Patio cover installation: what to know

What the job involves, what changes the price, and what to ask a pro.

What patio cover installation is

Patio cover installation builds or attaches a roof over a patio with posts, beams and solid or louvered roofing, flashed to the house and sloped so water drains away. It turns an open patio into a space that can be used in rain or sun, and the tie-in to the house and the drainage decide whether it stays dry.

Signs you need it

  • A patio is used often, but rain or summer sun makes it hard to enjoy without a roof over it
  • The patio gets too hot in the afternoon, and you want a roof that keeps the sun off the seating area
  • A new patio or deck has been built, and it needs a cover that matches the house and ties in to the roofline
  • An old patio cover has leaked, sagged or rusted, and it needs rebuilding or replacing
  • You want a louvered roof that can open and close for sun and rain control
  • A covered area is needed for a hot tub, a grill or an outdoor kitchen that must stay dry

What the pro does

  • Check the house wall, the existing roof, the drainage and the patio slope to plan the cover's height, pitch and tie-in
  • Set the posts on footings or post bases at the marked locations, keeping clear of the patio slab and utilities
  • Attach the ledger or the beam to the house with proper bolts and flashing, so the connection stays sealed
  • Build the beam and the rafter frame, sloped away from the house so the roof sheds water to the gutter
  • Install the roofing, whether solid panels or louvers, and fit the flashing where the roof meets the house wall
  • Install gutters and downspouts that carry the water to a safe outlet, then check the roof for leaks and tight fasteners

What changes the price

Every job is different, so we do not publish prices. These are the things that move the quote up or down.

  • Cover size, height and roof style, since a larger or taller roof needs bigger beams and more bracing
  • Attachment to the house, including the ledger work, the flashing and any repair of the wall it ties into
  • Roof material, such as solid polycarbonate, metal panels, shingles or louvers with motorized controls
  • Gutter and downspout work needed to carry the water away from the patio and the house
  • Footings and post bases, which depend on the soil, the patio slab and the wind exposure
  • Electrical work for lights, fans or motorized louvers, which is often done by a licensed electrician

What a written quote should spell out

  • Cover size, height, roof pitch and the roofing material named in the proposal
  • Attachment method to the house, the ledger or beam details and the flashing
  • Footing or post base count, size and the connection method
  • Beam, rafter and fastener sizes and spacing
  • Gutter, downspout and outlet details, with where the water goes
  • Warranty on the roof, the flashing and the workmanship, and what it excludes

Questions to ask before you hire

  • How will you flash the roof where it meets the house wall, and how is the ledger fixed?
  • What pitch do you give the roof, and where does the water drain?
  • What roofing material do you recommend, and what does its warranty cover?
  • Will the gutters carry the water away from the patio and the foundation?
  • Who does the electrical work for lights or louvers, and is that licensed?
  • Will the posts be on footings, and how do they handle the patio slab?

Red flags

  • Attaches the cover to the house with no flashing at the wall or the ledger
  • Builds a flat or back-sloped roof that will hold water on the top
  • Skips the gutters on a cover that drains onto the patio or against the foundation
  • Uses light fasteners or nails where bolts are needed for the connection to the house
  • Says the roof does not need any maintenance or inspection

What you can do yourself

A homeowner can install a small, free-standing shade kit over a patio with help and clear instructions. Call a pro for any cover that attaches to the house, any roof that must drain into gutters, any cover with heavy roofing or electrical features, and any cover in a high-wind area. Work at height and heavy roofing panels can cause falls and injuries, so use fall protection, a helper and steel-toed boots.

Licenses and permits

Patio cover installation is commonly regulated when it attaches to a house, adds a roof or includes electrical work, and a permit is often needed in many areas. Check with your state or local licensing agency and your local building department before work starts, especially for the attachment and the electrical features.

Patio cover installation questions

Why does my patio cover leak where it meets the house?

A common cause is flashing that is missing or set wrong at the house wall, which lets water run behind the roof. A pro should check and rebuild the flashing whenever the cover is attached or repaired.

Can a patio cover be attached to the house?

Yes, when the house wall and the framing can carry the load and the connection is flashed and bolted properly. Ask the pro to check the wall and explain the attachment before the job is quoted.

How do I keep rain from flooding the patio edge?

Gutters and downspouts that carry the water to a safe outlet keep the edge of the patio dry and protect the foundation. Ask the pro how the water leaves the cover and where it discharges.

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

How it works

  1. 1. Describe the job

    Pick the service, add your ZIP and a sentence about what is going on.

  2. 2. Pick the pros you want

    See screened pros who serve your ZIP and choose who you want to hear from.

  3. 3. They reach out

    They contact you the way you chose: phone, email or in-app messages.

More decks, fences and outdoor structures guides

Find a pro near you

Find a pro

About this guide

Request patio cover installation