There are several different roof systems available in the present market, each with a variety of strengths and flaws. Below I will explain each system temporarily, then listing the advantages and disadvantages.
Thermoplastic and PVC- Single ply, may be automatically attached, completely stuck or ballasted.
Experts- Superior functionality in ponding water circumstances. Very lightweight roofs, in the area of 30pounds) Per 100 sq. ft. Comes in white when a cool roof is wanted, or in many distinct colours for aesthetic issues. Another and all these roofs is that big custom made area sheets could be purchased from the mill, minimizing seams sealed from the team on the jobsite. Resistant to ozone, algae and area pits are 3-4 times more powerful than EPDM registered pits. There’s also a tremendous quantity of flexibility in this substance. And because shingles may be welded with warm atmosphere, there are no poisonous fumes to take care of. The two 15 and 20 year warranties available.
Disadvantages- Being single ply, they’re vulnerable to lost smokes, sharp items dropped onto the membrane, and broken glass from bottles thrown roofing (this happens a LOT) I normally discourage customers from installing these kinds of systems when the roof has a great deal of foot traffic or is readily available to unauthorized personnel. Before, material shrinkage has been sometimes a serious problem on Thermoplastic and PVC roofs, but changes in makeup and production has ameliorated this matter. These roofs still shrink over time, even although not to the point of collapse as previously.
Bottom line- Good roofs, particularly on roofs which pond water provided that the roof is usually available only to authorized personnel.
Asphalt Modified Bitumen- This roofing is exactly what lots of individuals call a rubber roof, even as it is actually written chiefly of asphalt. It comes in 3 ft. wide rolls and is ordinarily torched down having an open fire, although they may be implemented with hot air welders in some specific conditions too.
Experts- In my estimation, the biggest advantage of those roofs is how well they stand up to external pressures. They manage foot traffic greater than every other tissue, and also therefore are difficult to puncture, particularly if they have a granulated surface. These roofs are so hard in Actuality, that many insurers won’t even realize hail harm as they do on other roofs (I’ve personally noticed altered roofs completely pummeled with hail and emerge entirely undamaged)
Disadvantages- The glaring drawback with all these systems is that there’s a seam each 3 feet, making for a great deal of seams. In case you’ve got a diligent team with a capable foreman that will make certain that each and every seam on the roofing is triple checked, you will most likely be good with this method. Otherwise, you can be fairly certain you are going to wind up with leaks rather shortly, well until the guarantee expires in my expertise. And big ponding regions of water on those systems will irritate the substance.
Bottom line- Using a great, experienced team this is sometimes a fantastic roof on a construction that doesn’t pond water too. And in case you’ve got a building with a great deal of rooftop foot traffic, then this is most likely the only thing to do.
Foam roofs- This method is implemented with a massive spray device, spraying on two liquid parts (isocyanate and resin) Once the liquids are mixed together, they enlarge 20-30 occasions and will adhere to concrete, timber, steel and many existing roofing systems, however in accordance with the producers, NOT to modified bitumen.
Experts- Once complete, the roofing is monolithic without the seams, completely stuck and contains insulating properties.
Disadvantages- Full disclosure, I have limited experience with those roofs in NE Illinois. We do not install them but I have been around 9-10 buildings using this method, and all them leaked badly, at a few instances within weeks of being installed. Leaks are extremely tricky to monitor and hard to mend even when detected, as fix materials do not stick to the surface quite well.
Bottom line- According to my admittedly limited experience on this particular system, I wouldn’t advise my customers to go this path every time a new roof is necessary.
EPDM Rubber- Rubber roofs may be completely adhered, mechanically secured or narrowed with ballast (Riverbed gravel or pavers) They’re flexible, suitable for several installations and also have a very long history.
Experts- Rubber roofs are rather inexpensive, simple to set up and fix. They can be found in massive sheets to lessen the amount of field seams, and there’s quite little versatility at the membrane.
Disadvantages- Area tiles on such roofs aren’t as powerful as Thermoplastic roofs. Flashings and roof edges have a tendency to wear out more rapidly compared to the rest of the roof. Shrinkage over long spans can be striking in certain programs.
Bottom line- Could be a great investment for a construction operator, but all the conditions of a certain installation has to be carefully weighed. And decent workmanship about the install is essential.