There are many different roof systems available in today's market, each with numerous strengths and weak points. Below I will certainly describe each system briefly, then list the cons and pros.
Thermoplastic and PVC- Single ply, could be mechanically attached, completely ballasted or stuck.
Pros- Superior performance in ponding water situations. Extremely light-weight roofs, in the community of 30lbs. each 100 sq. ft. Comes in white if a cool roof is preferred, or in a number of various colors for visual problems. One more plus with these roofs is that large custom made field sheets can be bought from the manufacturing facility, minimizing seams sealed by the crew on the jobsite. Resistant to algae, ozone and area joints are 3-4 times more powerful compared to EPDM submitted joints. There is additionally an incredible quantity of adaptability in the product. And given that joints could be bonded with warm air, there are no poisonous fumes to deal with. Both 15 and 20 year warranties available.
Cons- Being solitary ply, they are prone to thrown out cigarettes, sharp objects dropped on the membrane, and broken glass from bottles tossed on roof (this happens a LOT) I typically discourage clients from setting up these sorts of systems if the roof has a great deal of foot website traffic or is quickly accessible to unauthorized workers. In the past, material contraction was at times an extreme trouble on Thermoplastic and PVC roofs, yet modifications in composition and manufacturing has actually alleviated this issue. These roofs still shrink in time, though not to the point of failing as in the past.
Bottom line- Great roof coverings, particularly on roofs that pond water greatly, as long as the roof is generally obtainable only to licensed employees.
Asphalt Modified Bitumen- This roof is exactly what a great deal of individuals call a rubber roof, when it is in truth made up primarily of asphalt. It can be found in 3 ft. broad rolls and is normally torched with an open flame, though they can be used with warm air welders in particular conditions as well.
Pros- In my viewpoint, the greatest toughness of these roofing systems is exactly how well they take on outdoors stresses. They deal with foot web traffic far better compared to other membrane layer, and are difficult to puncture, particularly if they have a granulated surface. These roofings are so challenging in fact, that many insurance provider will not even acknowledge hail storm damage as they do on other roofing systems (I have personally seen modified roofing systems absolutely pummeled with hail and appear completely undamaged).
Cons- The most obvious negative aspect with these systems is that there is a seam every 3 feet, which makes for a LOT of joints. If you have a persistent staff with an experienced foreman who will make certain that every seam on the roof is triple inspected, you'll probably be fine with this system.
Profits- With an excellent, seasoned staff this can be a great roof on a building that does not pond water excessively. And if you have a building with a lot of roof foot web traffic, this is most likely the only means to go.
Foam roof coverings- This system is used with a huge spray system, splashing two liquid elements (isocyanate and resin) When the fluids are blended with each other, they broaden 20-30 times and will certainly abide by concrete, timber, steel and most present roof systems, yet inning accordance with the suppliers, NOT to customized asphalt.
Pros- When total, the roof is monolithic with no seams, fully stuck and has insulating buildings.
Disadvantages- Full disclosure, I have actually restricted experience with these roof coverings here in NE Illinois. We do not install them, yet I have actually gotten on 9-10 buildings with this system, and all of them leaked severely, in a few situations within months of being mounted. Leakages are extremely difficult to locate and hard to fix even when located, as repair materials don't stick to this surface area very well.
Profits- Based on my unquestionably minimal experience with this system, I would certainly not suggest my customers to go this course when a brand-new roof is required.
EPDM Rubber- Rubber roofings can be completely adhered, mechanically weighed or fastened with ballast (Riverbed crushed rock or pavers) They are flexible, proper for numerous installations and have a long record.
Pros- Rubber roof coverings are fairly low-cost, simple to fix and set up. They are available in large sheets to decrease the variety of field joints, and there is fairly little bit of flexibility in the membrane layer.
Disadvantages- Field seams on these roof coverings are not as solid as Thermoplastic roofing systems. Flashings and roof sides tend to wear out quicker compared to the rest of the roof. Shrinking over long periods could be dramatic in some applications.
Profits- Can be a great financial investment for a structure proprietor, but every one of the situations of an offered installation has to be very carefully weighed. And great craftsmanship on the mount is vital.
Spray used roofing- These are not technically re-roofs, they are taken into consideration finishings. Some firms refer to them as "re-plys", as you are essentially including a ply to the existing roof surface. There countless manufacturers using various items with various compositions and requirements, too many to enter into totally here. If an existing roof is experiencing leakages but has actually not advanced to the point of straight-out failing, them may ready candidates for this remedy.
Pros- Can be incredibly economical, particularly on roofings that have a great deal of estimates and rooftop HVAC systems. The product is pure white, which in some cases (especially on metal roofs) can drastically lower Air Conditioner air conditioning expenses. As this is taken into consideration to be roof fixings as opposed to a brand-new roof, there are tax advantages as well.
Cons- The existing roof must still be in rather respectable problem. Some producers do not warranty this material if there is ANY ponding water on the roof.
Profits- This solution could save a structure proprietor a lot of cash, if the existing roof remains in sufficient condition to approve the coating. Outstanding service for metal roofs specifically.
As you can see, there are several remedies to your flat roofing needs. It is crucial nonetheless to choose a roofer who will recommend the very best system for your specific roof and conditions, and not the best option for his budget. 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 solitary ply, they are susceptible to disposed of cigarettes, sharp items dropped on the membrane, and broken glass from bottles thrown on roof (this happens a LOT) I generally inhibit consumers from mounting these kinds of systems if the roof has a whole lot of foot web traffic or is easily available to unauthorized employees. These roofings are so hard in fact, that most insurance companies will not also recognize hail storm damage as they do on various other roofing systems (I have actually website personally seen customized roofing systems absolutely pummeled with hail storm and come out completely intact).
Disadvantages- Field seams on these roofs are not as solid as Thermoplastic roofing systems. Flashings and roof edges often tend to use out more promptly than the remainder of the roof. As this is taken into consideration to be roof repair services rather than a brand-new roof, there are tax obligation advantages.