Moisture Problem Under the Roof? Look to Your Plywood For Answers

I just finished a job for a homeowner, who after 30 years, was in need of a new roof. After removing the old roof, I brought his attention to something that was no surprise to me but came as a shock to him. All the plywood was completely rotted and I don’t mean just a sheet or two. The roof was hiding an entire houseful of black, rotten wood.

The homeowner couldn’t believe it. He asked me how the plywood could be so damaged if he had never had a roof leak. The answer is quite simple and a lot more common than you think. The reason this house had so much damage is the same reason that three-quarters of the roofs I replace need new plywood. The attics don’t have enough insulation and aren’t well ventilated which can easily cause deterioration from the inside out instead of the other way around.

With a roof, airflow is absolutely crucial. Attic ventilation allows your home to “breathe” by taking in the air and letting it out. Too many homes that I work in aren’t properly ventilated, in fact, most have their house vents going into the attic instead of outside! Bathroom vents are often directed into the attic and some people even point their dryer vents into the void. All of that additional moisture has nowhere to go, so it gets trapped and absorbed by the wood. After years of decay, the plywood is no longer solid like it should be.

In the colder months, I even see frost on the plywood in the attic because it’s not properly ventilated and it’s certainly not insulated. Insulation and ventilation work hand in hand - the ventilation controls the air flow and the insulation controls the temperature. You’re probably familiar with insulation - it’s is a cotton-looking fiberglass material that often comes in pink or yellow rolls. It can also be loose-filled into tough to reach areas with a blowing machine. Remodeling professionals use insulation between walls, in attics and in basements to retain heat in the house in the winter and keep it cooler in the summer. However, without proper ventilation, the insulation is just as susceptible to moisture and deterioration as the plywood.

My customer didn’t venture into his attic, so he never noticed the problem. What he thought was a simple roof replacement ended up being a bigger job simply because, after years of decay, the plywood he had was no longer strong enough to properly support the new roof. Ignoring the problem would have voided the roof’s 30-year warranty.

The lesson for this week? If you’re going to reroof your home, make sure that the plywood is healthy and that your contractor has given you a thorough plan to ensure that your home is properly insulated and ventilated. It might cost a bit more today, but it will regulate the heat and cooling in your home for years to come, saving you on energy costs and giving you more comfort as well as peace of mind for the health of your house.

Bob O'Donnell is the owner of O'Donnell Bros, Inc., a Bristol-based home improvement company established in 1975. Email your questions for Bob to info@odonnellbros.com with the subject line “Ask the Pro”. All questions may be considered for publication. To contact Bob for your remodeling needs, call O'Donnell Bros, Inc. at (860) 589-5155 or visit www.odonnellbros.com. Advice is for guidance only.

Keeping Cool as the Temperature Rises

Mother Nature has decided to turn that heat dial up this weekend, leaving many people with nothing to do but crank up the air conditioning. Sure, a little A/C is a great way to provide fast relief, but keeping it blowing all summer long can do a number on your energy bill and your home. So this week I thought I’d put together a few simple tips to help you keep cool, but first, here is a story that might make you rethink your current set up.

A few years ago, I was called to a house in Bristol for a leak repair. When I got to the home, I found that the entire ceiling had fallen onto the dining room table. We hadn’t had rain for weeks, so I was confused how the leak occurred. It turns out that the home had no insulation or ventilation, and to combat the stifling heat seeping into the house from the attic, the homeowner had two window air conditioning units set on full blast all day. The cold air from the units and the hot air from the attic created so much moisture and mold that it completely deteriorated the plaster, causing the ceiling to fall in.

Having little or no insulation and ventilation in the attic will heat up your home like you wouldn’t believe. Most people think insulation and ventilation are only important in the winter, but they work as regulators, controlling air in both the warmer and colder months. Did you know that an attic can easily get up to 150 degrees on a hot summer day? Stand on a chair and put your hand as close to the ceiling as possible. Feel that heat? It’s a telltale sign that your house doesn’t have proper air flow, which, in addition to making you uncomfortable this summer, can also become a breeding ground for mold.

So what should you do? Start by investing in a hygrometer which measures water vapor in the air. A comfortable humidity reading is 30-60%, but 45-55% is an ideal level to maintain. If you’re seeing higher than 60% humidity in any area of your home, you’re going to be susceptible to mildew and bacteria growth.

Remember, attic ventilation allows your home to “breathe” so you want to balance your intake and exhaust to ensure that what is coming in is going out equally. The best ventilation system will include soffit vents which are installed underneath the overhang of the roof to take in the air and ridge vents which are installed at the top of the roof for the hot air to escape. For this method to work efficiently, all louvered vents must be sealed off and you have to ensure that your insulation isn’t blocking the airflow. Believe it or not, most roof manufacturers will void the warranty if a proper ventilation system is not installed. Luckily, new roofing technology enables contractors to add intake ventilation directly into the roof as opposed to using soffit vents so if you’re in the market for a new roof, be sure to ask for that option.

It’s important to note that homes have different characteristics and what works well for one may not work well for another. With the right balance of air, homeowners can optimize their home’s health but it’s always a good idea to get advice from a professional before taking on a big remodeling project. Stay cool friends, and have a Happy 4th of July!

Bob O’Donnell is the owner of O’Donnell Bros. Inc., a Bristol-based home improvement company established in 1975. Email your questions for Bob to info@odonnellbros.com with the subject line “Ask the Pro.” All questions may be considered for publication. To contact Bob for your remodeling needs, call O’Donnell Bros. Inc. at (860) 589-5155 or visit http://www.odonnellbros.com. Advice is for guidance only.

How to Deal with Water and Mold Before They Take Hold of Your Home

Mold is a problem that most homeowners have to deal with at one time or another. It’s the damaging by-product of water and moisture that can wreak havoc on your home, and more importantly, your health. So with summer on the way, now is a good time to inspect your house for mold and get rid of it before it does any kind of serious damage. But first, it’s a good idea to learn a little more about this pesky organism and why it demands to be treated so seriously.

You might be familiar with mold (otherwise known as mildew) from your shower or bathtub. Since the shower is often wet and the tiles are waterproof, water can sometimes seep into the grout, which, if it’s old and can’t handle its repelling duties properly, will become a breeding ground for mildew. So you’re left with microscopic organisms that feed off the moisture, allowing it to grow until you nail it with some Tilex and wait for the next clean. But what happens when mold starts to grow in the places you can’t reach to scrub – places like your ceiling, inside walls or attic? You’re probably saying, “Not in my house”. Well, guess again.

At least half the homes I visit for improvement and remodeling projects have a major mold problem and the owners don’t even know it. How? Because mold generally grows in places that you can’t see – like inside the walls and in the attic. What most people don’t realize is that mold reproduces, or grows, by releasing spores that you’re breathing in day after day.

How common is this? If you’ve ever had a leak, you’ve most likely had a mold problem. So what can you do about it? You can prevent mold by ensuring your home stays dry. Here are my top tips:

1. Keep your gutters and downspouts clean and clear so water can drain away from your house.
2. Don’t let a leaky roof go unfixed.  Get it patched up immediately and ask your contractor to inspect for any mold growth.
3. Make sure the ground around your house doesn’t slope inward towards the foundation where water can idle.
4. Inside the house, beware of any discoloration in the ceiling.
5. Ensure high moisture areas like bathrooms are well ventilated with good ceiling fans.
6. If a leak has poured into the carpet, don’t just leave it to dry. A damp area can attract mold in less than 48 hours.
7. Ensure large appliances such as refrigerators and washing machines aren’t leaking and have a catchment tray in the event of a malfunction.
8. If you use a humidifier, make sure it’s cleaned and the water is changed regularly.
9. If you feel that your house or basement has a high level of moisture, consider purchasing a dehumidifier to regulate the humidity and remove any excess moisture from the air.

If you’ve had a mold problem that you’ve tried to control by scraping, cleaning and repainting the area, don’t make the same mistake twice. If the mold keeps coming back, that means the issue runs deeper than the eye can see. It’s time to call in the pros.

Bob O’Donnell is the owner of O’Donnell Bros. Inc., a Bristol-based home improvement company established in 1975. Email your questions for Bob to info@odonnellbros.com with the subject line “Ask the Pro.” All questions may be considered for publication. To contact Bob for your remodeling needs, call O’Donnell Bros. Inc. at (860) 589-5155 or visit http://www.odonnellbros.com. Advice is for guidance only