The colors used on the exterior side of the building envelope all have an impact on how efficiently the desired temperature can be maintained inside the building. As a general rule, darker colors absorb heat, while lighter hues reflect it, but here are some more details of how the rule applies for roofs.
In terms of contact with solar radiation, the roof is the most exposed housing component, in constant daytime contact with the sun’s rays. Black or dark colored roofs absorb the heat of the sun and transmit it towards the building interior, therefore dark shades are great for cold climate areas, where any help that can make the work of the heating system is welcome. Lighter colors, on the other hand, reflect solar heat, which means that they never become as hot as dark roofs and they make it easier to maintain the air inside the building cool.
The color of your roof can, in itself, reduce the strain that your air conditioner or your heating system has to endure in respective peak periods, but to be able to make the most of the thermal protection provided by your roof, it is a good idea add insulation underneath the roof as well.
Stains and discolorations are among the most common roofing issues, especially in regions that are close to large bodies of saltwater or fresh water. Unfortunately, the problem is not merely a cosmetic issue, but in most cases, it is not very difficult to solve. Here are some things quality conscious Denver roofing companies want you to know about roof stains:
Dark brown or black stains – usually caused by an infestation with algae or fungus or by a bleed-through of the asphalt layer on shingle roofs. The issue can be remedied with adequate algae and fungus removal substances or through the replacement of the components affected by the extractive bleeding;
Dark grey, sticky stains, moss and lichens – these spots are most often caused by the secretion of a tree right above the roof. The shade provided by the tree might also favour the growth of moss and lichen. The best way to address the issue is to trim the tree and to clean the roof with some water mixed with a suitable detergent;
Rust stains – rust appears on metal surfaces, including not only the roof surface, but metal flashing and gutters as well. Metal roof components become affected by rust when the surface treatment gets damaged or weakened and the metal comes into direct contact with moisture. To solve the problem, the rust must be removed with a brush or with suitable, rust removal products, then the surface coating needs to be restored, too.
Flat roofs have a very slight inclination, invisible to the eye, that’s why heavy rains can form ponds on their surface. This is not a reason of concern unless water remains on the roof for more than 48 hours.
The flat roofs are designed to resist water ponding, being covered with sealing membranes and provided with water drainage systems. However, ponding water is always a risk and must be avoided to protect the roof. Flat roof commercial roofers in Denver are experts in this area, and can be called upon for inspections, repairs, and all other roofing services.
First, standing water adds weight on the roof and increases the pressure on its structure. It weighs about 5 lbs. per inch, so a large ponding area can stress the roof more than you may realize. Also, as water accumulates, it tends to cause deck deflections (sags), which will gradually increase the ponding water problem, compromising the structural integrity of the decking.
Ponding water also cause premature wear because it attracts algae formation and dirt, so the roof`s membrane is more prone to rot.
The building owner must address this problem promptly, not just because of the risks, but also because most roof warranties are voided if the water ponds for more than 48 hours. A flat roof must be carefully inspected after each rain storm.
If you own a house or a commercial building, you probably have already faced problems with the roof: damage or water infiltration. Although the roofs are designed to last for a long time, they are not infallible, and depending on the type of roofing, the wear will appear sooner or later. Premature wear can be largely caused by incorrect installation and poor maintenance. The most frequent damage to the roof comes in the form of infiltrations, rot, cracked, loose or missing materials and galvanic corrosion (in the case of metal roofs). These problems not only can cause damage to the entire building and te things inside it, but also require very large amounts of money for repairs.
What do we choose: repairing, restoring or replacing the damaged roof?
If you have a roof with various vulnerabilities and damage, you have three options: repairs, restoration or replacement. Of course, the decision depends on the state of the roof and the budget you have.
Repairs often refer to patching the roof, solving smaller problems. On the other side, roof restoration is more complex and represents an intervention aimed at bringing the roof closer to its original state, without changing its configuration or details. If the budget does not allow you to replace the roof altogether, restoration can be a good alternative. The right products and a team of Fort Collins commercial roofing professionals can preserve the roof`s integrity and extend the life even of even the most damaged roofs.
Flashing is an important accessory for any fully functional roof. Flashing is mounted under the cover at the intersection of two valleys and allow the water to be directed to the drainage system, preventing infiltrations.
According to Fort Collins roofing company pros, superficial or incorrect installation of the flashing is one of the most common roofing mistakes, with severe consequences, since flashing is the most vulnerable roof section, considering that it deals with collecting and directing substantial amounts of water.
Usually the sides of the flashing have 250-300 mm. However, if the valleys they join together have large surfaces and inclination angles, it is recommended to use a special flashing with larger sides than the regular products. The size of the flashing`s sides will be determined by the roofing specialists who, thanks to their experience, know exactly which is the required size of the flashing, in each case.
Starting from the idea that the function of the roof flashing consists in collecting the rainwater flow from the roof and direct it to the drainage system, it is strictly forbidden to pierce it.
When installing the shingles on each side of the flashing, make sure you do not make joints or tap nails in the flashing or near the center axis, otherwise you will cause infiltration.
Often, people save on the roof ventilation, ignoring its importance and efficiency. A roof that is not properly ventilated has the following risks:
All these risks can cause severe damage to the wooden parts and to the entire roof structure. In order to understand the importance of adequate ventilation, we analyzed what is happening with a ventilated and a non-ventilated roof, during the hot and cold seasons:
In the hot season
Non-ventilated roof: The roof coat transmits the heat to the insulating material, which has a thermally slowing function. Subsequently, the heat is transferred to the interior of the building. As a result, more energy will be used for air conditioning.
Ventilated roof: The sun heats the air in the ventilation space, which becomes easier and goes out through the ridge, instead of accumulating under the roof.
In the cold season:
Non-ventilated roof: Due to cold weather and temperature fluctuations, condensation happens and causes mold and high humidity the roof`s structure.
Ventilated roof: In winter, air circulation will dry the insulation and avoid condensation. In the case of snow and frost, ventilation allows uniform snow melting on the roof and prevents the formation of ice barriers.
It is possible that over time, unsightly stains may appear on your roof. These are caused by moisture, which may alter the color of some roofing materials or favor the appearance of mold and mildew that also stain the roof.
Mold and mildew are often found on the northern part of the roof which is not so exposed to the sun; if leaves and other debris remain on the roof for a longer period, they retain moisture and allow mold and mildew formation. These stains can be cleaned easily with special solutions, often including chemicals, to destroy potential bacteria and microbes that can spread from the roof to the walls inside the house, if they are not removed promptly. Before using chemical cleaning solutions, an informed Denver roofer recommends testing them on a small area, to see how the material reacts under the action of chemical ingredients.
Sometimes simply washing the roof can be enough to remove the stains. However, it is also possible that the stains indicate a worn out and degraded roof profile; in this case, repairs or even a roof replacement might be in order.
If you find that your roof has what appear to be water stains, contact a specialist to determine what is to be done about them.