Saturday, July 18, 2015
The back side of the flat roof was a lake so we filled it in with 1” perlite insulation and tapered it with 4’ x 12” x 1”- 0” tapered edge. This flat roof now dries completely well within Miami-Dade 48-hour rule for excessive ponding. The system consists of two hot-mopped Gafglas#75 base sheets with a Ruberoid MopGranule cap. It is coated with Karnak No. 97 aluminum roof coating to achieve a Class A fire rating. I like this system because it gives the owner a head start on a maintenance regimen, crucial for residential flat roofs. But that is for another article.
Sunday, December 28, 2014
Ask ten Miami roofers, “Which is better, concrete tile or clay tile?” – and it may end up a tie. I prefer concrete, and I’ll tell you why, but it really is a matter of taste. We recently completed two tile roofs, one in Miami Springs and another in Coral Gables, which illustrate the differences and similarities very well.
There are three things to consider when mulling one’s options for tile roofs in Miami – color, profile and concrete or clay? Follow my posts for a while and you’ll notice a preference for white. Shingle roofs, tile, metal roofs - it doesn’t matter - white is better for energy efficiency and durability. I also prefer Spanish S, or barrel, tiles over flat tiles as they allow less water to penetrate through to the waterproofing underlayment. Without poring over engineering and testing reports I can tell you that barrel tiles are also stronger, having walked on thousands. Medium-profile, or Double-S tiles, are even stronger but I am not a big fan of how they look – that’s just me.
It is the strength of concrete that leads me to prefer it over clay. I am comparing the common, mainstream products used in residential roofing systems in South Florida. There are some clay tiles, Ludovici for one, which are comparable to concrete in strength but as I said, I am talking about mainstream products - Ludovici is extremely expensive. You may have read that pound-for-pound clay tile is just as strong as concrete, if not stronger. That may be true, the problem is clay tiles are thinner and that is the main reason for their overall tendency to break. To put it to rest, I have been called dozens of times by distraught homeowners who have had their clay tile roofs badly damaged by exterminators after having their homes tented. I have never gotten such a call from someone with a concrete tile roof.
So, it’s official, Roofer Mike likes white concrete barrel tile. I do, but I am looking at it mostly from a roofer’s perspective in consideration of roof integrity. To me these benefits trump aesthetics and I am not shy about bringing them to a client’s attention if they are at all indecisive as to a selection. I have learned, however, that while it is OK to be so bold as to suggest, you must respect a client’s preferences. In keeping with my general philosophy I put the information out there and let the customer decide. I have had many people tell me they haaate white and they hate barrel tiles and they love clay. Given that tile roofs are very attractive systems I must respect a person’s decision when they put aesthetics first, as these customers did when they went in different directions with their choices. One went with a terra cotta concrete barrel tile while the other went with a Spanish S clay tile roof, also terra cotta. I am not captioning the photos here. Can you tell which one is clay? Suffice to say the concrete tile manufacturer did a good job mimicking clay tile. Related Content
Sunday, March 23, 2014
Before we performed our roof cleaning service on this home in Miami Springs it was so black from algae growth that the actual color of the concrete tile was difficult to determine. The inherent energy efficiency of the tile roof was negated as it now absorbed the sun's rays, heating and aging the underlayment and raising temperatures inside.
We were called to provide an estimate for a roof
cleaning but upon inspection discovered an attached
flat roof, a white Ruberoid system, that was equally black with algae stains.
After cleaning the flat roof and applying two coats of elastomeric coating it was now brilliant white. This will greatly reduce temperatures inside, cooling costs and the load on the air conditioning system while extending the life of the flat roof.
Ideally this roof cleaning and roof painting should have been done sooner but it is good to know homeowners in places like Miami Springs are more aware of energy
efficiency and the benefits of roof maintenance.
By Michael Slattery
Monday, March 17, 2014
This “before” shot of a roof coating job near Miami in Pinecrest, Fl. was taken after an extensive roof cleaning, so you can imagine how dirty it was before the algae stains were removed. Flat roofs benefit from maintenance more than any other residential system and should be inspected every year. We offer FREE yearly inspections to all residents in our service area.
The application of elastomeric roof coatings is the most effective maintenance practice for low-slope roofs. These coatings slow the aging
process of flat roofs and increase a home’s
energy efficiency by blocking solar radiation.
Roofer Mike Inc has extensive experience in the application of acrylic, polyurethane, and silicone roof coatings in water based and solvent based formulas. Solvent-based coatings tend to be much more expensive and must be used where ponding conditions are present. Water based coatings are used on flat roofs with good drainage, metal roofs and even tile roofs but should not be applied to shingle roofs.
The South Florida roofing market features many local and national manufacturers of elastomeric roof coatings. From economy coatings to pro-grade, there is a coating for almost any budget. Roofer Mike Inc is
familiar with all of them and can recommend
the best product for a customer’s needs.
Thursday, January 23, 2014
This roof repair involved two "crickets" in western Miami-Dade County in the middle of a concrete tile roof. Crickets are water diverters commonly found behind chimneys or, as in this case, structures designed to transfer water from one roof area to another.
These areas were created as part of the design of the front of the house to create an aesthetic and detail. The upper cricket is a flat area where two opposing roof planes meet and is an acceptable design. They are flashed using conventional methods. Often architects will terminate a roof plane at a vertical wall, a "dead valley", as in the lower area where the cricket itself was never built. This is simply a bad design but something roofers must deal with. In this case we tore out all roof materials to the wood deck and installed a cricket with a slight pitch to the next sloped roof area. We installed 5”x 7” metal base flashings and stucco-stop, GAF #75 base sheet and torched a layer of GAF Ruberoid Torch Granule.
Ruberoid is an ideal material for addressing cricket areas.
We installed new metal flashings from the lower cricket, up-slope to the upper cricket and torched Ruberoid over that as well. Then we put the tile back and as an extra reinforcement applied two coats of GAF Topcoat Surface Seal to the lower cricket especially, in consideration of the volume of water it tolerates.
by Michael Slattery
by Michael Slattery
Thursday, September 26, 2013
|Tearing off, drying in and torching a flat roof|
|The infamous Miami-Dade tin-cap pattern|
When it quits raining we'll install a retrofit drain at the deepest spot and apply a solvent-based Sealoflex maintenance application to the whole thing. It'll be fine . . .
by Michael Slattery
Roofer Mike torching on the house !!!
Friday, September 13, 2013
In Miami roofers face a daunting task whenever they must replace a flat roof in the middle of rainy season. Many of these are backyard residential low-slope roofs tied in to a sloped roof - usually a concrete or clay tile roof - creating problems when protecting the home. To avoid a catastrophic flooding of the house during a low-slope replacement we follow these basic steps. Two rules of thumb I’ve picked up over the years when dealing with flat roofs in Miami can be summed up like this: plan ahead and don’t be cheap!!
Pick the right day to tear off the roof. Give yourself the best possible chance to have a day free of the drama that comes with having a flat roof half torn off in the face of a fast-approaching thunderstorm. I simply will not open a roof when rain chances are 40% or more. This is all an exercise in patience not only for you but the customer who should be briefed on the importance of choosing the right day.
Remove roof tiles in advance of the tear-off at the tie-in. Usually we tear off two rows of tile to accommodate the tie-in. When the flat roof is complete we put one row back, ensuring we’ll have enough. This can be time-consuming so it is helpful to have it done in advance.
Make the cut at the tie-in right away. On the morning of the tear-off the cut should be made 18” – 24” above the break at the slope transition. Explore the tie-in area and find where the existing tin-caps are. They are typically installed in rows so if the cut is made immediately above a row there will be plenty of free space to slide in the base sheet for a head-lap of at least 4” or, when necessary, a tarp. Once a flat roof has been significantly torn off there is no choice but to tarp it when a thunderstorm pops up – be ready. Having a phone that will give you real-time animated radar shots is mandatory – you must to be able to see the storm coming.
Use a good tarp – blue won’t do!! When buying a tarp there are basically two rules. RULE 1: DON’T BE CHEAP!! Tarps are color-coded, blue tarps are light duty (5-6 mil) and a too thin to trust here. They puncture easily and that is a disaster on a flat roof full of water. I like the silver tarps. At 12 mils they are heavy duty and UV resistant so you can get more use out of them. RULE 2: DON’T BE CHEAP!! Make sure you buy a tarp big enough to extend over the eaves. The roof shown here was L-shaped so we used two tarps with a 3 foot lap. Placing 2 x 4s under the lap and weighing the tarp down on each side has worked well for me.
I know, the big orange box and roof suppliers have mostly blue tarps and heavy duty tarps are hard to find with a limited selection. www.tarpaflex.com has all the tarps you can possibly imagine at great prices with fast and free shipping. With a little planning you can always have the right tarp for the job.
Monday, August 19, 2013
This clay tile roof repair we just finished in Miami Springs is typical of the roofing contractor services we provide at Roofer Mike Inc. Clay tile roofs are common in the Miami, Fl. area but present challenges when making repairs. They are dense and therefore brittle so care must be taken when removing and walking on them. Yes, there is a correct way to walk on a tile roof.
This roof was only 12 years old and the leaks were originating from the valley, indicating workmanship defect. Three types of metal flashing converge at the bottom of this valley – typical – and they must be done correctly or will eventually leak. Flashings should be coated with asphalt primer to ensure adhesion of the underlayment .The flashings must also be set in flashing cement. If regular cement is used it will shrink, dry out, shrink and cause the flashings to fail over time, usually 10-15 years. We use top quality modified cement for all our roof repairs and replacements. Flashings must be nailed down and nails improperly driven or placed incorrectly will cause leaks.
When there are multiple leaks in one valley with so many things possibly gone wrong underneath we always advocate a complete rebuild – rotten wood replaced, new flashings, new valley metal and Tarco PS 200 tile underlayment which is superior to the centuries old hot-mop method. Roof tiles are attached with polyurethane foam which is foolproof compared to mortar.
As with all our roof repairs this job comes with a 3-year warranty, triple the industry standard. How can we do that, you might ask? We don’t mind spending a little extra on quality materials and our repairs are designed to outlast the existing roof.
By Michael Slattery
<a href="http://www.hypersmash.com">Hyper Smash</a>
<a href="http://www.hypersmash.com">Hyper Smash</a>
Saturday, August 10, 2013
|Flat roof rotten wood replacement|
|Miami-Dade tin-cap pattern for flat roofs|
There was plenty of rotten plywood, 3 sheets on a 460’ sq. deck, so much so that we flirted with Miami-Dade’s 25% rule which calls for complete re-sheathing when over 25% needs to be replaced – it was close. Then the entire deck was re-nailed to code. Two plies of GAF Gafglas base sheet were tin-capped to code, a 10” strip applied at the perimeter under 3”x3” 26ga. galvanized drip-edge nailed every 4”oc, which was then primed.
|Installing concrete roof tiles at the tie-in|
Friday, August 2, 2013
We recently finished this concrete tile roof in Miami and it looks great! The old roof was torn off to the deck, there was some rotten wood replaced and the deck was re-nailed to Code. We dried in with 30 lb. felt, tin-capped it to code and installed 16” 26ga galvanized valley metal and drip-edge flashings. As usual, we upgraded - free - the edge flashing to factory white.
GAF UnderRoof 2 tile roof underlayment was then installed according to GAF specs which includes back-nailing and rolling with a 120 lb. roller. We spend a little more on U2 compared to what is popularly used by other roofing companies and feel it is worth the expense – simply tougher.
I suggested Entegra Boosted Bella concrete tile in white and the client agreed. The old roof was a 9” flat tile and I thought a high profile barrel tile would give the home a classic look. The choice of a white tile should shock no one who has been paying attention as I will always recommend its superior reflectivity which enhances energy efficiency. A white tile will also extend the life of the underlayment and, as a neutral color, goes with almost any homes color scheme.
Tile roofs like this are part of the signature look of Miami.
|Concrete Tile Roof in Miami, FL - Entegra Boosted Bella|