Austin roof installation at a glance
- New roofs for custom homes, additions, garage apartments, ADUs, porches and detached structures.
- Additions tied into your existing roof so the seam does not become your next leak.
- Shingle and metal systems installed to building code and manufacturer specifications.
- We coordinate dry-in, flashing and inspections with your builder or general contractor.
On a new roof, the details that matter most are the ones you will never see again once the job is done: how the deck is fastened, where the self-adhered membrane goes, how the flashing laps behind the siding. Austin Roofing approaches every Austin roof installation as if we will be the ones answering the phone if it leaks in fifteen years — because we want to be.
We install roofs on new custom homes, room additions, second stories, backyard cottages and outbuildings across Austin and Central Texas. Whether you are a homeowner managing your own build or a contractor who needs a dependable roofing sub, we bring the same attention to framing, ventilation and water management on every project.
Roof Installation Projects We Take On
New custom homes
Complete roof systems on new residential construction, from dry-in through final ridge cap, scheduled around your framing and exterior trades.
Room additions & second stories
New roof sections that match your existing material, color and pitch as closely as possible, with a watertight tie-in.
ADUs & garage apartments
Backyard cottages and garage conversions are popular across Austin. Smaller roofs still need full code-compliant details.
Porches, patio covers & carports
Low-slope and metal options for covered outdoor space — the right material depends on the pitch your structure allows.
Detached garages & shops
Exposed-fastener or standing seam metal and architectural shingles for workshops, barns and storage buildings.
Material upgrades on new builds
Moving a builder-grade spec to Class 4 impact-resistant shingles or metal before the roof goes on, when it costs the least to change.
Tying an Addition Into an Existing Roof
The single most common problem we are called to fix on additions is not the new roof itself — it is the joint between new and old. Two roofs built years apart, often by different crews, meet at a valley or a wall, and water finds the weakest lap. A good tie-in involves more than matching shingle color:
- Weaving or cutting the valley properly. Existing shingles are removed back far enough to install continuous self-adhered membrane under both roofs.
- Step and counter-flashing at walls. Where a second story or addition wall meets a lower roof, each course gets its own step flashing, tucked behind the weather barrier.
- Kick-out flashing. At the bottom of a roof-to-wall joint, a kick-out diverts water into the gutter instead of behind the siding or stucco.
- Ventilation continuity. New attic space has to be vented on its own or connected to the existing system, otherwise heat and moisture build up in the addition.
Matching an older roof: shingle colors fade and product lines get discontinued. On a roof more than 10 years old, a perfect color match is rarely possible. Sometimes re-roofing the existing slopes at the same time is the better long-term value — we will show you both options. See Austin roof replacement for what that involves.
Code Details We Build To
Most jurisdictions in Central Texas build on versions of the International Residential Code, with local amendments. The table below summarizes common roof installation requirements and how we handle them. Always confirm the current rules with your local permitting office, since adopted code editions and amendments change.
| Component | What code generally addresses | How we install it |
|---|---|---|
| Roof slope | Minimum pitch for asphalt shingles, with extra underlayment on lower slopes | We recommend metal or a low-slope membrane where pitch is too shallow for shingles |
| Underlayment | Approved underlayment over the entire deck | Synthetic underlayment plus self-adhered membrane in valleys and at penetrations |
| Drip edge | Required at eaves and rakes on shingle roofs | Metal drip edge on every eave and rake, correctly lapped with underlayment |
| Fastening | Nail count and placement per manufacturer and wind requirements | High-wind nailing patterns, hand-checked placement |
| Ventilation | Minimum net free vent area based on attic size | Calculated intake and exhaust, balanced for the attic volume |
| Flashing | Flashing at walls, chimneys, valleys and penetrations | New step, counter, kick-out and pipe flashing on every job |
Our article on roofing permit requirements covers inspections and who is responsible for pulling the permit, and our underlayment guide explains felt vs synthetic vs peel-and-stick.
How We Work With Builders and Homeowners
Plan review
We review the roof plan, pitches and material spec, flag any slopes too shallow for the chosen material, and quote the full system.
Schedule around the build
We line up dry-in with your framing completion and coordinate with window, siding and stucco crews so flashing laps in the right order.
Dry-in
Decking is checked for fastening, then underlayment, drip edge and valley membrane go down to get the structure weather-tight quickly.
Finish roofing
Shingles or metal panels, flashing, ventilation and ridge are installed once other trades are clear of the roof.
Inspection and handoff
We are available for required inspections and provide photos of the hidden layers for your records.
Roof Installation for Austin’s Climate and Neighborhoods
A roof installed in Austin has to handle attic temperatures that can climb well past 140°F in August, spring hail, and fast-moving thunderstorms with straight-line winds. That is why we put so much weight on ventilation and fastening for every Austin roof installation, and why we often suggest radiant-barrier decking and lighter-colored or reflective roofing on new builds, where those choices cost the least.
Terrain matters too. Homes on exposed Hill Country lots in Dripping Springs and west of MoPac take more wind than those tucked into older central neighborhoods, while new subdivisions in Leander, Hutto and Kyle often have HOA material and color rules to follow. In parts of the region with wildfire-related building requirements, roof covering fire ratings also come into play. We check the rules that apply to your address before materials are ordered. See our Leander roofing and Dripping Springs roofing pages for more local detail.
Choosing Materials for a New Roof
New construction is the cheapest moment to upgrade. Swapping a builder-grade shingle for a Class 4 impact-resistant composition shingle, or choosing standing seam metal, adds cost now but avoids paying for a tear-off later. Use the calculator below to compare how long each material is likely to last in Central Texas, then request a free quote and we will price the options side by side.
Why Build With Austin Roofing
- Local crews who understand Central Texas heat, hail and wind
- Careful tie-ins and flashing details where additions meet existing roofs
- Clear communication with homeowners, builders and inspectors
- Installation to manufacturer specifications to protect warranties
- Free, no-pressure quotes and a clean jobsite with magnetic nail sweeps
Planning a build or addition? Send us your plans for a free roof installation quote or call (956) 465-6045.
Roof Installation FAQs
Do you work as a subcontractor for builders?
Yes. We install roofs for general contractors and custom builders as well as for homeowners managing their own projects, and we coordinate scheduling with other trades on site.
Can you match my existing roof on a new addition?
We match material, profile and pitch as closely as possible. Color can be harder on older roofs because shingles fade and lines get discontinued. We show you the closest available match and, if it makes sense, the cost of re-roofing the existing slopes at the same time.
What roofing material is best for a low-slope porch or patio cover?
It depends on the pitch. Asphalt shingles need a minimum slope and extra underlayment on shallow pitches. Below that, metal panels rated for low slopes or a membrane system are usually the better choice. We check the pitch before recommending a material.
Does a new roof installation need a permit?
New construction and additions almost always require building permits, and the roof is inspected as part of that process. Requirements vary by city and county, so we confirm the rules for your address.
How long does it take to roof a new home?
Once the framing and decking are ready, dry-in is often completed in a day. Finish roofing depends on size, material and how other trades are scheduled — most single-family homes take a few working days in total.