A roof replacement strips the old covering down to the bare deck, then rebuilds everything above it. We tear off, repair the sheathing, install new underlayment and flashing, and then apply your new covering. At El Monte Roofing Contractors, we complete that work on houses and commercial buildings across El Monte, CA.
Some roofs reach this point after a repair stops holding. Others reach it when the underlayment finally fails. Either way, the decision is another repair or a complete replacement.
On this page
How we replace a roof, from tear-off to finish
A roof replacement removes the old covering before any new material goes on. Tear-off exposes the sheathing, so we can see and repair the damaged decking underneath. We then rebuild the roof above that deck with underlayment, flashing, and the finish covering.
Soft sheathing, rusted flashing, and old patches only become visible once the covering comes off. We price and repair whatever we find while the decking is still open.
Rotted boards come out once the decking is completely bare. We replace them before any new material covers the deck. That sequence keeps hidden rot out of your finished roof.
Underlayment is the waterproof layer we roll out over the deck. Tile and shingle shed most of the rainfall. The underlayment stops whatever gets past them.
Flashing is the metal that seals the roof to walls, chimneys, and valleys. Those joints leak more frequently than open roof planes do. On a replacement we shape and install new flashing at each joint.
Repair the roof again, or replace it
One leak at a single flashing detail is usually a repair. When several roof planes leak during different storms, the whole system is near the end of its service life. That repeated pattern points toward a full replacement instead of another repair.
A ceiling stain means water already penetrated the covering and the underlayment. The stain rarely sits directly under the location where water entered.
The underlayment matters more than the appearance of the surface. Tile can still appear sound while the felt beneath it has failed. You cannot evaluate that layer from the street.
Two or three old coverings on one roof narrow your options. Adding another layer would conceal any damage in the decking below.
We still accept repairs, and one failed flashing detail may need nothing more. Our roof repair page covers that smaller work.
What moves the price of your replacement
Cost is usually the first question, and the answer starts with measurement. Roof area, the number of stories, and the pitch of each plane set the base. Roofers count that area in squares, and one square is one hundred square feet.
Existing layers increase the price, because every extra covering adds tear-off time. Disposal costs climb with every extra layer that leaves the property. Rot in the decking adds boards, labor, and hauling, and nobody can see it from the ground.
Tile adds handling, because each piece comes off and goes back by hand. Some tiles break during that work, so a tile estimate carries an allowance for replacements.
Fire zone mapping can change the assembly we install. One state rule applies when your property sits in a mapped High or Very High Fire Hazard Severity Zone. The new covering must meet new construction rules once you replace half or more within twelve months.
Outside those mapped zones, Class C is the state minimum for a roof covering. Those class letters come from a fire test of the complete roof assembly. California works from the 2025 Title 24 code, published by the California Building Standards Commission.
We can measure a roof from satellite imagery first. That provides area and shape, but it will not reveal a soft deck or a failed valley.
Call (626) 323-8814 to price your replacement, or send the details from our contact page.
Rotted decking and how we price it
Rot under the covering adds sheathing, labor, and disposal costs to a replacement. We cannot see how far the damage runs until the deck is completely bare. We write the known scope first, then add the decking work we find during tear-off.
We replace only the failed boards and leave sound sheathing in place. That keeps the decking line on your estimate tied to what the deck needs.
Roofing systems we install on a replacement
We install asphalt shingle, tile, standing seam metal, and torch-down modified bitumen. The slope of each roof plane decides most of that choice, and weight, framing, and appearance settle the rest. We match the material to the slope and the structure below it.
Asphalt shingle is a common covering on El Monte houses, and a replacement means a full tear-off. Our asphalt shingle roofing page covers that system in detail.
Tile roofs usually go back as tile, because we can reuse the pieces already on the house. Our tile roofing page explains how we lift and restack them.
On standing seam metal, raised seams lock the 24 gauge panels together. The screws sit under those seams, so the finished surface carries no exposed holes. You can read the details on our metal roofing page.
Low-slope areas need a different system from the steeper main roof. A flat porch, patio cover, or garage roof takes a torch-down cap sheet. We cover those areas on the flat roofing page.
Every full roof replacement we complete carries a ten year workmanship warranty. That warranty covers our workmanship on the roof we build for you.
Lift and relay, when the tile is still good
Tile outlives its underlayment by decades, so the tile can be sound while the felt below has failed. That job is a lift and relay. We lift the tile, replace the underlayment and any failed decking, and put the same tile back.
A relay costs less than a full replacement and keeps the roof line you have. Tell us it is a tile roof when you call, and we will price both.
Free estimate and paid inspection report
Our replacement estimate is free, and it puts a price on the roofing work. We do not bill you for it, but a written condition report is a different job. Escrow and insurance renewals often call for that report, and it carries its own fee.
The fee for that report moves with roof size and the number of stories, so ask when you call.
We keep the free estimate and the paid report separate on every job. Our roof inspection page explains what the written report contains.
Permits on a roof replacement
We help you pull the roofing permit when your city requires one. In El Monte, the Building and Safety division reviews plans, issues permits, and inspects the completed work. Permit requirements change from one city to the next, so give us the property address early.
That address tells us which office reviews your job.
What to have ready before the estimate
Start with what the roof has been doing, in your own words. A ceiling stain, a slipped tile, or a patch that keeps reopening all help us narrow it down. Then tell us the building type and roughly how old the covering is.
Old roofing paperwork can tell us the previous material, the permit history, or past repairs. Bring out whatever you have when you call, and we will work from it.
We replace roofs across El Monte, including Downtown and Arden Village. The Census uses the 91731, 91732, and 91733 areas to organize local data. Each one crosses the city boundary, and we work on both sides.
Talk to us about replacing your roof
Call (626) 323-8814 and describe the problem you are seeing on the roof. The building type, the covering, and the visible damage tell us where to start on your job. We will tell you whether that roof needs a repair or a full replacement.
The short form on this page reaches us too. Send the property address and one line about the problem. You can also see the roofing work we do across El Monte.
Frequently Asked Questions
The same questions come up before a tear-off starts on any El Monte roof. Cost, the time of year, and the choice of covering are the three that matter most. We price each roof from its own measurements, and the estimate for that work stays free.
How much money does it cost to replace a roof?
Cost follows the roof, so we price each one from its own measurements. Roof area in squares, the number of stories, the pitch, and the existing layers carry most of it. Rotted decking and tile handling can move it again, and the estimate stays free.
What time of year is the cheapest to replace a roof?
We price a replacement from the roof itself, not from the month on the calendar. Rain here arrives in one short winter window, so booking early gives you more dates. Roof area, stories, pitch, and existing layers set the number in every season.
What is the best roof for your money?
No single covering suits every house, because slope, framing, and appearance decide most of it. We price the systems that fit your roof and explain how they differ. On a replacement we install asphalt shingle, tile, standing seam metal, or a torch-down cap sheet.
