Sunroom addition: a guide for pros
What customers ask, how to win the job, and what to put on your profile.
Offering sunroom addition
Sunroom additions sell on the view and the light, and they fail on seals, roof joints and heat. Win the job by being clear about the use the room is built for and by showing the joints in detail.
What customers ask
- Will the room be comfortable in summer and winter?
- What glass do you use, and will it fade or leak?
- How do you keep water out where the roof meets the house?
- Can the room be heated and cooled, and how much will that depend on the glass?
- Does this need a permit, and how long will the approval take?
How to win the job
- Ask on the first visit whether the room will be used in winter, and write the answer into the proposal so the insulation and heat are scoped correctly.
- Show the glass specification on a sheet, with the frame material, the glass type, the coating and the seal warranty named.
- Draw the roof-to-house joint with the flashing and drainage path marked, and explain how the joint will be checked after the install.
- Quote the heat and cooling as a separate line with the unit size chosen for the glass area and the room use.
- Give the customer the window orientation and shading options on a simple sketch, with the summer heat effect noted.
- Name the foundation and the floor finish in the quote, and state how the room connects to the house.
- Bring glass and frame samples so the customer sees the color, the finish and the view through the glass.
What to put on your profile
- Photos of the sunroom from inside and outside, with the glazing and roof joints visible
- Close-up photos of the flashing and the roof-to-house connection during construction
- A photo of the heating and cooling unit or the duct run, with the sunroom in use
- A list of the glass and frame types you install, with their warranties named
Follow-up that helps the customer
- A care sheet for the glass, the seals, the screens and the roof panels
- A check after the first heating season and the first summer to look at seals, condensation and cooling
- Advice on adding shades, a ceiling fan or a window film later, offered only when the customer asks
Licenses and permits
Sunroom additions often need building permits for the foundation, framing and electrical work, and heating and roofing are often inspected. Confirm your contractor registration, trade licenses and insurance in your state and locality before you take the job.
Questions
Should I warranty the glass seals?
Pass through the manufacturer's warranty and state it clearly. Do not add a longer warranty on seals you did not make, and explain what the warranty covers and what it does not.
How do I price a sunroom kit against a custom build?
Compare the foundation, the roof, the glazing and the heat as separate lines. A kit may reduce the framing work, but the foundation and the connection to the house still need to be built and inspected.
About this guide
This national guide is written and checked by infinibell. Rules and conditions differ by place, so local pros are credited on guides for the cities they serve, not on national ones.
Edit history
- Oct 29, 2026: Drafted by infinibell to our content guidelines.
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