How much does a tile roof weigh, and can your house handle it?
Last updated · Tile roofs
Short answer: Clay and concrete tile roofs weigh several times as much as asphalt shingles per square foot. Houses built for tile have rafters or trusses sized for that load, but a house built for shingles may need an engineer's review and added framing before switching. Lightweight concrete tile reduces the load but does not always remove the need for a review.[1]
How much does a tile roof weigh compared to shingles?
A tile roof weighs much more than a shingle roof. Manufacturers list installed weights per square (100 square feet), and standard concrete and clay tiles are typically several times heavier than asphalt shingles. Lightweight concrete tiles weigh less than standard tile but still more than shingles. For exact numbers, check the data sheet for the specific tile, since weight varies by profile and thickness. The Tile Roofing Industry Alliance publishes installation and design resources for tile roofs.[2]
How is roof framing designed for weight?
Roof framing is designed for two kinds of weight: dead load, which is the permanent weight of the roof itself, and live and snow loads. The International Residential Code's rafter span tables give separate columns for lighter and heavier dead loads, so the same rafter can span farther under shingles than under tile.[1] Trusses are engineered for a specific load, listed on the truss design drawings. Adding a heavier roof covering than the framing was designed for can overstress it.
When does switching to tile need an engineer?
Switching to tile needs an engineer when the existing framing was designed for a lighter roof covering, which is the case for most homes originally built with shingles. A structural engineer can check rafter or truss sizes, spans, spacing, and connections, and specify any added framing. Many building departments require engineering for a change to a heavier roof covering as part of the permit. Skipping this step can lead to sagging, cracked ceilings, or worse.
How can you tell if your house was built for tile?
You can tell whether your house was built for tile by checking the original plans or truss drawings, which often list the roof dead load. Homes in neighborhoods where tile is common, such as many Arizona, Florida, and California subdivisions, were often designed for it. If the house has tile now and the roof looks straight with no sag, the framing is likely carrying it. A roofer can point out signs of sagging, but only an engineer can confirm capacity.
Does wet tile weigh more?
Wet tile weighs more, since concrete tile in particular absorbs some water. Designers account for typical conditions when they set dead loads. In snow country, snow load is a separate design value set by local code, and a heavy tile roof plus snow adds up. Your building department can tell you the design snow load for your area.
What about going from tile to a lighter roof?
Going from tile to a lighter roof is structurally simple, since the framing was built for more weight. Some homeowners switch from tile to metal or shingles to save cost. Check your HOA rules first, as many tile neighborhoods require tile. The minimum slope rules change too: the IRC requires asphalt shingles on slopes of 2:12 or steeper and tile on slopes of 2.5:12 or steeper, so most tile roofs can take shingles.[3]
Does a refelt change the weight?
A refelt does not change the roof's weight much, because the same tiles go back on over new underlayment. Some refelts add battens or a heavier underlayment, which adds a small amount. During a refelt, crews temporarily stack tiles on the roof, and they spread the stacks out to avoid concentrating weight in one area. Our refelt guide explains the process.
What should you ask before choosing tile?
Before choosing tile, ask the roofer for the installed weight per square of the specific product, whether your framing has been checked for it, and whether an engineer's letter is included in the bid. Ask your building department whether a permit for the switch requires engineering. Get these answers before you pick colors, since added framing can change the budget.
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Frequently asked questions
Can my house support a tile roof?
Only an engineer can confirm it. Homes originally built for tile usually can; homes built for shingles often need a review.
Is lightweight tile light enough for any house?
Not always. Lightweight tile is lighter than standard tile but still heavier than shingles, so a framing check is still wise.
Do I need a permit to switch from shingles to tile?
Most jurisdictions require a permit, and many require engineering for a heavier roof covering.
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Sources
- 2021 International Residential Code, Chapter 8: Roof-Ceiling Construction. codes.iccsafe.org/content/IRC2021P2/chapter-8-roof-ceiling-construction
- Tile Roofing Industry Alliance: Resources. www.tileroofing.org/resources.html
- 2021 International Residential Code, Chapter 9: Roof Assemblies. codes.iccsafe.org/content/IRC2021P2/chapter-9-roof-assemblies
Sources checked November 4, 2026. Estimates are not quotes. Roofing, insurance, and legal details vary. Confirm with your contractor, insurer, or attorney.