How Can I Insulate My Walls Cheaply?

Insulating walls  helps retain warmth in your home during chilly winters. It’s a savvy investment for cutting energy bills and ensuring cosy living spaces.  However, many homeowners avoid it due to perceived high costs.

In this article we’ll explore how you can insulate your walls without breaking your bank.  Whether you’re on a tight budget or simply aiming to be thrifty, we’ve got you covered. 

Use Recycled or Affordable Insulation Materials

One of the biggest costs is the insulation materials themselves. You can save considerably by choosing recycled or inexpensive products readily available.

Recycled Denim/Cotton Insulation Batts

Made from recycled jeans and other natural fibres, these batts are an eco-friendly insulation option. They cost €0.50-€1.00 per square foot which is much cheaper than fibreglass batts. The loose packing makes them easy to stuff between studs.

Sheep’s Wool Insulation Batts

Made from 100% sheep’s wool sourced from Irish farms, these batts are an eco-friendly, moisture resistant and fire retardant insulation option. At €25-€35 per 8.3m pack, they cost much less than fibreglass batts.

Rigid PIR Insulation Boards

Rigid polyisocyanurate (PIR) foam boards are commonly used for insulating Irish homes. Found at any hardware store for around €0.50 per square foot, these foil-faced boards have a high insulating value.

Cellulose Loose-Fill Insulation

Made from recycled newspapers treated with boric acid, cellulose is blown or densely packed into wall cavities. It costs €0.60-€1 per square foot and can be installed DIY with a rented insulation blower machine.

Install Wall Insulation Yourself

This DIY approach saves significantly on labour costs and allows you to work at your own pace room-by-room. You can install insulation between the timber or masonry wall cavities yourself with proper tools and safety gear. Always wear your mask, gloves, and eye protection.

Tools Needed:

• Utility knife
• Straightedge or saw
• Staple gun or caulk gun
• Insulation blower machine (for cellulose)

Wall Preparation:

1. Turn off power and remove electrical covers in the work area.
2. Use a stud finder to mark locations of timber studs.
3. Cut away plasterboard sections between studs using a utility knife.

Batt Insulation Install:

1. Cut wool batts 25mm wider than stud cavities.
2. Gently friction-fit insulation between each stud space.
3. Cut around electrical boxes and reinstall covers.

Rigid Board Install:

1. Measure each stud cavity and cut rigid PIR boards to size.
2. Apply PIR insulation adhesive around board perimeters.
3. Press boards firmly into stud spaces, butting edges tightly.

Blown-In Insulation:

1. Rent an insulation blowing machine locally.
2. Cut small holes between studs to feed in the fill tube.
3. Dense pack cavities per machine manufacturer’s instructions.
4. Seal holes neatly when filled using vent caps or caulk.

Utilise Government Grants for Irish Homeowners

To make insulation even more affordable, see if you qualify for any of these government grant schemes:

• SEAI Better Energy Homes grants – Covers 30% of insulation costs
• SEAI One Stop Shop Service – Overseen insulation plus grant advice
• SEAI Free Upgrade for Homeowners – 100% free for low-income households

The table below shows grants that are available with each package.

Applying well in advance is recommended as grants are extremely popular.

Conclusion

As you can see, insulating your wall doesn’t need to be expensive. The key is to use affordable materials, doing it on your own and utilising help from the government. It can be a lot of work but the long-term benefits make the hard work and time incredibly worthwhile.

On top of the financial benefits, you can take pride knowing you’ve made your home more eco-friendly and sustainable. 

So don’t let the perceived complexity of insulating your walls deter you. Embrace this cost-saving opportunity to invest in your home’s comfort and energy efficiency. You will reap the benefits for decades to come!