Is it Worth Insulating Internal Walls?

Internal and external solid wall insulation both come with a fair share of cost and upheaval. This page is dedicated solely to internal solid wall insulation, however, you can find more information on external wall insulation on our external solid wall insulation page. Internal wall insulation, whilst effective, can pose a number of issues. Granted, it is less expensive than external solid wall insulation - up to 50% less in fact - but it is less efficient, potentially more difficult and time-consuming, especially if the property is inhabited while the work proceeds. Installing internal wall insulation can indeed cause disruption, as it may require switches, radiators, and kitchen units to be removed and replaced. What's more, it requires a lot of attention to detail as creating an airtight layer is essential; awkward areas such as reveals and floor voids will need extra attention in order to seal them properly. Consequently, you must ensure that internal wall insulation is the best possible solution for a property before moving forward with your project. While internal wall insulation may have its difficulties, it is a more productive solution than doing nothing at all and has a higher return than external wall insulation - making it worth exploring in spite of the challenges.

What Type of Walls Can Internal Insulation Be Fitted To?

Internal insulation is specifically designed to be installed on solid walls, such as cavity brick or block walls (man-made masonry). Unlike cavity walls, solid walls feature no gap, so they can't be filled with cavity wall insulation. You can also apply internal insulation to the internal surface of natural stone walls. A timber frame isn't out of the question either.

Can Solid Wall Insulation Cause Damp?

If the internal walls of your home are plagued by dampness, you will need to take care of this before adding insulation. If not taken care of, insulation can cause further damage to both the wall and your insulation by trapping moisture. To avoid any future issues with dampness, use damp proof materials to line your wall before repainting it and installing new insulation. If installed properly, solid wall insulation will not cause or exacerbate damp problems. Prior to beginning any work, installers will do a thorough inspection of your property to confirm that it is in good condition overall and that the walls, floor, and ceiling are dry. This would entail attending to current dampness issues as well as problems such as cracked bricks, missing mortar between joints, or waterlogged gutters which could pose difficulties down the road.

Internal Wall Insulation | Materials Market

50mm Kingspan Kooltherm K112 Framing Insulation Board 2400mm x 1200mm (6/Pack)

Internal Wall Insulation

50mm Kingspan Kooltherm K112 Framing Insulation Board 2400mm x 1200mm (6/Pack)

50mm Rockwool RW5 Acoustic Sound Insulation Slab (2.88m2/Pack)

70mm Rockwool Flexi Acoustic Sound Insulation Slab (5.76m2/Pack)

30mm Rockwool RWA45 Acoustic Sound Insulation Slab (8.64m2/Pack)

60mm Rockwool RW3 Acoustic Sound Insulation Slab (4.32m2/Pack)

42.5mm Kingspan Kooltherm K118 Insulated Plasterboard 2400mm x 1200mm (18/Pack)

57.5mm Kingspan Kooltherm K118 Insulated Plasterboard 2400mm x 1200mm (14/Pack)

70mm Kingspan Kooltherm K112 Framing Insulation Board 2400mm x 1200mm (4/Pack)

90mm Rockwool Flexi Acoustic Sound Insulation Slab (4.32m2/Pack)

60mm Rockwool Flexi Acoustic Sound Insulation Slab (8.64m2/Pack)

60mm Kingspan Kooltherm K112 Framing Insulation Board 2400mm x 1200mm (5/Pack)

50mm Knauf Acoustic (APR) Insulation Roll - Pallet of 24 Rolls (388.8m2/Pallet)

75mm Isover RD Party Wall Insulation Roll (7.74m2/Roll)

75mm Knauf Acoustic (APR) Insulation Roll - Pallet of 24 Rolls (417.6m2/Pallet)

80mm Kingspan Kooltherm K112 Framing Insulation Board 2400mm x 1200mm (4/Pack)

100mm Isover RD Party Wall Insulation Roll (5.46m2/Roll)

40mm Rockwool RW3 Acoustic Sound Insulation Slab (7.2m2/Pack)

30mm Rockwool RW3 Acoustic Sound Insulation Slab (10.8m2/Pack)

Manufacturer

Material type

Fire rating

Width

Thickness

Thermal conductivity

Edge

Density

Compressive strength

Related Articles

How to Install XPS Insulation

How to Insulate Under Floorboards Without Removing

How to Insulate a Cold Wall from the Inside

How To Cut Insulation Rolls

How To Cut Plasterboard: A Step-by-Step Guide

How To Fix Plasterboard

How To Install Celotex Insulation Boards

How and Where Is Rockwool Manufactured?

What Is Dot and Dab?

Celotex Floor Insulation Guide

How To Soundproof A Floor

All Categories

Insulation Boards

Insulation Slabs

Insulation Rolls

Material Type

Applications

Insulation Accessories

Plasterboard

Insulated Plasterboard

Metal Studs & Ceilings

Bagged Products

Other Boards

Drylining Accessories

Treated Timber

Sheet Materials

CLS Timber

Planed Timber

Loft Boards

Cladding

Sand & Aggregates

Cements & Limes

Bricks & Blocks

Lintels

Builders Metalwork

Drainage

Site Supplies

Internal Doors

External Doors

Skirting & Architrave

Windows

Door Frames

Fencing

Decking

Landscaping

Driveways & Paving

Lead Flashing

Pitched Roofing

Flat Roofing

Fascias & Soffits

Guttering