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CITY OF RENTON Ι PERMIT SERVICES
COLD WEATHER PAVING REQUIREMENTS
This document is intended to provide the requirements for Cold Weather Paving. For the purposes of Cold
Weather Paving, the Cold Weather Season is defined as beginning October 1st and ending March 31st.
As ambient temperatures decrease, compaction during cold weather paving is of special concern as it causes
Hot Mix Asphalt (HMA) cool-down rates to increase reducing the available time for compaction before cessation
temperature is reached. Therefore, special care should be exercised when paving in cold weather to ensure the
HMA is sufficiently compacted before cessation temperature is reached.
WEATHER LIMITATIONS
Surface Temperature Limitations are outlined in WSDOT Specification 5-04.3(16) - Weather Limitations. The
Contractor may elect to artificially increase the surface temperature to meet the required Specifications.
COLD WEATHER PAVING REQUIREMENTS
Any paving of the wearing course to be completed during the Cold Weather Season is subject to the
requirements outlined below:
1. Contractor shall submit a written request to the Development Engineer (City Project Manager) requesting to
pave
wearing course during the Cold Weather Season. The written request shall include:
a. Date(s) and Time(s) the work will be performed
b. Location
c. Project Information (Permit number, Project name)
d. The means and methods for completing the work (i.e. how the appropriate surface temperature will
be maintained).
2. The City Construction Inspector may request to be on-site while work is in-progress.
3. A material tester shall be on-site to verify both compaction as well as surface temperature.
4. The Contractor shall provide compaction reports to the Construction Inspector ensuring that the
compaction and surface temperatures are consistent with the Standard Specifications throughout paving.
ACCEPTANCE BY THE CITY
Any paving of the wearing course not completed in accordance with all Federal, State and City requirements will
not be allowed. Substandard or deficient work, as identified by the City Construction Inspector, shall be
repaired and/or replaced to meet the minimum requirements of the Standard Specifications.