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How To Stop Condensation On Metal Roofs

Metal Roofs Taunton

It is possible to prevent condensation from forming on your metal sheets by taking certain precautions. Here are a few tips from our roofing team on how to prevent condensation on roof sheets.

1. Keep the area around the edge of the roof dry

Condensation forms when water vapour in the air comes into contact with cold surfaces, such as metal roofs and walls. The most common cause of this is when rainwater runs off the roof and hits cold areas like gutters or downspouts. If you have any standing water on your roof, it will create a perfect environment for condensation and water damage.

2. Make sure there’s no moisture inside the building

If you notice that your home has unusually excess humidity, check to see if there are leaks in the roof or windows. Water can enter through these openings and then collect on the exterior of the house. This can lead to condensation problems.

3. Seal up all cracks and holes

Cracks and holes in the roof allow water to penetrate the structure. You should seal them up so they don’t let water in.

4. Install attic fans

Attic fans help keep the air circulating in the attic, keeping it cooler than the rest of the house. They also reduce humidity levels in the attic.

5. Roof Pitch

Low pitch roofs are more likely to have a condensation issue. A low pitched roof makes it difficult for water droplets to slide the roof slope making them accumulate and eventually enter your house. A corrugated metal roof is better placed in terms of letting excess water flow preventing water accumulation.

A steep pitch prevents moisture and water droplets from staying put on the roof thus eliminating the possibility of water or moisture entering your building.

6. Ensure proper ventilation and air circulation

Ventilation helps remove excess heat from your building which reduces the chances of condensation. It also allows warm air to escape and cool air to come in.

7. Use dehumidifiers

Dehumidifiers work by pulling water vapour out of the air. These molecules get trapped in the device and are later released back into the atmosphere. Dehumidifiers are beneficial because they take care of excessive humidity levels in the air.

8. Be aware of weather conditions and patterns

The best time to install a dehumidifier is during periods of high humidity. During the winter months, installing a dehumidifier may be unnecessary because the temperature is much lower. In summer, however, installing a dehumidifier would be beneficial.

9. Roofing material

Metal roofing materials are prone to condensation issues. In order to prevent this from happening, the metal roof should be insulated so that the panel temperature never reaches the dew point.

10. Check for signs of leakage

Check for signs of leaking at the edges of the roof. Look for dripping or puddles of water near the eaves. If you find any, call a professional immediately.

11. Improper Construction Techniques

Improper construction techniques can make your roof prone to developing excess moisture that develops into condensation. Make sure that your contractor uses correct installation methods so that your roof doesn’t develop condensation issues.

12. Poorly Maintained Roof

Poorly maintained roofs can become damaged over time. This can lead to the development of condensation.

What Can Condensation Do to Your Roof?

Condensation on roof sheets can cause damage to the sheet itself, such as rust, corrosion, and even pitting. It also causes problems with the appearance of the roof, which could lead to leaks in the future.

The best way to prevent these issues is to keep your roof dry. If you live in a humid climate, you’ll want to make sure that your roof is well ventilated so that the moisture doesn’t build up.

Use Anti-condensation Roofing Sheets

You may want to consider using special anti-condensation roof sheets if you’re worried about having issues with condensation. To protect your roof from moisture, these sheets feature thick insulation of an anti-condensation membrane. As the membrane absorbs water, it prevents it from condensing and trickling down. The membrane dries out when the air becomes warmer, and the stored water evaporates.

If you do decide to use these types of roofing sheets, make sure that you have them installed correctly.


Is condensation a problem with metal roofs?

Yes, metal roofs are likely to have condensation problems which leads to corrosion and shorter roof lifespan.

Why is my tin roof sweating?

The difference in temperature between the inside and outside of the roof results in humidity and condensation leading to water droplet formation on your roof.

Does a metal roof need a vapour barrier?

Yes, to ensure condensation does not form on metal roofs and buildings, the roofs and buildings must be sufficiently insulated and vapour-proofed.

See our last post here: How To Stop A Leaking Roof During Heavy Rain