clock icon
Mon - Fri 09:00 - 18:00
clock icon
07506 217368
logo
logo

DAZZLE & SHINE BLOG

Is moss bad for roofs?

July 2023

Moss is a common sight for many roofs in the UK, it thrives in damp and shaded conditions. Not only can moss cause expensive damage to your roof, it can also make your roof look dull and unattractive. In this blog we will explain why moss grows on roofs and the damage it can cause if left untreated.

Why does moss grow on roofs?


Moss requires moisture to survive and reproduce. Roofs are susceptible to retaining moisture from rainfall, dew, or condensation, especially in areas with high humidity or frequent rain which is why many roofs in the UK suffer from moss growth. Many roofing materials also have a rough or porous texture that provides a suitable surface for moss to attach and grow such as asphalt shingles, wood or tiles.

Moss reproduces through spores, which can be carried by wind or other means to settle on roofs. Once a spore finds a suitable environment, it can germinate and establish a moss colony. To prevent or manage moss growth on roofs, it's important to address the contributing factors. Regular roof maintenance, including clearing debris, improving ventilation, trimming overhanging branches and using preventive treatments, can help deter moss from taking hold and spreading. If moss growth becomes a significant issue, seeking professional roof cleaning services is advisable.

What is moss?

Moss is a general term used to describe a range of non-vascular plants that thrive in damp environments. These tough plants are some of the hardiest and fastest-growing species out there, capable of rapidly spreading over a roof in a short period of time. Despite its resemblance to common garden weeds, moss is often even more persistent, adapting to climates that might defeat other weeds. It's crucial to take action to prevent or remove moss from making itself at home on your roof.

Why is moss bad for my roof?

1. Water retention - one of the most concerning aspects of moss growth on roofs is its water-retaining properties. Moss can act like a sponge, trapping moisture against the roof's surface. Over time, this retained moisture can permeate roofing materials, leading to degradation, rot and the growth of other harmful microorganisms.

2. Structural damage - as moss grows and expands, it can penetrate beneath shingles or tiles, lifting them and compromising their secure attachment. This creates opportunities for water infiltration and leaks, which can lead to structural damage, deterioration of sheathing and even interior water damage.

3. Increased weight - the added weight of water-saturated moss can strain the roof's structure. This is a particular concern for older roofs or those with weakened support systems.

4. Ice dams - in colder climates, moss can exacerbate the formation of ice dams in gutters. Moss retains moisture, which can freeze during winter, contributing to ice dam formation and the associated problems.

5. Falling moss - moss can fall from the roof and block gutters which can prevent them from doing their job of directing rain water away from your property, which can cause its own set of problems. Falling moss can also land on the floor, which is not only unsightly it can also be a slip hazard.

How can I stop moss growing on my roof?

To prevent moss growing on your roof, the best approach involves creating a dry surrounding environment. This can be achieved through a series of strategic measures. Begin by carefully trimming trees and shrubs to minimise excessive shading, this will reduce moisture accumulation on the roof. Ensuring the proper functioning of your gutters is also important, as they play a crucial role in efficiently diverting rainwater away from the roof.

However, these precautions are only the starting point. Regular maintenance routines for your roof are imperative, particularly focusing on the shaded recesses where moss tends to thrive such as around chimneys, vents and any areas prone to debris accumulation. Additionally, maintaining a proactive stance against any moss growth is vital. Anticipating and addressing moss-related concerns promptly will undoubtedly help in keeping your roof moss-free.

How do professionals clean moss off roofs?

Professionals typically use a combination of techniques and specialised equipment to safely and effectively clean moss off roofs. Cleaning moss off roofs is a delicate process, as it must be done without causing damage to the roofing materials. Here's an overview of the steps professionals may take to clean moss off roofs:

1. Assessment - the roof is carefully inspected to assess the extent of moss growth, the type of roofing material and any potential underlying issues.

2. Debris removal - before tackling the moss itself, any debris, leaves, twigs, or other organic matter is removed from the roof. This helps improve access to the moss and prevents further moisture retention.

3. Pre-treatment - in some cases, professionals may apply a moss-killing solution or biocide to the affected areas. This solution helps weaken the moss and prepare it for removal.

4. Gentle brushing - using specialised tools, professionals gently brush away the moss from the roof's surface. Care is taken not to apply excessive pressure that could damage the roofing materials.

5. Low-pressure washing - soft washing equipment is often used to apply a mixture of water and a specialised cleaning solution to the roof. This low-pressure technique helps break down and dislodge the remaining moss, algae, or other contaminants.

6. Post-cleaning inspection - after the cleaning process, professionals conduct a thorough inspection to ensure all moss has been removed and to identify any areas that may require further attention.

Roof cleaning in Essex

At Dazzle and Shine, we understand just how important it is to maintain a clean and beautiful roof. Our professional roof cleaning services in Essex will leave your roof looking pristine and in good condition. Our team of roof cleaning experts in Essex are highly trained and experienced in handling a wide range of roofs and cleaning challenges. We possess in-depth knowledge of different roofing materials and understand the most effective methods to clean and restore their original beauty.

We use the latest equipment and tools specifically designed for roof cleaning to achieve outstanding results. Our state-of-the-art machinery allows us to access hard-to-reach areas and efficiently remove dirt, moss, algae, stains and other contaminants from your roof.

So if you are based in Essex and your roof is in need of a good clean, contact us today for a free consultation! Let Dazzle and Shine take care of your roof, so you can enjoy a cleaner, brighter and more attractive home.




Call us for a quote
07506 217368

Dazzle and Shine Exterior Cleaning Ltd
Dazzle and Shine Exterior Cleaning Ltd