Closed cell spray foam insulation has long been promoted as a high-performance solution for reducing heat loss in homes, particularly in loft and attic spaces. However, its misuse or poor installation can cause severe structural issues—most notably, rotting timber battens and roof deterioration. This article presents a detailed case study of a homeowner’s experience with timber batten rot caused by closed cell spray foam, and how Smart Solutions 365 provided a complete, professional solution through roof replacement and foam removal.

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What Are Timber Battens and Why Are They Important?

Timber battens are thin strips of wood installed horizontally across roof rafters to support roofing materials such as tiles or slates. These battens are vital for:

• Ensuring even tile spacing

• Providing structural support

• Facilitating ventilation beneath the roof covering

When these battens are compromised, the entire roofing system becomes unstable—posing risks of leaks, tile displacement, and, in worst cases, roof collapse.

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Case Study: The Problem with Closed Cell Spray Foam in a Loft

The Background

A homeowner contacted Smart Solutions 365 after noticing roof sagging, damp odors, and cold spots in their loft. Upon inspection, our team discovered that closed cell spray foam insulation had been applied directly to the underside of the roof tiles and battens, which is not recommended in most circumstances.

Key Issues Identified:

• Trapped moisture between foam and timber, causing rot

• Inability for the timber battens to “breathe”

• Significant decay in battens and rafters

• Undetectable damage due to foam covering

• Mortgage refusal upon home inspection

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Why Closed Cell Spray Foam Causes Timber Batten Rot

Closed cell spray foam forms a rigid, airtight barrier that blocks airflow. While this can reduce drafts, it also prevents natural moisture evaporation, particularly in roofing systems that rely on ventilation to keep timbers dry. When foam is applied directly to or near battens and tiles:

• Minor roof leaks go unnoticed beneath the foam

• Moisture accumulates, leading to wood decay

• The battens and rafters soften, weaken, and eventually fail

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Smart Solutions 365’s Professional Response

Our team at Smart Solutions 365 implemented a full-service solution to address the issue, focusing on safety, compliance, and long-term performance.

1. Detailed Roof Inspection

Using non-invasive moisture meters and structural assessment tools, we mapped the extent of:

• Timber batten rot

• Moisture penetration

• Foam adhesion across roof elements

2. Safe Spray Foam Removal

To access the battens and properly assess their condition, our specialists carried out a careful removal of the spray foam using:

• Precision tools to avoid further timber damage

• Dust control systems for homeowner safety

• Waste collection via our licensed waste disposal service

3. Full Roof Strip-Out and Timber Replacement

Due to the extent of the rot, the only viable solution was a complete roof replacement. This included:

• Removal of all compromised battens, rafters, and tiles

• Installation of pressure-treated timber battens

• Application of breathable membranes for optimal ventilation

• New roof coverings compliant with building regulations

4. Approved Re-Insulation

Post-repair, we provided an alternative insulation system using:

• Breathable mineral wool or natural fibre insulation

• Fully mortgage-approved, moisture-safe materials

• Future-proofing against damp and condensation

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The Result: Structural Integrity Restored

After the project:

• The home had a brand new, structurally sound roof

• All damaged battens and spray foam were safely removed

• The property was compliant with mortgage and insurance standards

• Future ventilation and moisture control were fully addressed

 

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Homeowner Feedback

“I had no idea the spray foam was hiding so much damage until it was too late. Smart Solutions 365 were professional from start to finish—clear in communication, efficient in removal, and absolutely skilled in rebuilding our roof. I feel confident in the safety and value of my home again.”
— Homeowner, Somerset

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Why Choose Smart Solutions 365?

Smart Solutions 365 offers a comprehensive solution to spray foam-related damage, including:

• ✅ Professional spray foam insulation removal

• ✅ Roof timber and batten assessments

• ✅ Structural repairs and complete roof replacements

• ✅ Licensed waste carriers and compliant disposal

• ✅ Installation of breathable, mortgage-approved insulation systems

With years of industry experience, we ensure your property remains safe, structurally sound, and mortgage-ready.

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Know the Risks Before You Insulate

Closed cell spray foam may offer short-term thermal gains, but when applied incorrectly—especially in older roof structures—it can cause long-term damage, hide critical issues, and even result in full roof failure. Always consult a qualified professional and choose insulation methods that allow your property to breathe.

If you’re experiencing issues with spray foam or have concerns about timber rot in your loft, Smart Solutions 365 is here to help.

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Get In Touch with Smart Solutions 365

📞 Call Today: CLICK TO CALL: 0800 061 4828
🌐 Visit Us: https://smartsolutions-365.co.uk
📧 Email: info@smartsolutions-365.co.uk

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