Our garden sheds are our pride. In fact, when some homeowners need undisturbed moments, they get to the shed for a little peace.
How to waterproof a shed roof is essential to learn because once rain seeps in, the interior will be dump, smell bad, and have molds. Additionally, water will damage the expensive equipment you store inside. Moreover, the area will be unpleasant to spend even a little time when you need some rest.
A good shed roof will protect your expensive equipment like lawnmowers, strimmers, and other garden tools. Further, your shed will last for years because most materials like wood that rot easily are protected. That aside, metallic sheets will not rust quickly.
In summary, waterproofing a shed roof is essential for your items. Thankfully, the exercise requires some simple products like silicone. On the other hand, a roofing substrate can also protect your roof. Read on to learn more.
- How to Identify Leaking Areas on a Shed Roof
- How to Waterproof a Shed Roof: All the Requirements of Roofing
- 1. Choose the best roofing materials
- 2. Choose the correct substrate
- 3. Clean the gutters
- 4. Clear Climbing Plants from the shed roof
- 5. Choose the best shed roofing design
- How to Waterproof a Shed Roof After Meeting the Above Requirements
- Step 1: Removing Rust from Shed Roof
- Step 2: Apply Silicone Sealant
- Step 3: Paint the roof with metal roof paint
- List of Best Shed Roofing Sealants
- 1. Everbuild Black Jack 901 Black Bitumen Paint 5 Litres
- 2. All-Weather Roofing Compound Bitumen Waterproof Roof Coating 25 Litre
- 3. Aquashield by Britannia Paints Acrylic Waterproofing Roof Coating
- FAQs About How to Waterproof a Shed Roof
- Should You Waterproof the Inside of a Shed?
- Is Shed Roofing Felt Waterproof?
- What Should I Put on Top of My Shed Roof?
How to Identify Leaking Areas on a Shed Roof
Check for leaks on the roof when it’s raining or immediately after the rain stops. Delaying after the rain has stopped can give you a hard time identifying the leaking points.
When inspecting the roof, check for dampness on the roofing area, discolored wooden bars, and drips coming from the ceiling.
Once you have identified the spots, you can mark them and repair rotten wooden bars before applying any waterproofing material.
How to Waterproof a Shed Roof: All the Requirements of Roofing
After meeting these requirements, you can later apply some waterproofing products. Take a look;
1. Choose the best roofing materials
Felt, shingles, and lightweight metal sheets are commonly used in shed roofing. They are water-resistant but have different life spans.
For instance, felt materials can last for around 10 years, whereas metal sheets can go for 25 years. However, this is the average estimation because different areas have different climates and weather, which can reduce their lifespan.
2. Choose the correct substrate
A substrate is a material that the roofing sheets are laid on. It protects the plywoods on the ceiling and other materials from water if it seeps in.
Applying a substrate will effectively protect the shed from rain and insulate the shed during the hot season.
However, ensure the roofing material fits well on the roof to direct the water where necessary.
3. Clean the gutters
Debris, dust, and leaves settle on the gutters, especially during windy seasons. As such, they clog the waterways, and once the water fills the gutter, it floods the roof.
Later, it will find its way inside the shed and cause damage. Ideally, clean the gutters before rain season and regularly during the season.
4. Clear Climbing Plants from the shed roof
Climbing plants spread on the roof and cause the water to flood once it rains. It’s wise to clear all climbing plants from the roof to protect the metal sheets from rusting and water seeping in.
5. Choose the best shed roofing design
Designs like skillion and gable have a good pitch that easily directs water to the gutters. A pitch of 4/12 is recommendable because it enables easy water flow even during heavy rains.
Additionally, snow will also flow easily during winter.
How to Waterproof a Shed Roof After Meeting the Above Requirements
With time, shed roofs can leak even after meeting the above requirements. For instance, metal roofing sheets may have rusted due to acid rains. In another case, bird poop can also quicken the rusting process.
With that said, you need first to treat rust on the metallic roofing materials before waterproofing.
Step 1: Removing Rust from Shed Roof
Use an extension ladder to climb and scrub the metal sheets with a stiff wire brush to remove the rust. You will have to wear a mask and glove because of the dust.
Start from one edge of the roof and scrub, moving downwards until most of the rusts clear.
However, if the material is much corroded, it may develop holes that cannot be sealed. In this case, you will have to replace the metal sheets.
After scrubbing, wash the roof with Trisodium Phosphate. Mix one cup of trisodium phosphate per one gallon of water and wash the roof.
Step 2: Apply Silicone Sealant
Insert the silicone caulk into the caulk gun and apply it to all leaking joints and holes. Also, apply on fasteners, nails, and screw heads and wait for around 24 hours before repainting.
Ideally, carry out the process on a sunny day for the silicone to cover the leaking spots effectively.
Step 3: Paint the roof with metal roof paint
Apply primer before repainting the whole roof. We recommend Rust-Oleum Marine Metal Primer.
Afterward, open the metal paint canister and mix it according to manufacturer instructions. Most have particles that bind with the metal surface to form the best waterproofing coat.
However, it’s important to apply primer because some brands may not be much effective.
After mixing, attach the paint roller to the extension handle and apply from one edge while stepping on an extension ladder.
Start from the top, move downwards, and apply a thick layer.
List of Best Shed Roofing Sealants
Applying quality sealant is the cheapest way to waterproof shed roof. Take a look at various sealants.
1. Everbuild Black Jack 901 Black Bitumen Paint 5 Litres
The blackjack sealant is my favorite sealant. It can protect corrugated iron sheets and is also good for timbers. It has proper adhesion, and it’s also easy to use.
2. All-Weather Roofing Compound Bitumen Waterproof Roof Coating 25 Litre
The sealant can be applied to alloy steel, iron, aluminum, and metals. All-weather roofing compound resists water immediately upon application.
3. Aquashield by Britannia Paints Acrylic Waterproofing Roof Coating
Aquashield is compatible with alloy steel, fiberglass, and metal. It effectively seals the cracks and gaps.
See also: Cheapest shed insulation diy
FAQs About How to Waterproof a Shed Roof
Should You Waterproof the Inside of a Shed?
You can waterproof the inside of a shed, but it will be much more effective after waterproofing the exterior.
See also: Best way to clean inside a wooden shed
Is Shed Roofing Felt Waterproof?
Felt is very effective in shed roofing. It offers waterproofing and protection from all weather.
What Should I Put on Top of My Shed Roof?
You can use materials like felt, shingles, or metal sheets. You can also add a substrate before laying the roofing materials.
With that said, waterproofing a shed roof can be easier with the above-recommended sealants.