Understand what a surface patch changes
A patch normally targets a defined failed area rather than renewing the full property. Compare the proposed saw-cut or removal limits, excavation depth, base repair allowance, compaction, asphalt lift and edge treatment. Ask how the patch elevation will meet drains and adjoining pavement and what evidence supports the boundary. Repeated patches may also indicate a larger unresolved condition.
Define milling and overlay assumptions
An overlay adds new asphalt over a prepared surface, sometimes after milling to manage elevations or remove distressed material. Clarify the milling depth, cleaning, tack coat, levelling, crack treatment and tie-in details. An overlay can improve the surface, but it does not by itself prove that movement, weak base, poor drainage or elevation constraints have been resolved.
Identify signs that need deeper review
Widespread interconnected cracking, deformation under loads, repeated settlement, pumping, failed trench repairs and persistent wet areas can justify deeper investigation. These observations are not a diagnosis. Ask what test pits, probes, cores, drainage review or professional input would support the proposed removal depth and whether investigation is included, optional or excluded from the estimate.
Describe full-depth reconstruction clearly
A reconstruction proposal should identify removal limits, disposal, subgrade review, base materials, lift thicknesses, compaction approach, asphalt layers and transitions. It should also explain how changed conditions will be handled if the exposed ground differs from assumptions. Compare the measurable scope and verification process rather than assuming every full-depth proposal includes the same work.
Protect elevations and drainage paths
Any added or removed thickness can affect curbs, catch basins, door thresholds, ramps and adjacent concrete. Ask bidders to state how final elevations and drainage paths will be established and checked. When changes affect public infrastructure or require engineered drainage, confirm the City or Township review path for the exact address before authorizing construction.
Compare lifecycle statements carefully
Service-life estimates depend on design, materials, loads, drainage, construction quality, maintenance and future conditions. Treat an expected-life statement as an assumption that should name those dependencies, not as a guarantee. Request written warranty terms separately, including duration, covered defects, exclusions, notice requirements and who is responsible for maintenance or third-party damage.
Use one decision record for every proposal
For each option, record the included area, preparation, depth, materials, drainage work, traffic plan, schedule assumptions, testing, markings, warranty and exclusions. Keep allowances separate from fixed quantities and require written approval for changed conditions. A one-page comparison table makes missing scope visible before a price is selected and becomes the basis for later closeout review. Compare each option using the commercial paving RFP checklist so quantities, assumptions and exclusions can be reviewed together.
The Township development-servicing page identifies pavement, drainage and engineering documents within its infrastructure process. Langley City's design-criteria page points to the current City manual. These sources define authority context; they do not select a repair method for a private property.
Township of Langley — Development Servicing · Langley City — Engineering Design Criteria
Sources reviewed September 22, 2026. Confirm current requirements for the exact address and proposed work.