There are many different roof systems readily available in today's market, each with different strengths and weaknesses. Listed below I will define each system briefly, and after that detail the advantages and disadvantages.
Thermoplastic and PVC- Single ply, can be mechanically connected, totally ballasted or adhered.
Pros- Superior efficiency in ponding water scenarios. Very light-weight roof coverings, in the area of 30lbs. per 100 sq. ft. Comes in white if a cool roof is desired, or in a number of various shades for aesthetic worries. An additional plus with these roofing systems is that big customizeded area sheets could be gotten from the factory, reducing seams sealed by the staff on the jobsite. Resistant to ozone, area and algae joints are 3-4 times more powerful compared to EPDM filed seams. There is likewise a tremendous amount of flexibility in the material. And considering that joints could be welded with hot air, there are no harmful fumes to take care of. Both 15 and 20 year guarantees offered.
Disadvantages- Being solitary ply, they are at risk to thrown out cigarettes, sharp things went down on the membrane, and damaged glass from containers thrown on roof (this occurs a LOT) I typically prevent clients from installing these sorts of systems if the roof has a great deal of foot traffic or is easily obtainable to unapproved workers. In the past, material shrinkage went to times a severe trouble on Thermoplastic and PVC roofings, but adjustments in structure and production has relieved this problem. These roofs still shrink in time, though not to the factor of failing as in the past.
Bottom line- Great roofs, particularly on roofing systems that pond water heavily, as long as the roof is generally available just to authorized personnel.
Asphalt Modified Bitumen- This roof is just what a great deal of people call a rubber roof, when it is in reality composed mostly of asphalt. It is available in 3 ft. broad rolls and is generally torched with an open fire, though they could be applied with hot air welders in particular conditions also.
Pros- In my viewpoint, the largest toughness of these roofing systems is exactly how well they take on outdoors tensions. They deal with foot web traffic better compared to any other membrane, and are hard to puncture, specifically if they have a granulated surface area. These roofs are so tough as a matter of fact, that a lot of insurer will not also acknowledge hailstorm damages as they do on other roof coverings (I have actually directly seen changed roofs absolutely mauled with hailstorm and appear entirely intact).
Cons- The most obvious drawback with these systems is that there is a seam every 3 feet, which makes for a LOT of seams. If you have an attentive team with a skilled supervisor who will make sure that every joint on the roof is triple checked, you'll probably be fine with this system.
Profits- With a good, knowledgeable staff this could be a great roof on a building that does not pond water excessively. And if you have a structure with a great deal of rooftop foot traffic, this is possibly the only way to go.
Foam roofs- This system is applied with a big spray system, spraying two liquid parts (isocyanate and resin) When the liquids are blended together, they expand 20-30 times and will certainly follow concrete, timber, steel and most current roof systems, yet inning accordance with the makers, NOT to customized asphalt.
Pros- When total, the roof is monolithic without any joints, totally stuck and has insulating buildings.
Cons- Full disclosure, I have limited experience with these roofing systems here in NE Illinois. We do not mount them, yet I have actually been on 9-10 buildings with this system, and all of them leaked terribly, in a few situations within months of being mounted. Leaks are really difficult to locate and hard to fix even when found, as repair materials do not follow this surface area very well.
Profits- Based on my unquestionably limited experience with this system, I would not encourage my customers to go this path when a brand-new roof is needed.
EPDM Rubber- Rubber roofs can be fully adhered, mechanically fastened or weighed with ballast (Riverbed gravel or pavers) They are versatile, appropriate for many installments and have a lengthy performance history.
Pros- Rubber roofing systems are reasonably cost-effective, very easy to set up and repair. They are available in large sheets to reduce the number of area seams, and there is fairly little bit of flexibility in the membrane layer.
Cons- Field joints on these roof coverings are not as strong as Thermoplastic roofing systems. Flashings and roof sides have the tendency to wear quicker compared to the remainder of the roof. Contraction over long periods could be remarkable in some applications.
Profits- Can be a great investment for a structure owner, but all the conditions of a given installment must be carefully considered. And good craftsmanship on the set up is vital.
Spray applied roofing- These are not practically re-roofs, they are considered finishes. Some companies describe them as "re-plys", as you are essentially including a ply to the existing roof surface. There countless makers offering various products with different make-ups and spec, too various to enter into totally here. If an existing roof is experiencing leaks yet has not advanced to the point of straight-out failing, them may be good candidates for this option.
Pros- Can be extremely inexpensive, particularly on roof coverings that have a great deal of estimates and roof HVAC devices. The product is pure white, which in some cases (particularly on metal roofs) can drastically minimize AC cooling costs. As this is considered to be roof repairs rather than a brand-new roof, there are tax obligation benefits too.
Disadvantages- The existing roof has to still be in somewhat suitable condition. Some producers do not service warranty this product if there is ANY ponding water on the roof.
Profits- This solution might conserve a structure owner a great deal of money, if the existing roof is in adequate problem to approve the finish. Exceptional remedy for steel roofing systems particularly.
As you can see, there are many different options to your level roofing needs. It is important nevertheless to select a roofer that will certainly recommend the most effective system for your particular roof and situations, and not the very best option for his pocketbook. Make certain you understand why a roofer is recommending a particular system for your project, and which system will be the best investment for you.
Cons- Being solitary ply, they are vulnerable more info to discarded cigarettes, sharp things went down on the membrane layer, and busted glass from containers thrown on roof (this occurs a LOT) I typically dissuade customers from installing these types of systems if the roof has a whole lot of foot website traffic or is conveniently available to unauthorized personnel. These roofs are so tough in fact, that most insurance policy firms won't even identify hail storm damage as they do on various other roof coverings (I have actually directly seen modified roofs definitely pounded with hail storm and come out totally undamaged).
Disadvantages- Field joints on these roofings are not as strong as Thermoplastic roofing systems. Flashings and roof sides have a tendency to put on out more quickly compared to the rest of the roof. As this is taken into consideration to be roof fixings rather than a brand-new roof, there are tax advantages.