There are various roof systems readily available in today's market, each with various strengths and weak points. Below I will certainly describe each system briefly, then list the benefits and drawbacks.
Thermoplastic and PVC- Single ply, can be mechanically affixed, fully ballasted or stuck.
Really light-weight roof coverings, in the area of 30lbs. An additional plus with these roof coverings is that big custom-made made field sheets can be ordered from the factory, decreasing joints sealed by the staff on the jobsite. Immune to area, algae and ozone seams are 3-4 times stronger compared to EPDM filed seams.
Disadvantages- Being single ply, they are vulnerable to discarded cigarettes, sharp things dropped on the membrane, and busted glass from bottles thrown on roof (this occurs a LOT) I typically prevent clients from installing these sorts of systems if the roof has a lot of foot website traffic or is quickly accessible to unapproved workers. In the past, product shrinking was at times an extreme problem on Thermoplastic and PVC roof coverings, however changes in make-up and manufacturing has actually ameliorated this issue. These roofings still diminish gradually, though not to the factor of failure as in the past.
Bottom line- Great roofings, specifically on roofings that pond water heavily, as long as the roof is normally accessible only to authorized employees.
Asphalt Modified Bitumen- This roof is what a lot of individuals call a rubber roof, when it remains in truth composed primarily of asphalt. It comes in 3 ft. vast rolls and is typically torched down with an open fire, though they could be applied with warm air welders in specific problems.
Pros- In my opinion, the largest strength of these roofings is how well they withstand outdoors stress and anxieties. They deal with foot web traffic much better compared to any other membrane, and are hard to puncture, especially if they have a granulated surface. These roofings are so hard actually, that the majority of insurance companies won't also identify hail storm damages as they do on other roof coverings (I have actually directly seen changed roof coverings definitely mauled with hailstorm and come out totally undamaged).
Disadvantages- The most glaring disadvantage with these systems is that there is a seam every three feet, that makes for a LOT of seams. If you have a persistent crew with a competent supervisor that will make certain that every seam on the roof is three-way examined, you'll possibly be fine with this system. Otherwise, you could be quite sure you will certainly wind up with leaks rather soon, well before the service warranty ends in my experience. And large ponding areas of water on these systems will certainly degrade the product too soon.
Profits- With an excellent, knowledgeable crew this could be an excellent roof on a building that does not pond water exceedingly. And if you have a building with a great deal of rooftop foot web traffic, this is possibly the only way to go.
Foam roof coverings- This system is applied with a big spray device, spraying 2 fluid components (isocyanate and resin) When the fluids are blended together, they broaden 20-30 times and will certainly adhere to concrete, wood, steel and most present roof systems, but according to the manufacturers, NOT to modified bitumen.
Pros- When full, the roof is monolithic without joints, fully adhered and has insulating residential properties.
Disadvantages- Full disclosure, I have actually limited experience with these roofings here in NE Illinois. We don't install them, but I have actually gotten on 9-10 structures with this system, and all of them leaked badly, in a couple of cases within months of being set up. Leaks are extremely challenging to find and tough to deal with even when website found, as repair products don't adhere to this surface extremely well.
Bottom line- Based on my unquestionably minimal experience with this system, I would certainly not recommend my customers to go this course when a new roof is required.
EPDM Rubber- Rubber roofing systems could be totally stuck, mechanically secured or considered down with ballast (Riverbed gravel or pavers) They are functional, ideal for numerous setups and have a long record.
Pros- Rubber roofs are reasonably cost-effective, very easy to repair and mount. They are offered in big sheets to minimize the variety of field joints, and there is fairly bit of flexibility in the membrane.
Cons- Field seams on these roof coverings are not as solid as Thermoplastic roofs. Flashings and roof sides have the tendency to break faster than the rest of the roof. Contraction over extended periods could be remarkable in some applications.
Bottom line- Can be a good financial investment for a structure proprietor, but all the circumstances of a given installation needs to be thoroughly considered. And great handiwork on the install is important.
Spray used roofing- These are not technically re-roofs, they are considered coverings. Some business describe them as "re-plys", as you are basically including a ply to the existing roof surface. There many manufacturers using numerous products with different compositions and spec, also numerous to go into totally here. If an existing roof is experiencing leakages but has not advanced to the factor of straight-out failure, them may ready prospects for this remedy.
Pros- Can be incredibly affordable, particularly on roofings that have a lot of projections and rooftop HVAC systems. The product is pure white, which in some cases (especially on steel roof coverings) could dramatically reduce Air Conditioning cooling costs. As this is thought about to be roof repair work rather than a new roof, there are tax obligation benefits also.
Disadvantages- The existing roof should still be in rather decent condition. Some suppliers do not service warranty this material if there is ANY ponding water on the roof.
Bottom line- This remedy could conserve a building owner a great deal of money, if the existing roof is in adequate problem to accept the finish. Excellent service for steel roof coverings in particular.
As you can see, there are various remedies to your flat roofing needs. It is important nevertheless to pick a roofer that will certainly recommend the most effective system for your certain roof and circumstances, and not the very best option for his purse. Be sure you understand why a roofer is suggesting a certain system for your task, and which system will certainly be the most effective financial investment for you.
Disadvantages- Being single ply, they are prone to disposed of cigarettes, sharp items went down on the membrane, and damaged glass from bottles thrown on roof (this happens a LOT) I generally discourage customers from installing these kinds of systems if the roof has a whole lot of foot website traffic or is conveniently available to unauthorized workers. These roofing systems are so tough in fact, that most insurance policy business won't also identify hailstorm damages as they do on other roofing systems (I have actually directly seen modified roofs definitely pounded with hail and come out entirely intact).
Cons- Field joints on these roofings are not as strong as Thermoplastic roofing systems. Flashings and roof sides often tend to put on out extra swiftly than the rest of the roof. As this is thought about to be roof repair work instead compared to a brand-new roof, there are tax obligation benefits.