Q:  How do I determine if a roof should be replaced?
    Sooner or later, every roof needs to be replaced, usually
    due to the long-term effects of weathering. If a residential
    roof is more than 20 years old, it is a prime candidate for
    re-roofing. To determine if you need to replace a roof:
  • On the ground, walk around your home with binoculars
    and inspect your roof for cracked, curled or missing
    shingles, as well as any excessive loss of the protective
    mineral granules. DO NOT CLIMB ON THE ROOF; walking
    on the roof is dangerous and can damage your roof.
  • In your attic, take a flashlight and look at the underside of the roof deck and rafters
    for any stains or wet spots indicating water leaks.
  • Asphalt shingles can often be applied directly over existing roofs without the
    necessity of tearing off the old roof. However, new shingles can not be properly
    applied over hard or brittle materials, uneven surfaces for nailing or roof decks
    with warped, rotted or unsound support that should first be replaced or repaired.
    NOTE:  Some local ordinances forbid re-roofing over two or more layers of
    shingles. If a home already has been shingled several times, it is important to
    first determine if the roof deck can support another layer of shingles before
    undertaking any re-roofing project.
Q:  What is causing the algae growth on my shingles?
    Algae growth is typically seen on light colored shingles.   It exists as a brown to
    black discoloration of the shingle and is caused by an algae known as
    Gloeocapsa.  
    Although algae may exist on a shingle, it does not unduly affect the performance
    of the shingle.  Essentially, this is an aesthetic problem.  Due to the increase in
    algae discolored roofs, shingles are now available with small quantities of zinc or
    copper granules embedded in the mineral surfaced granule coating.  These
    particles inhibit the algae growth through some of the life of the asphalt roof.
Q:  Can you give me a cost estimate over the phone?
    Not usually.  When we quote a price to our customers, we want it to be accurate.  
    No one wants a surprise cost once a project is started.  Most projects require at
    least one meeting with a client in order for us to gain an understanding of what is
    needed.  
A:  We answer questions and handle all Home Improvements, we'll put on a new Roof,
replace shingles and siding, build additions or decks and remodel your home.
This roof needs replacing.
Missing shingles and bowed
underlayment are definite
signs of trouble.  Replace!
Significant algae growth
Unsightly and hard to remove
from shingles, this problem
occurs for many homeowners.  
Do you have a question about
your roof?
Frequently Asked Questions
Coastal Construction  Delaware Roofing and Construction Company

302.346.3475