Why recoat
Most flat roofs in Los Alamos are either sprayed foam with a protective coating, or older built-up and modified roofs that have been coated over the years. In both cases the coating is the layer that stops sunlight and sheds water. When it's chalky, cracked or worn thin, snowmelt and summer storms start getting into the roof below.
Signs your roof is due
- The surface has gone from white to gray, with chalk that rubs off
- Fine cracking, especially near edges and around vents
- Bare spots showing foam, felt or granules
- Stains on ceilings after snowmelt
- Pine needles packed against parapets and scuppers
What we do
- Inspect the whole roof for soft, wet or damaged areas
- Clean off needles, dirt and loose coating
- Dry — the roof has to be fully dry before coating
- Repair damaged foam or roofing and open seams
- Seal details — scuppers, edges, vents, skylights and flues
- Coat at the full specified thickness, in two passes
Timing in Los Alamos
The coating season here is shorter than in Albuquerque. Cold nights in spring and fall limit when water-based coatings can cure. Late May through September is the main window. See the short coating season at altitude.
Cost
A recoat over a sound roof is often around $2.50–$4.50 per square foot in Los Alamos, depending on repairs, size, access and product. See roof coating cost.
Call (505) 257-2289 early in the season to get on the schedule.
Common questions
How long does a recoat last up here?
Often five to ten years, depending on the product, thickness and how much snow and sun the roof gets.
Can you recoat in October?
Sometimes, if days are warm and nights stay above the product's minimum. Many recoats need to wait for late spring.
Do you recoat old tar and gravel roofs?
Some, after loose gravel is removed and the roof is checked. See built-up roof coating.