R-Panel Metal Roofing for Shops, Barns and Outbuildings
R-panel is the ribbed, screw-down steel panel you see on shops, barns and plenty of barn-style homes around Houston. It goes on fast and covers a lot of roof, and it lasts when the screws, laps and closures are done right.
Veteran BuiltCypress, Texas
An R-panel sheet is roughly three feet wide, with tall trapezoid ribs and smaller ribs between them. It fastens through the face with self-drilling screws carrying a rubber washer, into wood or steel purlins or a solid deck. Because the fasteners are exposed, every screw is a spot that has to seal. That is the trade: a quicker, simpler system than standing seam, with a maintenance item standing seam does not have.
Most R-panel problems come back to screws. Overdriven, the washer squashes out and splits. Underdriven, it never seals. Driven at an angle, it leaks from day one. We drive them square at a set depth, in the pattern the manufacturer calls for, and keep the screw lines straight so a missed one stands out. Over the years, Houston sun dries out washers and daily heating and cooling loosens screws, so plan on having them checked every few years and replacing any that have backed out.
Side laps go on the side away from the prevailing wind so rain is not driven into the joint, and end laps get sealant tape. Foam closures cut to the panel profile fill the ribs at the eave and ridge. Purlin spacing has to match the panel’s span rating for the wind load, and we check it before the first sheet goes up. On an open building, a vapor barrier or insulation under the panels keeps the underside from sweating onto your tools on a humid night.
Houston roofs live hard. Spring hail, hurricane season from June to November, summer storms that throw straight-line wind, and attic temperatures that cook shingles from underneath. Algae streaks the north slopes. None of that means every roof needs replacing, but it does mean an inspection has to look at the attic, the vents and the flashing, not just the shingles you can see from the yard.
The straight answer on r-panel metal roofing
How we decide, written down so you can hold us to it.
- You are roofing a shop, barn, carport or barn-style home where the ribbed look fits.
- You want metal on a utility building that goes on quickly over purlins.
- An existing R-panel roof has rusted-through panels that need to come off and be replaced.
- On a home in an HOA that only allows standing seam, R-panel is off the table, and we will not argue for it.
- If the slope is very low, exposed fasteners sit in more water than they should, and standing seam is the better system.
- If your R-panel roof only leaks at a few screws, new washered fasteners fix it without new panels.
How we run it
- I
Check the framing
We confirm purlin spacing and condition against the panel’s span rating and the wind exposure before ordering.
- II
Barrier and layout
A vapor barrier or insulation goes on if the building is open underneath, and the first panel is squared to the eave.
- III
Panels and screws
Sheets go on with side laps away from the prevailing wind, and screws are driven square, at the correct depth, in straight lines.
- IV
Closures and trim
Foam closures at the eave and ridge, trim at the rakes and walls, end laps sealed, and every screw line checked.
What we ask before we price it
- How old is the roof, and has it been repaired before?
- Any ceiling stains, and do they come back after every rain or only in a storm?
- Is there an HOA with rules on shingle color or material?
- Are you talking to an insurance carrier about this roof, or paying out of pocket?
- Do you know who installed the current roof, and is there any paperwork from it?
How long do R-panel screws last?
The washers are the weak point, and Texas sun dries them out over time. Checking the screws every few years and replacing loose ones keeps the roof tight. Longer-life fasteners exist and are worth asking about.
Can R-panel go on a house?
Yes, and it does on many barn-style homes. Check your HOA first, because many subdivisions do not allow exposed-fastener metal on houses. Out in the county with no HOA, it is a common choice.
What gauge is R-panel?
Most is 26 gauge, with 29 gauge sold for light agricultural use and 24 gauge for tougher jobs. On anything people live or work under, we use 26 or heavier.
Will R-panel drip inside my shop?
It will if warm, humid air meets the cold underside of bare steel. A vapor barrier or insulation under the panels stops it. Adding it after the roof is on is much harder than doing it at install.
Can I have R-panel on the shop and shingles on the house?
Sure, and it is common on rural properties. Pick a panel color that sits well with the house roof and trim. Where an attached structure meets the house, the flashing has to be done properly.
How do you keep wasps and birds out of the ribs?
Foam closure strips go in at the eave and the ridge. Without them, the open ribs are a front door for wasps, birds and wind-driven rain.
Who you are hiring
Leland Cannon spent 21 years in the Army and retired as a First Sergeant. Geoff Schardien served in Air Force Security Forces and has more than twenty years in residential construction. One of them walks every job before it starts, and you keep one phone number from the first visit to the last day.
We are a service-disabled veteran-owned company based in Cypress, verified by the Texas Veterans Commission. The person who writes your scope is the person you call if something is not right.
Google reviewers have given us 5.0 across 19 reviews, and the word that keeps coming up is honest. We would rather talk you out of a job than sell you one you do not need.