You can’t install new cladding on a broken frame.
Before any compliant cladding system can be installed, the substrate — the wall framing, battens, and cavity structure behind the panels — needs to be in the right condition. Structurally sound. Moisture-free. Correctly dimensioned for the new system.
In cladding replacement projects, the substrate is often compromised. Years of water infiltration through the old, defective panels means rot, corrosion, and delamination are common — and they’re usually invisible until the old panels come off.
At Atomic Projects, substrate repair and re-battening is a first-principles discipline. We don’t assume the frame is fine. We inspect it, test it, and fix what needs fixing — before a single new panel goes on.
1. What We Look For
After stripping the old cladding, our team carries out a systematic substrate assessment:
- Moisture readings across all framing members
- Visual inspection for rot, corrosion, and delamination
- Structural verification — stud and nogging integrity, fixing points
- Cavity depth and batten spacing check against new panel system requirements
- Fire barrier locations — confirm cavity barriers are positioned correctly
2. Substrate Repair Works
Depending on findings, our substrate repairs may include:
- Replacement of rotted or structurally compromised timber framing
- Treatment and replacement of corroded steel stud framing
- Application of penetrating preservatives to in-place timber
- Repair of wall sheeting or waterproof membranes behind the original cladding
- Rectification of any structural defects identified — in consultation with a structural engineer where required
3. Re-Battening
New battens are installed to the specifications of the incoming cladding system:
- Treated pine battens or steel top-hat sections — selected by fire engineer and cladding system spec
- Fixing centres per manufacturer’s installation guidelines
- Cavity depth sized to accommodate sarking, cavity barriers, and panel system
- Horizontal and vertical alignment surveyed before proceeding
4. Why Atomic Projects
A cladding system is only as good as what’s behind it.
We make sure your substrate and battens are structurally sound, moisture-safe, and compliant — ready for a flawless install.
Frequently Asked Questions
Why does the substrate need to be assessed before new cladding is installed?
The substrate is the structural foundation of the entire cladding system. Installing new panels over rotted battens or corroded framing is a false economy — the new system will fail prematurely and moisture damage will continue to spread. Rectifying the substrate at this stage is far cheaper than addressing panel delamination or structural failure in five years.
How do you detect moisture damage before removing the old cladding?
We use moisture meters, thermal imaging (in some cases), and targeted probe openings to assess substrate condition before full cladding removal commences. This allows us to scope re-battening works accurately and flag structural concerns to the engineer before work begins. Where substrate condition is uncertain, we price a provisional sum at tender and true it up once panels are removed.
What materials do you use for replacement battens?
We install either treated pine battens or steel top-hat sections depending on the cladding system specification, fire engineer’s requirements, and substrate conditions. Steel framing is preferred in high-moisture or coastal environments where timber longevity is a concern. All materials comply with NCC requirements and manufacturer installation guidelines for the new cladding system.
Does re-battening add significantly to the project programme?
Re-battening is typically fast once old panels are removed — a standard residential floor can be re-battened in one to two days by our experienced crews. The biggest programme variable is the extent of structural repairs needed if framing damage is discovered. We carry out a rapid substrate assessment immediately after panel removal to update the programme and notify the OC of any variations.
Can you coordinate substrate works with other trades on site?
Yes — substrate repair and re-battening is fully integrated into our project programme. Where window replacement, structural repairs, or cavity barrier installation are happening concurrently, our site foreman coordinates sequencing to avoid conflicts. This is particularly important on occupied residential buildings where scaffold sections must be managed carefully.
