Emilie Meyer
Jamsill Guard® is a pan flashing product designed to prevent water damage from leaks in doors and windows. It is made from high-quality, high-impact ABS plastic, which does not deteriorate or corrode over time. The product is known for its durability and leak-free installation for siding and trim, doors and windows, roofs, decks, and exterior finishes. Installation involves bending, cutting, folding, and gluing. The Jamsill Guard® can be custom-cut to fit any size rough opening, and trimmed down using a hacksaw or tin snips.
How to Install Jamsill or Pan Flashing
| Characteristics | Values |
|---|---|
| Purpose | Weatherproofing and waterproofing for door and window sills |
| Material | PVC, ABS plastics |
| Installation | Quick, simple, and adjustable |
| Cutting | Custom-cut to fit any size rough opening |
| Bonding | Use PVC cement, bonding times vary depending on temperature and humidity |
| Overlap | Minimum of 1 1/2" overlap at each joint for proper bonding |
| Tools | Hacksaw, tin snips, vinyl coil, PVC adhesive |
| Flexibility | Can be trimmed and adjusted to fit during installation |
| Durability | Leak-free, will not deteriorate or corrode over time |
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What You'll Learn
Cutting and trimming
Planning the Cut
Before making any cuts, it's important to measure and plan the trimming process carefully. Measure the rough opening dimension and decide if you need to order a custom-cut sill pan or trim down the centre section of a larger size. If trimming is required, measure the exact amount of material that needs to be removed from the centre piece. Ensure that the trimmed centre piece will fit within the recessed glue tab areas while maintaining the required overlap. The recommended overlap is at least 1 1/2" at each joint for proper bonding.
Tools for Cutting
For the cutting process, you can use a hacksaw or a pair of tin snips. Choose a tool that you are comfortable with and that will provide a clean and precise cut. A hacksaw is suitable for straight and long cuts, while tin snips can be useful for shorter cuts and manoeuvring around curves or intricate details. Ensure your chosen tool is in good condition and sharp enough to cut through the material without causing any damage or deformation.
Cutting Process
When cutting the jamsill or pan flashing, follow a steady and controlled approach. Mark the cutting line clearly to ensure accuracy. If using a hacksaw, position the sill pan securely on a workbench or sawhorse and clamp it down if possible. This will provide stability and help ensure a straight cut. Gently apply pressure as you saw along the marked line, taking your time to avoid any jagged edges or deviations from the cutting line. If using tin snips, grip the flashing firmly and cut along the marked line with steady, controlled snips. Take care to avoid any sharp edges or burrs that could be hazardous.
Trimming and Adjustments
After cutting, you may need to trim the flashing further to ensure a precise fit. Trimming might be necessary to accommodate specific details, such as the stool detail of a window or the unique contours of a door installation. Use tin snips or a utility knife for trimming, carefully cutting away small sections at a time. Always try to cut away less material than you think you need, as you can always trim more, but you can't add back what you've cut off. Smooth any sharp edges with a file or sandpaper to ensure a safe and neat finish.
Bending and Folding
In addition to cutting and trimming, you may need to bend and fold the flashing to fit certain contours or to create custom shapes. This process usually requires a brake, a specialised tool that allows you to make precise bends and creases in the material. If you have a vinyl coil, you can use it to create the desired bends and shapes. Always follow the manufacturer's instructions or seek guidance from experienced installers when bending and folding flashing to avoid accidental damage.
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Bending and folding
Firstly, it is important to have the right tools for the job. A brake, vinyl coil, and PVC adhesive are essential for bending and folding. The type of adhesive used is important; hot PVC adhesive is recommended for a strong bond.
When bending the jamsill or pan flashing, it is crucial to follow the appropriate sequence to achieve the desired shape. The bending process involves carefully manipulating the material to create the necessary angles and curves. This can be done using a brake, a tool specifically designed for bending metal or vinyl coil. The brake allows for precise bends, ensuring that the flashing fits perfectly around the desired installation area.
For folding, the vinyl coil is folded along pre-determined lines to create a neat and accurate finish. This process requires careful measurement and marking to ensure that the folds are straight and aligned correctly. It is important to take your time during the folding process to avoid any creases or uneven edges that could impact the final installation.
In some cases, you may need to reshape the flashing by making new bends or adjusting existing ones. This can be done using a heat gun to soften the material and then carefully bending it to the desired shape. This technique can be useful if you need to accommodate a specific window or door size, such as a 2x4 window sill, as mentioned by a user who had to reshape their jamsill product.
Additionally, it is worth noting that some users opt to use a soldering iron for the bending and folding process, especially when working with pans. This tool can provide more precision and control over the final shape of the flashing.
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Using PVC cement
Jamsill Guard is an adjustable sill pan flashing designed to prevent water damage from window and door leaks. It is made from quality, high-impact ABS plastics and will not deteriorate or corrode over time. Its multi-piece telescoping design allows on-site adjustability to fit all rough openings and features sloped weep areas to help evacuate moisture to the exterior of the structure.
Jamsill Guard is bonded together in the field using PVC cement, creating a one-piece sill pan flashing beneath your door or window. The PVC cement sets up and dries quickly, making it a good solution for waterproofing door and window sills.
To install Jamsill Guard using PVC cement, follow these steps:
- Prepare the surface: Ensure that the area where you will be installing the Jamsill Guard is clean and dry. Remove any debris or old sealant from the door or window sill.
- Cut the Jamsill Guard to size: Measure the width and length of your door or window sill and cut the Jamsill Guard accordingly. It is adjustable and easy to cut to size.
- Apply the PVC cement: Using the provided applicator brush, apply a generous amount of PVC cement to the underside of the Jamsill Guard and the surface to which it will be bonded.
- Bond the Jamsill Guard: Firmly press the Jamsill Guard into place, ensuring good contact with the surface. Hold it in place for a few seconds to allow the PVC cement to begin setting.
- Smooth the edges: Use a putty knife or a similar tool to smooth out any excess PVC cement and create a neat finish.
- Allow it to dry: The PVC cement sets up quickly, but it is advisable to let it cure for at least 24 hours before exposing it to moisture.
It is important to work quickly as PVC cement has a fast drying time. Always follow the manufacturer's instructions and safety guidelines when working with PVC cement.
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Using a hacksaw or tin snips
When installing jamsill or pan flashing, you may need to trim the centre piece to ensure a proper fit. Measure how much material needs to be removed and use a hacksaw or tin snips to make the cut.
If you are using a hacksaw, place the centre piece on a stable work surface and secure it with a clamp or vise to hold it in place. Position the hacksaw blade on the marked cutting line and apply firm, steady pressure as you push and pull the saw back and forth to cut through the material. Take your time and use a smooth, controlled motion to ensure a straight and accurate cut.
For tin snips, choose the appropriate type of snips for the cut you need to make. There are three types of tin snips: straight-pattern, left-pattern, and right-pattern. Straight-pattern tin snips can be used for straight cuts, while left and right-pattern snips are designed for making curves in different directions. Hold the tin snips in your dominant hand and the centre piece in your other hand. Position the blades of the tin snips on the marked cutting line and squeeze the handles together to cut through the material. Follow the cutting line closely to ensure a precise cut.
Whether using a hacksaw or tin snips, always wear appropriate personal protective equipment, including eye protection and gloves, to safeguard against any flying debris or sharp edges. Take your time and use the appropriate tool for the type of cut you need to make. Once the centre piece is trimmed to size, you can proceed with bonding it in place using PVC cement, ensuring proper overlap at the joints for a secure installation.
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Gluing
When installing Jamsill or pan flashing, gluing is an important step to ensure a proper seal and prevent leaks. Here is a detailed guide on the gluing process:
Materials
You will need a strong adhesive suitable for the material of your Jamsill or pan flashing, such as PVC cement or adhesive, ABS cement, or a can of Christies Red Hot Blue Glue. You may also need a cleaner to prepare the surface before gluing.
Surface Preparation
Before gluing, it is important to ensure that the surface is clean and free of debris. Use a suitable cleaner if necessary. If you are using PVC cement, the surface should be free of moisture as this can affect the bonding process.
Cutting and Trimming
Jamsill pans can be cut to fit the required size. Measure the rough opening dimension and use a hacksaw or tin snips to cut the pan to size. For PVC pans, you may need to heat and reshape the edges using a heat gun if you need to adjust the bend. Ensure that the pieces fit together properly and maintain the required overlap for a strong bond.
Follow the instructions on your chosen adhesive for the correct application method and safety precautions. Typically, you will apply a bead of glue or silicone to the surface of the flashing and/or the substrate. Press the flashing into place and hold it firmly for the recommended time to ensure a good bond. For PVC cement, the bonding time can vary depending on temperature and humidity, so take this into account.
Post-Installation
After gluing, you may need to tape the joints temporarily to hold them in place while the adhesive cures. This can also help to create a better seal. Refer to the adhesive's instructions for any specific curing requirements, such as optimal temperature or humidity conditions.
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Frequently asked questions
It is the best waterproofing for door and window sills, preventing future water damage.
It is made of quality, high-impact ABS plastics, which means it will not deteriorate or corrode over time.
You will need PVC cement, an applicator brush, and a hacksaw or tin snips if you need to cut the flashing to size.
Measure how much material needs to be trimmed and use a hacksaw or tin snips to cut. Be sure that the centre piece fits within the recessed glue tab areas and that you maintain the required overlap.
Bonding times vary depending on temperature and humidity. Typically, it takes approximately 5 minutes to bond the pieces together using regular PVC cement, but the higher the humidity and/or the colder the temperature, the longer it will take.
