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Roofing FAQ’s


Looking at getting your roof replaced can bring up a lot of questions.  Check out our FAQ section below.  If you have a question that isn’t listed in the FAQ’s, please contact us and one of our experts will be able to help!


Roofing FAQs

A basic roof inspection needs to be performed twice a year; typically in the spring time after the harsh winter, and in the fall after the intense summer. Both seasons take a toll on your roof. Inspecting them twice a year is a great way to stay on top of your roof's condition.
A homeowner can do a basic roof inspection. Things like missing shingles, overflowing gutters, moss, curling and/or bubbling shingles are problems that are easy to spot from the ground. A roofing expert should be called to do a detailed roofing inspection. They are trained and know what to look for when assessing your roof for potential damage that may not be as obvious to the untrained eye.
1. Check flashings to ensure they're sealed. 2. Clean debris off roof. 3. Remove moss or mildew. 4. Trim trees and greenery that is close to the roof line. 5. Clean and clear the gutters.
The type of roofing material you choose should depend on a variety of different variables. Aesthetics, cost and climate of your location all play an important part in determining what type of roofing material is best for your situation. Refer to our different roofing material pages under the heading "Roofing Types".
Asphalt shingle manufacturers recommend not using asphalt shingles below a 4:12 pitch. However, some say you can install them on a pitch as low as 2:12 with ice and water shield.
Any pitch less than 4:12 is considered a low pitch roof.
Yes and No. A couple of variables need to be considered before you can do a go-over (new roof on top of an old one). First, if it looks like the roof is leaking or has significant damage, then it is best to remove the roof to examine the roof decking for rot. Second, not all materials can be roofed over. Typically 3-Tab asphalt shingles and less prominent dimensional shingles can be roofed over. If your current roof is not laying flat, then chances are, you need to remove the old roof before installing the new one.
The best way to prevent moss from growing is to apply a moss killer that is specifically designed for roofs in the fall. Do NOT use a moss killer that is used for grasses as they will discolor and deteriorate your shingles. Consistent seasonal roofing maintenance keeps moss from becomming a big problem.


Do I have to have my old roof torn or can a new one be placed over top?

A couple of variables need to be accounted for before it is determined that you can have a new roof installed over the old roof.
First, if it looks like the roof has been leaking or there is significant damage to your roof then it is best to remove the roof and inspect the wood for rot.
Second, not all the shingles can be roofed over.  Typically any sort of architectural shingle will not lay flat when roofed over.

What can I do to prevent moss from growing on my roof?

The best way to prevent moss from growing is to apply a moss killer that is specifically designed for roofs in the fall.  Do NOT use a moss killer used for grasses as they will discolor your roofing shingles.

What is the best way to clean moss and algae off my roof?

There are certain mixtures for purchase that can be used to spray your roof and treat for moss and algae or you can make your own mixture.   If you purchase a pre-made mixture be sure to follow the instructions included with the bottle.

If you prefer to make your own treatment, mix a solution of 50% water and 50% bleach and add it to a sprayer.  Spray your roof and let it sit for 15 to 20 minutes.  Do not let it dry.  Then wash off with a hose or use a long armed brush to scrub off the moss and rinse with water.

For a better understanding of moss and algae as well as proper cleaning click here and for other home made mixtures for moss removal click here.

Why is moss bad for my roof?

Moss can hold moisture on your roof.  This does not allow for proper draining and rain run off. Improper runoff can then damage your roof and cause potential leaks.

My roof shingles are bubbling, what is happening?

Your shingles are buckling.  Buckling of shingles happens when the shingles do not lay flat Can be due to the under lament moving from moisture having built up underneath the shingles.  There is also a possibility of nails that were not secured completely that could cause a bubble in the shingles.

Why are the edges of some shingles curling up?

There are a few reasons why your shingles are curling.  One could be they have reached the end of their lifespan and you need a new roof.  The shingles could have been installed poorly or manufactured poorly.  Another reason may be that you have improper ventilation.  Without proper ventilation, heat from the attic can cause the curling from the underside of the shingle.  This will cause your shingle to wear down quickly.

What is a good sign my roof needs to be replaced? No leak.

If you are missing shingles, your shingles are curling, flashing is extremely worn and your granules are coming off, it is a good time to replace your roof.   You cannot always determine damage that can be occurring under the shingles as time goes on and wears down your roof.  The best idea would be to replace your roof before your boards underneath the shingles become rotten. If you wait too long your replacement cost can  increase as well as there is more potential for damage inside your home.

Still not sure check out this page by the National Roofing Contractors Association or give us a call to come and inspect your roof!

When is it the best time of year to install a roof?

Typically when you can rely on good weather is the ideal time to schedule and plan for a new roof.  Many people wait until mid fall to schedule roofing work.  This tends to be a busy time for roofing companies.  When planning, try to not wait until the last minute to schedule out a job, because you may have to wait to get your roofing scheduled.

I have a dark spot on my ceiling is that a roof leak?

Yes, it is possible you have a roof leak.  It is best to call someone for an inspection.

Why do I need more vents installed?

It is crucial to have proper ventilation from your attic.  This will ensure that there are less complications with your roof later on.  Things like buckling, fish mouth and curling could all be causes of improper ventilation.  It is also necessary to have the required ventilation in order to guarantee the manufacturer’s warranty of the shingles.

What do I as the homeowner need to do to prepare for your arrival to roof my house?

Proper clearning of an area for our dump trailers and trucks to get as close to the roof as possible.

What does Allen Roofing and Construction Inc. do to protect my home?

We preform a number of tasks before, during and after to protect your property and your home.  First we prepare the area by moving plants and outdoor furniture that may be in the way.  We use tarps to cover the surrounding area and plywood to protect the landscaping.  When necessary we set up temporary structures to protect shrubs and plants as well as covering decks and railings.  Every day we clean up and leave your home as neat as possible, within reason.  After the job is completed we run a strong magnet over your property to pick up any nails that could have been left on the ground as well as move everything back to the way it was before our arrival.

Have more roofing questions?  Visit our Contact Us page and submit a question.  We will get back to you as soon as possible!

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