Sunday, May 26, 2013

Permit Fees for Impact Windows and Doors

Untitled Page impact windows permit fees charged by municipalities
Homeowners planning to replace existing windows for impact-resistant windows always ask us how much permit fees will cost. The answer is not simple as each municipality has different formulas to calculate the permit fees.  To give our potential clients an idea of how much fees might be, we have looked at our accounting records.  The table provided below contains a short list of previous projects by municipality.  On this list, homeowners and our readers can learn how much our previous clients have paid for permit fees.  We have included the total project cost to provide a tangible point of comparison.  It is our understanding that project cost is one of the important factors municipalities use to calculate the permit fees due. In addition, they might use the square footage of glass replaced and the total number of different products installed (because they review each product approval).
Municipality Date Project Cost Permit Fee
City of Coral Gables 5/7/12 $17,800 $803.00
City of Coral Gables 7/13/12 $43,840 $1,244.27
City of Coral Gables 12/13/12 $22,329 $1,192.07
City of Coral Gables 2/12/13 $8,000 $294.64
City of Miami 2/29/12 $19,736 $172.84
City of Miami 1/27/13 $24,303 $194.44
City of Miami Beach 2/27/12 $23,948 $1,454.84
City of Miami Beach 7/27/12 $24,448 $565.64
City of Miami Beach 2/4/13 $89,600 $811.09
City of Miami Beach 3/20/13 $14,864 $477.65
City of Miami Springs 10/16/12 $15,690 $151.44
Miami-Dade County 2/15/12 $74,234 $151.04
Miami-Dade County 5/9/13 $14,284 $147.44
Town of Miami Lakes 7/2/12 $4,858 $111.94
Town of Surfside 4/5/12 $13,128 $481.98
Village of Biscayne Park 7/19/12 $4,390 $281.44
Village of Key Biscayne 12/20/12 $34,359 $3,157.45
Village of Key Biscayne 11/29/12 $7,743 $707.72
Village of Palmetto Bay 4/4/12 $17,955 $280.30
Village of Palmetto Bay 3/12/13 $10,285 $277.58
Village of Pinecrest 8/12/12 $21,975 $245.64
Village of Pinecrest 4/09/12 $35,000 $273.49
Village of Pinecrest 3/29/13 $21,975 $245.64
Source: Astor Windows and Doors Accounting
Important note:
Please understand that this list is provided for informational purposes only. Astor Windows cannot guarantee nor estimate in advance how much permit fees will be assessed in our future projects. We hope that this information proves useful during your research when in the market for installing impact windows and doors for your property.

Thursday, February 28, 2013

2010 Florida Building Code and the use of two methods to meet the energy-consumption guidelines

Photo of single-family home with impact windows and doors

After the 2010 Florida Building Code went into effect last March 15th, 2012, owners of new construction projects were required to comply with new energy-consumption guidelines, including maximum U-factor and Solar Heat Gain Coefficient (SHGC) values.

To comply with energy requirements, designers have two methods they can choose from:  the prescriptive or the performance path. 

Prescriptive Path
With the prescriptive or pre-determined path, designers must ensure that the proposed windows and doors have a maximum U-value of 0.75 and a maximum SHGC of 0.30.  Windows and doors must bear the label with the energy ratings independently confirmed by National Fenestration Rating Council (NFRC).  Section 402.3.2 of the code specifies that when the U‐factor varies between the fenestration products, the use of area‐weighted averaging is allowed to satisfy the U‐factor requirements.  Fenestration products missing SHGC labels are assigned default values from Table 303.1.3(3).

Performance Path
As an alternative to using the prescriptive path described above, designers can opt for employing the performance path to meet the energy preservation code.   With the performance path, designers need to use an energy compliance software tool approved by the Florida Building Commission.  This analysis only includes heating, cooling and service water heating.  Using this software allows architects or mechanical engineers to perform a trade-off between U-values and SHGC ratings.  When using trade‐offs from Section 405, the area‐weighted average maximum
allowed for fenestration SHGC is 0.50. Why is this trade-off important? To achieve low U-values,  insulated-laminated glazing is almost always needed, an option that is more expensive than just laminated glass. 

The information presented above is not intended to replace the code.  Equally important,  I cannot guarantee this information is completely accurate.  Instead, it is a quick reference for our potential clients who are designing new construction projects.  We want to ensure that they know they have two ways of meeting the energy requirements.  Hence, they should consult with the competent professional to ensure they can build cost efficiently.

For our potential clients, we provide the following information that could be useful when analyzing our proposal of windows and doors.

SHGC
The Solar Heat Gain Coefficient (SHGC) measures how well a window blocks heat from sunlight. The SHGC is the fraction of the heat from the sun that enters through a window. SHGC is expressed as a number between 0 and 1. The lower a window’s SHGC, the less solar heat it transmits.

Facts about R‐values and U‐values
  • R values rate one single material versus U-values measure entire components.
  • R-values rate how much heat loss the material resists from passing through it.
  • U‐values rate how much heat the component allows to pass through it.
  • R-values measure how much heat loss passes through fiberglass insulation.  On the other hand,  U-values rate how much heat can pass through a window component (glass, air, aluminum frame).
  • The relationship between r-values and u-factors is R = 1/U.