Go back
Home Logic Article

Lath and Plaster Walls Insulation

Lath and Plaster Walls Insulation

Lots of older properties have lath and plaster external walls, which can easily become damp, and let cold air into the home.

Exterior walls of this type aren’t ideal, and aren’t often installed anymore, but there are ways to ensure homes like this don’t become too cold or attract damp and mould – and that is to install specialist lath and plaster walls insulation.

Insulation on the exterior of a house works differently than that internal equivalents. Applied by industrial equipment as a chemical spray, exterior wall insulation is sprayed directly onto the wall – be it brick, plaster, lath, concrete or stone.

The spray is invisible, and forms a thermal barrier against the wall; preventing moisture from passing through.

The pores in porous materials normally hold air within them, but in countries like the UK, where there’s lots of rainy weather, these pores are often filled with water instead, which conducts through cooler temperatures, and can accumulate dust, dirt, allergens, algae and mould.

External Wall Insulation Offers Additional Protection

Exterior wall insulation spray reduces the thermal conductivity of a wall by over 95%, acting instead as a terrific thermal barrier.

You should still look to have insulation installed in your internal wall, floor and ceiling cavities, but having an external protection as well as internal ensures that your existing insulation can work to its full potential.

The difference in temperature will be noticeable almost immediately, and will continue to drive down your bills.

Lath and Plaster Walls Insulation

A Solution for Every Set Up

Exterior wall insulation can be applied to existing walls, regardless of how long they’ve been up, and no matter how dirty they are.

In preparation for application, your exterior wall insulation technician will start by cleaning the walls. All surfaces will be thoroughly pressure washed, treated for algae (if required), rendering repaired, cracks filled and non-spray areas masked for protection.

A primer spray will then be added, and finally the exterior wall insulation sprayed. This makes sure that your walls are bare to begin with and benefit as much as possible from the new insulation.

Masonry, lath and plaster is naturally somewhat breathable and lets through a degree of air and water vapour. Exterior wall insulation still allows this to happen, but blocks water and heavy moisture from passing through, so damp and mould cannot form.

When you consider that just 5% damp content can lower thermal resistance of a wall by 50%, the consequences are decidedly dire.

Once applied, as explained, water can no longer enter the pores of the wall material (be that brick, stone, lath, plaster or concrete).

Maximum Benefits for Minimal Hassle

Dirt, dust, oil and algae will all stream off the wall along with rain, effectively making your walls wipe-clean.

This results in a low maintenance exterior for your home that continually looks neat and clean. Exterior wall insulation is even effective on properties in sea-salt penetrated air and those that are primarily in shade.

Exterior wall insulation lasts for at least 20 years, providing a long-term solution to inclement weather. When applied by an expert technician, you may even find it lasts longer.

Home Logic are the UK’s leading provider of exterior lath and plaster walls insulation. Contact them today for a free, completely no-obligation discussion, home survey and quote; entirely bespoke to you and your home.