The building official may permit the re-covering of existing roofing based on the condition of the roof and the type of roof to be applied if the following general rules are applied: The Building Official may allow existing roof coverings to remain when inspection reveals all of the following conditions: That the roof structure is sufficient to sustain the weight of the additional dead load of the roof covering.

Should you remove your current roof before installing another? Although the advantages to leaving your old shingles are obvious (cheaper, less labor, faster), unless the initial roof is a single, problem-free layer, you could be setting yourself up for trouble. The new roof is of a lighter material than the original roof. If you put lightweight shingles over heavyweight shingles, all of the old bumps and ridges from the original roof will still show.

with most roofing products, the best installation comes from tearing off the existing roof. This is what we recommend for DaVinci products. However, it is not a requirement. DaVinci Slate and Shake can be laid over an existing roof if the situation meets generally accepted industry criteria and local building codes.

Murray Shaw Inc. highly recommends the removal of the old roofing material before installing new asphalt shingles. The removal allows a professional to inspect the condition of the existing wood deck and all related roofing components to find any defects so that they can be fixed. Once all repairs are done, new shingles can be installed evenly and effectively.

Yes, but the preferred method is removal. The Uniform Building Code allows two (2) roofs on commercial (flat) buildings and three (3) roofs on residential(steep) buildings. Removal allows for inspection of the substrate, and the elimination of any wet, rough, and/or unstable existing materials.

Yes! In most cases, if a roof is sound, and local codes permit it, we can utilize existing structures such as carports, breezeways and porches.

TPO is not the cure all for all roof problems. Good roofing practices still apply when considering even a tough TPO membrane. Any wet insulation in the existing roof system should be removed prior to ANY new roof system installed, including TPO. But once all the existing insulation and decking has been inspected and approved, a TPO system can be installed after an insulation board has been applied over an existing built up roof system or other single ply membrane.

If you are committed to your home for years into the future, a metal roof will offer you much greater value and a lower life-cycle cost than the most common and inexpensive roofing products, even though the initial cost seems higher. This is because you will not need to replace this roof for 50 years or more, whereas on average, asphalt shingle roofs are being replaced every 15 years. We like to say that a metal roof is "the last roof you'll ever have to buy."

In most cases a metal roof can be installed over composition roofing materials. The condition of the roofing substructure will be a factor and the building codes in your area will dictate the number of roofing layers allowed. Because of its light weight, relative to all other roofing systems, many local codes will allow installation of a metal roof over multiple roofing layers where other systems would be prohibited.

with any roofing product, the best procedure to use when re-roofing is to tear off the existing roof and use industry approved underlayments to assure the best performance over the life span of the roof. But this can be done. It will not affect the material warranty, but it will affect the wind and fire ratings. So usually the benefits of tearing off out weigh going over an existing roof.

No. You should remove all existing ridge caps, then apply a water proof strip of felt, metal, fastener-sealing eave protection to ensure that the ridges or hips are water tight. Finally, install the new ridge caps.

It has been happening before and it did happen before the new roof. The difference this time was that we had constant subzero temperatures for two weeks and we had more snowfall during the same two weeks than we [in Toronto], have [recently] been used to in a whole winter. It has absolutely nothing to do with a new roof this year - as long as Building Code standards were met or exceeded.

In most applications over asphalt shingles, our metal roofing can be applied over the old roof with 30lb felt underlayment or 1'x4' lathing boards installed between the existing roof and the new metal roof. This saves money and time. In addition, because there is no old roof to remove, landfill space is spared, helping to protect our environment.

We are pleased to confirm that we will be covering the forthcoming season. For more schedule information closer to the start of the season, please check our TV listings.

Rustic Shingle is designed to be installed directly over worn out asphalt, fiber glass or wood shingle roofs to provide long lasting, weather tight protection. This eliminates the time, cost and mess a complete tear-off would require. The light weight of aluminum does not add any significant weight load to the house, unlike most other products. However, in same rare cases the old material may need to be removed to allow a secure installation of Rustic Shingle.

Note that the weights for cedar, clay and concrete products are all dry weights. All three-product categories weights increase when wet .

The system can also be installed on a bracket on a south facing wall, close to the bathrooms. However, the installation is difficult and leads to extra cost. The fixing of the system to the bracket should be proper. Access to the system for repairs should also be ensured. Cost of hot water distribution piping could be reduced in such installations as the system will be close to the use point.

Multiple roofing layers tend to decrease a roof's resistance to hail. Make sure to check local building codes, as some building codes and ordinances restrict the number of roofing layers a house may have. Another issue to consider with wood shingles when applying a new roof over the wood shingles is possible fungus problems. Installation of metal products over existing wood shingles is common as long as proper cuts for ventilations are observed.

Installing a roof over the top of an existing roof is generally acceptable under these guidelines: 1) A building cannot have more than two roofs; 2) No wet insulation can be left in place; 3) The roof structure must be able to handle the additional roof load; 4) The new roof must be attached to the roof deck to meet wind loads (it is not generally acceptable to adhere the new roof to the old roof)

Yes. Springhouse Shingles can be installed over your existing asphalt roof thereby eliminating expensive tear off and disposal fees.

For pre-existing conditions we recommend Shingle Shield Roof Cleaner, which is specifically designed to clean roofs prior to application of the roof protector strips. Other cleaning solutions may not be effective against these organisms, and may harm your roof or plants.

Because of the tremendous number of variables involved, we prefer to not be involved in adding on to existing structures.

We can't provide you with an estimate online. However, Butler Builders® and Roof Dealers are independent contractors authorized by Butler Manufacturing Company to distribute our products and services. They specialize in utilizing Butler® roof systems in reroof and new construction applications. These systems include reroofing over existing metal and nonmetal roofs, slope-enhancing framing systems, and architectural standing-seam roofs.

Rustic Shingle installation requires a minimum pitch of 3 in 12. The product is often installed over existing roofs without a tear-off. Your Rustic Shingle dealer can determine if your roof, like most, is suitable for a Rustic Shingle roof-over. Of course, Rustic Shingle is perfect for new construction too, requiring solid decking and 30# felt underlayment.

Yes, this is entirely possible. Temperature control is the issue. You can use one of our heat exchanges to change the steam to hot water. Then you can use a mixing valve to control temperature of the hot water. You may want to consider the use of a safety control.

Although there are rare exceptions to the rule, most solar panels are either bolted to or mounted on the existing roofing material and must be removed before a new roof can be installed. Because solar panels are charged using a type of antifreeze, they will have to be removed and reinstalled by a licensed plumber who can insure that the job is accomplished properly.

To get a new line installed or change an existing phone line, visit http://nts-services.umd.edu/order-requests or contact the OIT-NTS Service Desk at 301.405.4400 and request a copy of the Telecommunications Services Equipment Request form.

yes! absolutely! it may be more common to install a central vacuum system in new construction or during a major remodeling, but it is quite simple to install in an existing home.

Yes. The Fire-Link system is designed to be a supplemental accessory to an existing fire alarm system to enhance signaling capabilities. However, it can also be used in conjunction with a new or upgraded fire alarm system installation. Under ULC-S545 and UL 985, it can be used in large residential applications as a fire alarm system. However, it cannot be used as both an 'Accessory' and a fire panel with detection devices in the same application.

Has the issue of "cutoff" been discussed? A "full-cutoff" fixture is one that, basically, doesn't project light upward above its own level. (That ensures energy isn't wasted lighting the night sky).