The Hidden Risks of Cavity Wall Insulation

Cavity walls were designed for a purpose: to create a barrier between your home and the elements. Filling that gap with insulation may sound like a good idea, but here’s why it could cause more harm than good:

❌ Moisture Transference

Filling your cavity removes the natural barrier, allowing moisture to travel through your walls. Once the insulation becomes saturated, it’s nearly impossible to dry out due to restricted airflow, leaving your home vulnerable to damp and mold.

❌ Penetrating Damp

Cavity wall insulation often leads to penetrating damp, where external moisture seeps through walls into your property. This is especially problematic in areas exposed to heavy rain or poor weather.

❌ Hygroscopic Salts

Moisture can carry salts into your interior walls, which attract even more dampness. These salts create unsightly marks, spoil your décor, and are notoriously difficult to remedy without costly repairs.

❌ Costly Repairs

Removing failed insulation and fixing the resulting damage can cost thousands of pounds. Damp problems don’t just affect your property value—they harm your health and living conditions too.

❌ False Promises

Some insulation materials claim to allow airflow and resist moisture, but the reality often falls short. The risk remains the same.

❌ Government Endorsement Gone Wrong

Ironically, the government heavily promoted cavity wall insulation with grants and free installation schemes. Now, just like with spray foam insulation, we’re seeing the fallout. Homeowners are even struggling to secure mortgages due to the presence of certain insulation types.

🔎 Modern Homes Are Different

Homes used to be naturally ventilated with steel windows, open fireplaces, and plenty of draughts. Now, with airtight construction, moisture has nowhere to escape, leading to condensation and further complications.

💡 Our Advice? Think Twice.

At JDN Property Services, we’ve seen firsthand the costly damage poor insulation choices can cause. From penetrating damp and hygroscopic salts ruining your walls to expensive repair bills, the risks aren’t worth it. If you’re dealing with issues from cavity wall insulation or considering your options, our expert team is here to help with honest advice and effective solutions.

Don’t let insulation ruin your home. Contact JDN Property Services today for trusted property care and peace of mind.

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