Complete Guide to 19 x 125 Shiplap Treated Cladding Installation Options and Maintenance Tips
- Phil Bryant
- 2 days ago
- 3 min read
In this Complete guide to 19 x 125 shiplap cladding we look at the different options, installation and treatment. The 19 x 125 shiplap treated cladding stands out for its durability and ease of installation, making it a favourite among homeowners and builders. This guide explores the different product options available, installation methods, and maintenance tips to help you get the most from your shiplap cladding.
Understanding 19 x 125 Shiplap Treated Cladding
The term "19 x 125" refers to the thickness and width of the timber boards, where as the term "fin" refers to the finished size of the boards of 15 x 120, measured in millimetres. This size strikes a balance between strength and aesthetic appeal. The boards are treated to resist rot, insects, and weather damage, extending their lifespan significantly compared to untreated timber.
Key Features
Durability: Treatment protects against moisture and pests.
Appearance: Smooth, overlapping edges create a neat, horizontal line.
Versatility: Suitable for both exterior walls and interior feature walls.
Ease of Use: Boards are lightweight and easy to handle.
Product Options for 19 x 125 Shiplap Cladding
When selecting shiplap cladding, consider the length, treatment method, and finish options.
Types of Wood
Softwood (e.g., Pine, Spruce)
Common and cost-effective, softwood is easy to work with but requires thorough treatment to ensure durability.
Hardwood (e.g., Cedar, Oak)
Naturally resistant to decay, hardwoods often need less chemical treatment but come at a higher price.
Treatment Methods
Pressure Treatment
This method forces preservatives deep into the wood, offering long-lasting protection against rot and insects.
Surface Treatment
Wood is coated with preservatives on the surface. It is less durable than pressure treatment but can be effective with regular maintenance.
Finishing Options
Paint
Provides a wide range of colors and additional protection but requires regular upkeep.
Stain
Enhances the natural grain while protecting the wood; stains penetrate the surface and last longer than paint.
Clear Sealant
Maintains the natural look but offers less protection against UV damage and weathering.
How to Install 19 x 125 Shiplap Treated Cladding
Installing shiplap cladding requires careful preparation and attention to detail to ensure a secure and attractive finish.
Tools and Materials Needed
Shiplap boards (19 x 125 treated timber)
Galvanized or stainless steel nails
Spirit level
Measuring tape
Saw (circular or hand saw)
Hammer or drill
Protective gloves and goggles
Weather-resistant membrane (optional)
Step-by-Step Installation Guide
Prepare the Surface
Ensure the wall is clean, dry, and structurally sound. If installing externally, consider adding a weather-resistant membrane to protect the wall.
Measure and Mark
Use a spirit level to mark a straight horizontal line at the base where the first board will sit.
Start at the Bottom
Fix the first shiplap board at the base, ensuring it is level. Use galvanized nails or screws to prevent rust.
Overlap Boards Correctly
Each board should overlap the one below by the shiplap groove, creating a tight seal that sheds water effectively.
Maintain Consistent Spacing
Check alignment regularly to keep boards straight and evenly spaced.
Cut Boards to Fit
Use a saw to trim boards at corners, windows, or doors for a neat finish.
Secure All Boards
Nail or screw each board firmly into the wall studs or battens.
Tips for a Smooth Installation
Work in dry weather to avoid moisture issues during installation.
Pre-drill holes to prevent wood splitting.
Leave a small expansion gap at edges to accommodate wood movement.
Maintaining Your 19 x 125 Shiplap Treated Cladding
Proper maintenance extends the life of your cladding and keeps it looking fresh.
Regular Cleaning
Wash the cladding annually with mild detergent and water.
Use a soft brush to remove dirt and debris.
Avoid high-pressure washers as they can damage the wood surface.
Inspection and Repairs
Check for signs of rot, insect damage, or loose boards twice a year.
Replace or repair damaged boards promptly.
Reapply paint, stain, or sealant every 3 to 5 years depending on exposure.
Protecting Against Moisture
Ensure gutters and downspouts direct water away from cladding.
Trim back plants and shrubs to allow airflow and prevent dampness.
Maintain proper drainage around the building foundation.
Choosing the Right Finish for Longevity
The finish you select impacts both the appearance and durability of your shiplap cladding.
Paint offers the most colour options but may peel or crack over time.
Stain enhances natural wood tones and penetrates deeper for longer protection.
Clear sealants preserve the wood’s natural look but require more frequent reapplication.
Consider your climate and desired look when choosing a finish.
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