls and access to outdoor power. Ask in advance which sides will be worked on each day so you can plan around it.
What happens if rot or damage is found under the old siding?
The crew should pause that section, show you the affected area, and explain the repair before covering it again. Sound work means replacing soft or broken sheathing, fixing the source of the water entry, and fitting new wrap and flashing before the new siding goes on. Get the added scope and cost factors in writing before that section is closed up.
Will permits be needed for a siding replacement?
Rules vary by place and by the scope of the work. A like for like siding swap may be treated differently from a job that changes sheathing, structure, or window openings. Your provider should check with the local building office before work starts and tell you what, if anything, must be filed. Keep any approval paperwork with your house records for future reference.
Sources
- EPA single family renovation protocols
- DOE water managed walls
- DOE flashing details for windows and doors
Common questions
How long does a full siding replacement usually take?
Timing depends on house size, number of stories, material choice, and what is found once the old siding comes off. A small, simple house can move faster than a large house with complex corners, many windows, and repair work to the sheathing. Weather also matters, since wrap and flashing need dry conditions to be fitted well. Ask for a written schedule with clear stages.
Do I need to leave the house during the work?
Most people stay in the house during a siding replacement. The work happens outside, though you should expect noise from removal, cutting, and fixing, plus limited access to some doors and paths at times. Crews usually need clear space along the walls and access to outdoor power. Ask in advance which sides will be worked on each day so you can plan around it.
What happens if rot or damage is found under the old siding?
The crew should pause that section, show you the affected area, and explain the repair before covering it again. Sound work means replacing soft or broken sheathing, fixing the source of the water entry, and fitting new wrap and flashing before the new siding goes on. Get the added scope and cost factors in writing before that section is closed up.
Will permits be needed for a siding replacement?
Rules vary by place and by the scope of the work. A like for like siding swap may be treated differently from a job that changes sheathing, structure, or window openings. Your provider should check with the local building office before work starts and tell you what, if anything, must be filed. Keep any approval paperwork with your house records for future reference.