There are several roof systems readily available in today's market, each with different strengths and weaknesses. Listed below I will describe each system briefly, then note the disadvantages and pros.
Thermoplastic and PVC- Single ply, can be mechanically attached, completely ballasted or adhered.
Pros- Superior efficiency in ponding water situations. Extremely light-weight roofing systems, in the area of 30lbs. per 100 sq. ft. Comes in white if an amazing roof is desired, or in a number of different colors for visual problems. One more plus with these roofs is that big customizeded field sheets can be bought from the manufacturing facility, decreasing seams secured by the staff on the jobsite. Immune to algae, area and ozone joints are 3-4 times stronger compared to EPDM submitted seams. There is additionally an incredible quantity of adaptability in the material. And because joints could be bonded with warm air, there are no toxic fumes to deal with. Both 15 and 20 year warranties offered.
Disadvantages- Being solitary ply, they are prone to disposed of cigarettes, sharp items dropped on the membrane, and busted glass from containers thrown on roof (this happens a LOT) I generally dissuade clients from mounting these sorts of systems if the roof has a lot of foot traffic or is easily obtainable to unapproved workers. In the past, product shrinkage was at times a severe problem on Thermoplastic and PVC roofing systems, but modifications in make-up and production has alleviated this concern. These roofs still shrink in time, though not to the factor of failing as in the past.
Profits- Great roofing systems, particularly on roofings that pond water heavily, as long as the roof is usually accessible only to authorized personnel.
Asphalt Modified Bitumen- This roof is what a lot of people call a rubber roof, when it is in truth made up mainly of asphalt. It comes in 3 ft. vast rolls and is generally torched down with an open fire, though they could be used with warm air welders in specific conditions.
Pros- In my viewpoint, the greatest stamina of these roofing systems is how well they stand up to outside stress and anxieties. They take care of foot web traffic better compared to any other membrane layer, and are difficult to puncture, specifically if they have a granulated surface area. These roof coverings are so difficult actually, that many insurance provider will not also identify hail damage as they do on other roofings (I have actually directly seen customized roofs definitely pummeled with hail and appear completely intact).
Disadvantages- The most glaring disadvantage with these systems is that there is a joint every three feet, which makes for a LOT of seams. If you have an attentive team with a qualified foreman that will certainly guarantee that every joint on the roof is triple checked, you'll possibly be fine with this system.
Profits- With a great, experienced crew this can be an excellent roof on a structure that does not pond water excessively. And if you have a building with a great deal of rooftop foot traffic, this is possibly the only way to go.
Foam roofs- This system is applied with a huge spray unit, splashing two liquid parts (isocyanate and resin) When the fluids are blended with each other, they expand 20-30 times and will certainly stick to concrete, wood, steel and most existing roof systems, yet according to the suppliers, NOT to customized asphalt.
Pros- When complete, the roof is monolithic without any joints, fully stuck and has insulating residential or commercial properties.
Disadvantages- Full disclosure, I have limited experience with these roof coverings here in NE Illinois. We don't mount them, however I have gotten on 9-10 buildings with this system, and all of them dripped terribly, in a number of cases within months of being set up. Leakages are extremely hard to find and hard to fix even when located, as repair service products do not follow this surface extremely well.
Bottom line- Based on my undoubtedly minimal experience with this system, I would certainly not advise my more info clients to go this route when a new roof is needed.
EPDM Rubber- Rubber roofing systems can be completely adhered, mechanically evaluated or secured down with ballast (Riverbed gravel or pavers) They are versatile, proper for lots of setups and have a lengthy performance history.
Pros- Rubber roofings are fairly inexpensive, very easy to fix and set up. They are available in large sheets to minimize the variety of area seams, and there is quite bit of flexibility in the membrane.
Disadvantages- Field joints on these roofings are not as strong as Thermoplastic roofs. Flashings and roof sides have the tendency to wear more quickly compared to the rest of the roof. Shrinking over long periods could be remarkable in some applications.
Bottom line- Can be a good financial investment for a structure owner, but every one of the scenarios of a provided installation has to be very carefully weighed. And great handiwork on the set up is vital.
Spray used roofing- These are not technically re-roofs, they are considered coatings. Some business refer to them as "re-plys", as you are basically including a ply to the existing roof surface. There are numerous suppliers using various items with various structures and specification, as well numerous to enter into totally right here. Them might be excellent candidates for this service if an existing roof is experiencing leakages but has not progressed to the point of straight-out failure.
Pros- Can be incredibly affordable, particularly on roof coverings that have a lot of projections and rooftop HVAC systems. The product is pure white, which in many cases (especially on metal roofing systems) could substantially reduce Air Conditioning air conditioning prices. As this is considered to be roof repair work instead of a new roof, there are tax advantages also.
Cons- The existing roof has to still be in somewhat suitable condition. Some manufacturers do not guarantee this material if there is ANY ponding water on the roof.
Profits- This solution might conserve a building proprietor a great deal of cash, if the existing roof remains in good enough problem to accept the layer. Exceptional solution for metal roof coverings particularly.
As you could see, there are many different options to your level roofing needs. It is crucial however to select a roofer that will certainly recommend the most effective system for your certain roof and situations, and not the most effective option for his pocketbook. Be sure you recognize why a roofer is suggesting a specific system for your task, and which system will certainly be the best financial investment for you.
Disadvantages- Being single ply, they are at risk to discarded cigarettes, sharp items dropped on the check here membrane, and damaged glass from bottles thrown on roof (this occurs a LOT) I usually discourage clients from installing these types of systems if the roof has a whole lot of foot traffic or is quickly obtainable to unapproved employees. These roofs are so hard in truth, that the majority of insurance coverage companies won't even identify hail damage as they do on other roofing systems (I have actually directly seen modified roofing systems definitely mauled with hailstorm and come out totally undamaged).
Cons- Field joints on these roof coverings are not as solid as Thermoplastic roofings. Flashings and roof here edges tend to wear out extra promptly compared to the remainder of the roof. As this is considered to be roof repairs instead than a brand-new roof, there are tax benefits.