We are looking to replace our roof. We have received about 5 bids for both foam and membrane. I am looking for input to which is a better choice. The property is located in in Hollywood.
We have worked in the Hollywood area in the past and Real Property owners tend to go with the cheapest bid instead of the best quality products for the use. Photovoltaic systems are warrantied for 25 years and should have a roof that will outlast or be equal to that warranty. The only products on the market place that can effectively meet that warranty period are heavy duty PVC membrane roofs. These roofs can allow penetrations if necessary that will be warranted with the roof for the mounting system or racking for the solar modules. A few of these companies have now developed base mounts for solar that are designed to withstand the warranty period needed. We have placed systems from California to Puerto Rico and always recommend this type of roof if possible. We also provide non-penetrating systems if the client prefers not to risk any penetrations to their new roof. The nice part of placing a membrane system along with the racking of the system is that the roof becomes part of the photovoltaic installation as part of the mounting system. This allows the client to receive the 30 % Federal Tax Credit and take the MACRS depreciation with the entire system (including the roof ) that has been placed as an integral unit. We have placed systems on foam roofs and although cheaper and providing a little more insulation the penetrations for racking become a little riskier do to wear and the foam is more easily damaged during the installation period. The trade off for PVC membrane is that when the modules are placed on the roof they shade the roof and provide additional cost savings to the air conditioning load. Please contact me if you have need of appropriate integration of your system we have partnerships with several membrane roofing manufacturers.
I have used Sarnafil PVC membrane (.040) on several roofs over the past 12 years. We mechanically fasten it over 2" if rigid urethane foam sheets. The joints are heat welded at 1800 degrees. We use a white material (it comes in different colors) so that it reduces solar heat gain which is important even in Maine in the summer months (been in the 90's here for over a month). It tolerates high winds well and is very tough. Though it has a 10 year warranty, I have talked to people that have had this type of roof in place for over 20 years, some even nearly 30 years. I wouldn't use anything else.
In reply to dwrose:
Dear Dworse, I am interested in this form of waterproofing. I have a long experience in waterproofing and am currently working in the Middle East. If you may email me with some brand names I can use here, I would appreciate it. I am not sure if I may write my email here or not, it looks like it is not permitted, so an answer through the website is acceptable
In reply to charlieoztan:
If you are planning on using a top quality PVC roof membrane along with a solar installation, I would recommend a manufacturer called IB Roof Systems (Dallas,Texas). They have developed an attachment system for racking system mounting plates that is guaranteed for the same life as the modules. I have seen their product that has lasted for forty years on other roofs without leaks. You may call them and let them know that I sent you. They have an excellent product with an excellent warranty and although a bit more expensive it will outlast or equal any roof in the market place. I am a solar integrator not a roofer but our experience working with fortune 500 companies, and government projects has been excellent using this product.
I'm a Building Envelope Consultant. I have seen alot of foam roofs over the last 25 years, most of them being replaced. the only foam roofs I have seen worth even considering have a Dow or GE Silicone's coating. Foam roofs need constant maintenance and those companies seem to hook up with the right contractors to provide that maintenance.
Stick with the membrane roof. I would highly recommend a "heat welded" membrane, minimum thickness of 60 mil.
Thanks to everyone for your comments.
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Interesting information, I find your contractor firm’s information really helpful for the future!!thanks!!.
Why do you need a new roof?
What type of roof are you replacing?
What is the construction of the substrate from the roof up?
Many property owners find they are in need of a combination waterproof roofing system and rugged decking membrane. For example, on apartment building balconies. Or sometimes over a homeowner’s garage a rooftop deck is desired for lounging. Rooftek staff specializes in a system of PVC membrane that is used both as a roof and as a deck membrane which is very tough and capable of handling patio furniture, chairs and human and pet traffic. It is even excellent for those “bare-foot” applications such as tops of docks, pontoon boats, swim rafts, etc. where one wants a slip-resistant, clean surface that is cool to the touch even in the sun, but splinter free and maintenance free, while protecting the wood substrate and structure underneath. Imagine being able to sunbath or dive off your slip-resistant PVC coated dock or swim raft, not fearing splinters. PVC decking membrane, a very under-used product, is one of the best products to save homeowners and cottage owners time and money on wood deck replacements, staining, scraping, sanding, etc. We offer the only 20-year warranty PVC decking membrane that is washable, and gives years of peace of mind to property owners.
In summer is the best time to replace the roof .
1.Check the exterior of the roof : When you take a look at the exterior of the roof, pay attention to such things as damaged flashing, missing shingles, curling, blistering, buckling, rotting and algae growth.
2. what is the roof made up of : Cedar: A cedar roof in need of repair or replacement will split and fall apart in dry climates. In moist climates, it will get mossy. The lifespan of a cedar roof is about 20 years.
Tile: "Look for broken or cracked tiles," Bennett says, "but don't walk on the roof to do so or the tiles will break. Tile roofs can last up to 100 years, but individual tiles can break. They can be replaced, but only by a specialist."
Concrete: should never need replacing and you also check which type of roofing you are prefer most all of these things are depend upon it .
But in the end i suggest you for metal roofing which is durable .
In reply to jacobtaylor:
There are some great points to consider here. Thanks for the info!
While a complete roof replacement project is actually
somewhat simple in its requirements, most homeowners will opt to hand over the
responsibility of it to a seasoned professional. Why? There is a great deal
more to the process than removing old shingles and laying down new ones. There
could be a need to replace plywood, flashing, and cement. There might also be a
call for the re-pointing of a chimney, repair of gutters, or resealing of
skylights. All of these things are usually noted right away by the roofing
professional. So choose licensed company for good result. Liquid Roof Repair
Hello there, Membrane and foam are both good. The difference is the manufacture of material and the certified Contractor. The longer the warranty the better the product. From my experience, even if you don't know too much or don't understand, the best and simplest solution is to find a contractor that has the best insurance policy that pertains to the job that is being done and the company must be specialized in that field for a minimum 10 years in business. You may pay more but the least headache you will have down the line. Thank you,
Quality Control Consultant
Your choice of roofing materials often depends on your locality, as much as on your own personal taste.
Asphalt Composition Shingles: Cheap and easily obtainable, but less attractive than other options due to "flat" appearance.
Wood Shake: a pricey, but attractive shingle.
Metal Roofing: Metal roofing is still rare, and few roofers know how to install it; special companies are required for this job.
Slate Roofing: highly attractive, and a high-end roofing option; extremely slippery to walk on.
Rubber Slate or "Faux" Slate - Recycled post-industrial synthetics gaining in popularity.
Roof Replacement Cost and Terminology
The cost to replace a roof, as you might imagine, varies. It varies according to your roofing materials (all the way from cheap 3-tab asphalt shingles up to architectural shingles or even slate), the roofing contractor, the pitch (or steepness) of your roof, the area to be covered, and a host of other factors.
Generally, you're looking at costs of $5,000 or more. It is hard to imagine a whole-house roof replacement to cost less. Roofing contractors have a great deal of flexibility to negotiate on the cost, so you please feel that you have license to do so.
There are a few words you will need to know.
A "square" is a unit of measure equalling 100 square feet.
A "vent" runs along the ridge of the roof to expel trapped vapor and heat, so that the roofing does not buckle and deteriorate over time.
"Composition" is what is commonly referred to as asphalt shingles. For more information
Liquid Rubber Roof Repair