Boral Roofing Clay Tile Frequently Asked Questions
What are Boral Roofing Clay roofing products made of? They are made of 100% of nature’s finest clays.
What are the advantages of clay? Clay offers the very best in the following categories: Strength, Durability, Timeless, Fire Proof, Fade Proof, Grade 1, and Attractiveness.
Strength – Pound for pound stronger than cement based products
Durability – A beautiful tile that provides a lasting shield against the effects of the sun, wind, and rain.
Timeless – For a look of enduring elegance, nothing compares to the beauty of an authentic clay tile.
Fire Proof – Our tiles are kiln-fired at over 1,900 degrees Fahrenheit and are Class “A” rated.
Fade Proof – Guaranteed not to fade*, streak, blotch, or effloresce.
Grade 1 – Suitable for application in any environment.
Attractive – The color of clay is integral to the types of clays we mix together. Don’t settle for tiles that obtain their color by spraying or painting color onto the surface.
How long will it really last? The warranty remains in effect for as long as the original homeowners are living in the home. Clay tiles date back for thousands of years. Even today you can still see handmade clay tiles on roof tops inside the Shaolin Temple dating back to 495 AD. US Tile has refined the manufacturing process to become the industry leader. Plus, with new technology, the quality and durability of our clay tiles will continue to perform over the test of time.
Will the color of my Boral Roofing product fade? No! The enduring quality of our clay tile never fades away. We even give you a 20 year guaranty*. The color of our clay tiles are typically unaffected by exposure to the elements or the sun’s harsh UV rays; the same is not true of concrete tiles. Although concrete roof tiles can be manufactured with an integral pigment that colors the entire thickness of the tile, you will never find a concrete manufacturer that will provide you with a No Fade Warranty. But it never hurts to ask!
Can I walk on my tile roof? Yes, but be careful. Any sloped surface can be dangerous to walk on and may be slippery. Avoid stepping on the cut tiles on the hips or valleys. Most professionals know that if they are going to spend a lot of time on a tile roof when repainting the house or cleaning the chimney, they will put down sheets of plywood to dissipate their weight and movements over a large section of roof tiles.
Will the Life Value Cost of a roof tile affect the value of my home? The value of your roof decreases each year so long as you own your home, unless you have a lifetime roof. Roofs that need to be replaced will drop the value of your home when it's time to sell. Obviously, our Lifetime Warranty* insures the greatest Life Value Cost available for your roof.
Will I need to paint my roof? No, the true rich color of clay will never fade away.
Is it a warrantable item if the color comes off or fades? Yes! Boral Roofing covers fading in our warranty for the first 20 years. You will not find another product that offers you the same guarantee.
What kind of Warranty does US Tile provide? Simply put, Boral Roofing has the Best Warranty Available! Boral Roofing provides a Transferable Lifetime Limited Warranty with Fade and Labor Coverage*. We challenge you to find a better warranty. The tile will pass the water absorption and flexural strength test established by the ICC Evaluation Service, Inc. In addition, we offer 20 years for protection on color fading and 10 years of labor coverage for latent defects.
What does Limited mean in Lifetime Limited Warranty? We limit the warranty for a Lifetime for the original homeowner. When the home is sold the warranty can be transferred to the next homeowner for a duration of 50 years.
Where can I buy Boral Roofing products? At most roofing specialty yards. Check the distributor locator on the web site to find a distributor near you.
How do roof tiles get broken? Most commonly when a branch crashes down during a storm. Sometimes when someone isn't watching how they are walking and step down too roughly on the tile.
If I see broken tiles on my roof, am I going to get a leak during the next rain? Not normally, the underlayment ("tar paper") provides a secondary barrier to the weather. The broken tiles should be replaced as quickly as possible to keep the rain on top of the tiles and to prevent the sun from cooking the tar out of the underlayment.
Is Boral Roofing really energy efficient? There are a number of factors that contribute to a product's energy efficiency. One factor is the resistance to the migration of heat or cold through the system. Because Boral Roofing products have dead air spaces between the underside of the tile and the roof deck, there is an opportunity for excessive heat or cold to escape and not be transferred into the attic space. The dead air space provides insulation from the hot and cold elements.
How does roof tile perform in high winds? The weight of the individual tiles plus standard fasteners keeps the tiles in place in areas with wind speeds up to 80 miles per hour. In areas of higher winds, there are alternative fastening methods that can withstand up to 140 mile per hour wind speeds.
How are tiles fastened in high wind areas? Unfortunately that is one of those "that depends" questions. It depends on a number of factors, the mean height of the roof, the maximum expected wind speed, what part of the country the building is in, what section of the roof (field, perimeter or ridge) and what the local building officials require. The additional fastening criteria can be as little as 2 nails per tile to as much as 2 screws per tile. In areas of high wind it would be advised to use Plywood instead of Orientated Strand Board (OSB) for greater pull out strengths.
Has any testing been done on Tile Roofs in Seismic Zones? A University of Southern California study was commission by the National Tile Roofing Manufacturers Association (NTRMA) to study the performance of clay and concrete roof tiles in seismic areas. All tiles were attached to the experimental roof decks in accordance with Tables 15-D-1 and 15-D-2 of the Uniform Building Code. Both clay and concrete tile were installed at roof slopes of 5:12, 12:12 and 24:12 and tested at forces in excess of 1.4g (gravity acceleration) in both parallel and perpendicular direction. Results of the tests proved that current fastening requirements are adequate to resist tile displacement for forces twice as strong as required by the Uniform Building Code.
Are ProShake and ProSlate only used in the Sunbelt areas? No! ProShake / ProSlate Tiles are suitable for any area in the United States. With the Grade 1 and Class “A” classification you will find that ProShake Plus will be a welcomed tile to any area. We pride ourselves in the fact that the tile is the best possible product in the market for wood shake replacements. You will not find any other product that will outperform it.
How are tiles fastened to the roof according to Uniform Building Code? Fastened in accordance with Tables 15-D-1 and 15-D-2 of the Uniform Building Code (UBC). Fasteners shall be 11 gauge corrosion resistant nails with a minimum 5/16 inch head size of lengths sufficient to provide the 3/4 inch penetration into the deck or through the deck that is required by code. Either an 8d or a 10d nail satisfies the requirement for an 11-gauge shank size, but only the 10d satisfies the requirement for the 5/16-inch head. Roofing nails have the correct size head. Clipped nail guns cannot be used as the head does not meet the diameter requirements of the building code. Coil nails must be of a sufficient length to satisfy the code requirements.
How important are tile underlayment's? The underlayment is a secondary weather barrier as some moisture may get past the roof tiles and onto the underlayment. You may want to choose an underlayment that will last for 50 years, since the only reason to reroof will be to replace an underlayment that has been compromised.
Do pine needles or leaves on my tiles cause my roof to leak? Extreme accumulations of leaves or pine needles in the valleys or interlocks can force water onto the underlayment. If the underlayment is installed as the secondary weather barrier then there should be no problems, however since water is underneath the primary weather barrier, any tears or punctures in the underlayment can allow water into the structure. Sometimes if enough debris builds up in the valley or roof to wall flashings, the water can be channeled over the diverter ribs and onto the underlayment under the tile.
How big do valleys or pan flashings have to be? This is another of "it depends" questions. The standard valley starts as a 24-inch wide sheet metal that then has ribs and channels bent into it. This generally provides an effective channel ½ inch deep and 20 inches wide under the tile. If the valley is exceptionally long, or another roof drains into the lower valley then a valley should be designed to accommodate the additional volume. There are a number of designs incorporating ribs that support the overlaying tile and allow for clear channels under the tile.
My roofing contractor installs my roof slightly differently than your recommendations, how does this affect my warranty? The written Alignment Guide from Boral Roofing are our recommendations. The local building official determines the minimum requirements to secure and weatherproof the roofing system. There are a number of ways to correctly install a tile roof based on the climatic conditions. Your roofing contractor may include upgrades in his installation that are outside of Boral Roofing’s recommendations simply because we do not have enough experience with the roofer's technique or choice of accessory products. However, in all cases the local building official has the final jurisdiction on the installation requirements and quality of the materials used. It is important to recognize that Boral Roofing’s recommendations are not warranties on the performance of the installed system. Boral Roofing’s warranty is that the roof tiles will last a Lifetime. When your roof is applied you should have two warranties one for the roof tile from Boral Roofing and one for the installation from the roofing contractor.
When must chipped tile be replaced? When the structural or weather proofing performance of the tile is compromised. Some of the factors that determine the integrity of the tile are:
• Complete horizontal or vertical breaks.
• Broken corners above the 2 1/4-inch overlap.
• Broken water channels extending past the 2 1/4-inch overlap.
• Cover locks with less than the 2 1/4-inch overlap may be repaired with the proper roof tile adhesive. Care must be taken with the adhesive to not block the water channel.
• If the small cover lock piece is not available, then aesthetic consideration takes precedence over functional consideration. On low slope roofs the missing piece may not be as noticeable as on a steeply sloped roof. If the corner piece is not available, aesthetics become a factor that must be considered. In all cases, if the missing chip affects the weather integrity of the roof it should be replaced.
How do I choose a qualified roofing contractor? You should thoroughly investigate several contractors because a good roof requires a qualified contractor as well as quality roofing materials.
• Price: Compare bids for total installed cost, but remember we often get what we pay for so look closely at each contractor.
• Referrals: Ask friends and neighbors who they recommend.
• References: Ask the roofing contractor for past customers, and call them.
• Complaints: Check the Better Business Bureau.
• Licenses: Ask about all appropriate state and local licenses.
• Insurance: Ask to see the contractor's liability and worker's compensation insurance policies.
• Experience: How many years has the contractor been in business? Drive by some nearby homes the contractor roofed or is roofing to see if the roofs look even and neat.
• Crews: it’s generally better if the roofer uses his own crews instead of subcontracting to outside roofers.
• Associated Recommendations: Be certain all bids include the same work. Often, the roofer should be repairing or replacing other components like gutters, down spouts, and flashing.
• Bids: Make sure all bids are in writing with costs for roofing, materials, and associated work (above) all listed separately. Bids should also contain timetables for starting and finishing the work. Any change from the original bid may add additional costs.
• Building Code Requirements: When considering a new roof, you should check with your local building department about local building codes require.
• Qualified Contractors: Boral Roofing can supply you with a list of qualified licensed and insured roofing contractors.
How do I choose the right roofing material? Not all roofing materials are created equal. Roofing materials have a wide range of features and benefits which affect your roof's appearance and performance so consider these factors before you buy.
• Fire Resistance: Roofing materials are rated from Class A (the best fire resistance) to Class C (the lowest). These ratings can even affect insurance costs.
• Durability: Be sure to investigate how well each roofing material stands up to weather and maintenance.
• Life Expectancy and Warranty: Ask to see the manufacturer's written warranty for materials and the contractor's warranty for labor before you make a commitment.
• Life Cycle Cost and Value: Look at more than the initial cost. Consider the cost of the roof over the entire period of the warranty.
• Appearance and Color Options: Since the roof is one of the most visible parts of your home select a roof that will make you happy for a long time.
• Weight of the Roofing Materials: For a typical 30 square reroof project, a standard weight roof tile, at over 9.5 lbs per square foot, can add up to 10,800 lbs to the weight of the roof. Whenever reroofing make sure your contractor reviews the structural requirements needed to safely support the weight of the roofing materials.
What happens when my home is roofed with clay tile? Here's the roofing process with clay tile. Similar steps will be followed for other roofing materials. If you decide not to use long life, fire-resistant, freeze thaw resistant clay tile, you should check the manufacturer and contractor for complete information.
• Tear Off: If you are reroofing your home, the first step is to remove your old roof. With asphalt shingles and wood shakes, large shovels are used to pry up the shingles and roofing felt beneath them. This should be immediately disposed of in a truck or container. Make sure the crew picks up all small scraps and nails or staples.
• Deck Repair: Once the old roof has been removed down to the wood deck, the roofers should repair any split or missing decking.
• Roof Preparation: Roofers will next install new underlayment roofing felt. New metal flashing is also applied.
• Tile Installation: Once the tiles are loaded onto the roof, the roofer installs them on a pre caulked line and nails them in place. Tiles are cut to fit valleys, hips, sidewalls, etc.
• Clean Up: Never make final payment until the roof, yard, and driveway are cleaned up and all materials and tools removed from your property.
• Final Inspection: Walk around your home and check that everything is cleaned up and completed. Visually check that the entire roof is covered (no gaps or spaces), gutters and down spouts connected, and flashing (metal) is in place wherever the roof meets a vertical wall. Try to look at the roof from a ladder or even from neighbors' windows. Do not attempt to go on the roof as it is always dangerous.
• Problems: If you detect any leaks or missing tiles, immediately call your roofing contractor to prevent water damage and further roof problems.
How are ProShake / ProSlate tiles made? The raw clays are mixed to a fine consistency, extruded through a high pressure pug mill into a slug, which are then pressed at high pressure into the custom molds and placed on ceramic trays. At this point the tile has its shape. From the wood shake profile to the high definition texture to the elevated nail holes. The tiles are then dried with a combination of heat and humidity. Once dried they are kiln fired to temperatures exceeding 1900 degree. The tiles are then removed from the trays and packaged. The system is highly automated with people overseeing the quality of the tiles through each stage of production.
Can my roofer use Orientated Strand Board (OSB) as a roof deck under a tile roof? In 2000 a major study was undertaken by the Engineered Wood Products Association (APA) to determine the structural integrity equivalency to similar thicknesses of plywood. In most building department jurisdictions outside of Florida, the structural performance characteristics allow OSB to be used in place plywood. Due to Florida's extreme climatic conditions different building departments do not allow OSB due to the fastener withdrawal values, so please check with your local building department for their requirements.
What is the minimum slope of a tile roof? The minimum slope is 2:12. At less than a 4:12 slope, the roof tile is decorative only and must be installed over solid sheeting over a code-complying roof covering.
How much does the installation cost? The installed cost for Boral Roofing products will vary contractor to contractor, roof to roof, and homeowner to homeowner. I have several installers who are competitively installing ProShake at $500.00 per square. The same contractor, however, has recently secured a contract for ProShake on very steep and difficult roof at $900.00 per square. The difficulty of the roof plan, access to the roof, city codes, and seasonal material fluctuations will also affect the re-roof bid.
Why don’t we offer Rake tiles for ProShake / ProSlate? It is our intention to stay true to the 'shake install' where a finished shake installed look is preferred. We do recommend a metal drip edge and a urethane plug to go beneath the cut tiles for additional weatherproofing. The second option is a rake metal closure. This application is cleaner, and crisper than the saw toothed edge that is common with the typical shake application.
What is the best solution to use for cleaning roof tile? Common household bleach at no more than 1% strength should kill most of the algae spores. However, make sure any water runoff is diverted from sensitive plants or foliage and their root systems.