Omar Khalid
Joining plastic guttering is a tricky task, and if not done correctly, it can lead to leaks. To avoid this, it is recommended to appoint a professional tradesperson to carry out the installation. However, if you are confident in your abilities and have the right tools, you can join plastic guttering lengths correctly by using joint or union brackets, which have rubber gaskets to create a watertight seal. It is important to always refer to the manufacturer's instructions for the required expansion gap and confirm compatibility before fitting.
Characteristics and Values table for joining plastic guttering
| Characteristics | Values |
|---|---|
| Joint brackets | Also known as union brackets, these are necessary when joining long runs of guttering. They have rubber gaskets to create a watertight seal. |
| Manufacturer's instructions | Refer to the manufacturer's instructions for the required "expansion gap" size, which can vary depending on the guttering type and weather conditions. |
| Safety | Working at height can be hazardous. Consider hiring a professional tradesperson who is aware of the necessary safety precautions. |
| Adaptors | When connecting old iron guttering to new plastic guttering, adaptors like the "FloPlast Round Gutter To Cast Iron Adaptor" are available but may not always work effectively. |
| Sealing | Ensure proper sealing by replacing gaskets and using gutter sealant or roofing sealant from hardware stores. |
| Compatibility | Confirm compatibility when using joint brackets, and use all screw holes to secure the bracket for stability. |
| Guttering lengths | Standard guttering lengths are 2, 3, and 4 meters and can be cut to size with a fine-toothed hacksaw. |
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What You'll Learn
Using joint brackets
Joining plastic guttering is a challenging task that requires careful planning and execution. While some people choose to hire professional tradespeople to install their gutter systems, others prefer to take on the project as a DIY endeavour. If you're considering the DIY route, it's important to ensure you have the right tools and guidance to complete the job securely and safely. Here's a detailed guide on using joint brackets to join plastic guttering:
Joint brackets, also known as union brackets, are essential when joining long runs of guttering. These brackets serve as wide support clips, ensuring a stable and watertight connection between gutter sections. Before starting, always refer to the manufacturer's instructions and confirm compatibility between the joint brackets and your gutter system. It is also recommended to have all the necessary tools and safety equipment, such as gloves and eye protection, before beginning the installation process.
Installation Process:
- Preparation: Clean the seam edges and interior of the gutter joiner pieces with rubbing alcohol. This step ensures that the surfaces are free from dirt and debris, promoting a better seal.
- Sealing: Apply a generous amount of sealant or plastic cement to the edges of the gutter sections and the inside of the gutter joiner pieces. This creates a watertight barrier, preventing leaks.
- Positioning: Position the joint bracket so that the seam is as close to its centre as possible. Ensure that the top edge of each overlapping piece is pointed in the direction of water flow.
- Securing: Snap the joint bracket firmly into place. Secure the bracket by using all available screw holes. This ensures the stability of the gutter system and prevents unwanted movement.
- Compatibility: It is important to confirm compatibility between the joint bracket and the gutter sections before installation. Most joint brackets are interchangeable, but it is always advisable to check beforehand. Contact the manufacturer or a specialised helpline if you have any concerns.
- Safety: Working at height can be hazardous. Ensure you have the necessary safety equipment and a spotter to help with the installation process. Take appropriate breaks and stay hydrated, especially if working in hot weather conditions.
By following these steps and staying cautious, you can effectively join plastic guttering using joint brackets. Remember to take your time, work with a partner if possible, and prioritise safety throughout the installation process.
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Expansion gaps
When joining plastic guttering, it is important to consider the expansion and contraction of the plastic material due to temperature changes. This movement can affect the stability of the gutter system and its ability to remain watertight. To accommodate this, expansion gaps are necessary.
Joint brackets, also known as union brackets, are widely used to join lengths of guttering securely. These brackets have rubber gaskets that create a watertight seal. When installing joint brackets, it is recommended to replace the entire fitting rather than just the seal. Most joint brackets are interchangeable, but compatibility should always be confirmed before installation. A joint bracket should be positioned at every junction between two gutter sections, and all screw holes must be used to ensure stability.
To prevent leaks, it is essential that all lengths of guttering are joined correctly. Gaskets in click joints should be replaced to maintain a proper seal. Backer rod can be used as a replacement, glued in place with gutter sealer. Sealants designed specifically for roofing and gutters can also be used to prevent leaks.
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Preventing leaks
Planning and Preparation:
Before starting any work, it is important to measure and plan the installation. Measure the roof edges along the fascia to determine the gutter length. On straight roof edges, add 1/2 inch on each side for a slight overlap. When measuring from an outside roof edge to an inside corner, subtract 5 inches to accommodate the inside box miter. Add an extra 3 to 4 inches to allow for overlapping edges when joining pieces.
Cleaning and Assembly:
Clean the seam edges and interior of the gutter joiner pieces with rubbing alcohol to ensure a clean surface. If you are using vinyl gutters, hang the gutter sections first, butting the ends together, and then apply the gutter joiner. For metal gutters, it is recommended to assemble them on the ground and then hang them.
Sealing and Fastening:
Apply a generous amount of sealant or plastic cement to the edges of the gutter sections and the inside of the gutter joiner pieces. Snap the joiners firmly into place, ensuring a tight seal to prevent leaks. Use stainless steel screws or pop rivets to secure the gutters at the sides of the joined sections, avoiding the bottom to prevent leaks.
Joint Brackets and Gaskets:
Use joint brackets, also known as union brackets, to provide extra support and create a watertight joint. Ensure there is a joint bracket at every junction between two gutter sections, securing it with all available screw holes. Check for brand-specific guidance on expansion gaps due to temperature changes, as this can cause thermal expansion and contraction, leading to leaks. Gaskets are another critical component in preventing leaks. Ensure they are free of debris when refitting to maintain a clean and strong seal.
Maintenance and Repairs:
Regular maintenance of your gutter system is crucial to prevent leaks and protect your home. Inspect your gutters regularly to identify any areas of damage or deterioration. Issues like larger leaks should be addressed immediately to prevent serious damage to your roof or walls. For smaller leaks, you can try applying more silicone or glue to the leaking joint. For more significant repairs or installations, it is recommended to enlist a professional tradesperson, especially when working at heights.
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Adaptors
Gutter adaptors are a great solution to join two different types of guttering systems, such as cast iron and PVC. They are designed to bridge the gap between the two materials, ensuring a secure and leak-free joint.
Before installing a gutter adaptor, it is crucial to ensure that the dimensions and profiles of both gutters match the requirements of the adaptor. The gutter length should be measured and cut to the appropriate size using a hacksaw or fine-tooth wood saw. Clean, straight cuts are essential for a proper fit with the gutter adaptor. The edges of the PVC gutters should then be smoothed using sandpaper or a file to create a clean surface for a secure bond.
To install the adaptor, apply a low modulus sealant into the cut end of the gutter and place the gutter adaptor onto it. Secure the adaptor using a strap, nut, and bolt. Silicone lubricant is recommended for the rubber seal. To further protect against leaks, apply silicone sealant along the joint between the two gutters and smooth it with a putty knife. Allow sufficient time for the sealant to cure, and then test the joint by running water through the gutters to ensure there are no leaks.
While gutter adaptors offer a convenient solution, they may not always be the best option. Some experts recommend alternative methods, such as installing a stop end on both systems and converting them into separate gutters. This approach ensures a more reliable and permanent solution, although it may not be suitable for every property.
It is generally recommended to consult a professional tradesperson for guidance and support in choosing the right method and ensuring a proper installation.
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Sealants
Types of Sealants
The type of sealant used for plastic guttering depends on the specific gutter material and the manufacturer's instructions. Some common types of sealants include:
- Gutter sealant: Specifically designed for roofing and gutters, this sealant can be found in the sealant section of hardware stores.
- Silicone sealant: This type is used specifically when joining cast iron and PVC gutters using a gutter adapter. It provides an extra layer of protection against leaks.
- Plastic cement: This is spread on the edges of gutter sections and the inside of gutter joiner pieces to create a strong bond.
Application Techniques
When applying sealants, it is important to follow these steps:
- Clean the mating surfaces and seams of the gutter sections and joiner pieces with a damp rag or rubbing alcohol. This step is crucial for effective sealing.
- Apply a generous amount of the appropriate sealant to the cleaned areas, ensuring complete coverage.
- Snap the gutter sections and joiner pieces firmly into place, creating a tight seal to prevent water leakage.
- For silicone sealant, allow sufficient time for it to cure completely before testing the joint by running water through the gutters to ensure there are no leaks.
Joint Brackets and Gaskets
In addition to sealants, joint brackets and gaskets play a crucial role in creating watertight connections between plastic gutter sections. Joint brackets, also known as union brackets, are wide support clips that hold gutter sections together. They typically include rubber gaskets (seals) that create a watertight seal to prevent rainwater leaks. When using joint brackets, it is important to replace the entire fitting, not just the seal, to ensure compatibility and stability.
Compatibility and Safety
When joining plastic guttering, always refer to the manufacturer's instructions for specific guidelines, including recommended expansion gaps. Working at height during gutter installation can be hazardous, so consider enlisting a professional tradesperson who can ensure safety and provide expertise in joining gutter sections securely and effectively.
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Frequently asked questions
Joint brackets, also known as union brackets, are required to join gutter lengths together. These brackets have rubber gaskets that create a watertight seal. When replacing a gutter joint, replace the entire fitting, not just the seal.
Gutter unions are simple to install. Screw them onto the fascia boards and push the gutter length into them.
Leaks are often caused by poorly joined pipes and gutter fittings. Replace the gaskets to ensure a proper seal. Use a sealant designed for roofing and gutters.
Yes, you can use an adaptor like the 'FloPlast Round Gutter To Cast Iron Adaptor'. However, adaptors may not work as well as a direct connection. You can also cut both ends and apply fibreglass and a top coat of sealant to the joints.
