Tips for Insulating your Home

Tips for Insulating your Home

Many homes are poorly insulated, resulting in cold and sometimes damp issues resulting in excessive costs running systems to combat the cold (heating) and dampness (Vent systems)

We all no heat rises. See diagram:


Warm air rises, then cools when it makes contact with cold surfaces, such as un-insulated walls, ceilings and windows.

Once cold, it sinks to the floor and gets tracked back to the heating source. Then up it goes again as hot air and on goes the convection current cycle, all within your home, making your home cold damp and drafty. Even with everything shut. Home owners feel the cold and drafts mostly on the floor. Under floor insulation will not solve cold and drafty floors. It will take the chill off the floor for feet, but it is important to realize that the priority when insulating your home from cold in winter and hot in summer, is to start from the top and work down, existing walls, and good thermal drapes, followed last with floor insulation. Difficult areas to insulate.


Some house designs have little or no ceiling cavity, such as mono pitch(flat roof), and skillian (angled ceilings), and often home owners with these type of issues, abandon the possibility of insulating them, and put money into under floor insulation. It is most important to be sure your ceiling is well insulated with good quality, thick ceiling insulation.

At Pilkington Insulation, we have our blown in glass wool, which allows us so much versatility to insulate difficult access ceilings. If there is insufficient cavity, we still have several solutions to consider. Best to call us to discuss your particular issue.


Typical attic Insulation.

For insulation to work effectively, it must be against the plaster board surface. In this case, the ceiling, and it needs to be thick, trapping lots of air. If insulation has “vented cavities” under it, or edge gaps, or exposed timber framing where you get “thermal bridging”, the effectiveness of your insulation will be poor. Preformed Batt type insulation can be challenging to fit well into ceiling spaces to work effectively.


Qmulus Glass Wool has none of the issues preformed insulation has. It is blown in, and nestles in to every nook and cranny, and only settles 2-3% of it’s depth over a 50yr period.


Wall Insulation

There is a lot of heat lost out walls. Most homes have ceiling insulation, however a high proportion of older homes build before 1992 do not. Insulating walls has a remarkable improvement on retaining warmth.


For new builds, segment insulation is most practical. For existing homes, removing the linings to insulate is a very costly and disturbing type of operation. Then there is the issue of building wrap. Most Batt type insulation must have building paper retrofitted.


Our COSY WALL Insulation is the most efficient, effective and quick solution to insulate existing walls. Small holes are drilled from either the inside or the outside cladding (home owner’s choice). Once filled to a medium density, the holes are re filled with the appropriate system for that particular material.


Building wrap is not required for Cosy Wall Insulation, as this is a product developed specifically for walls without wrap, ie: does not absorb moisture. Retro fitting insulation into existing walls must comply with all relevant building code clauses, and normally a building consent is required. Pilkington Insulation Ltd process the consent application, right through to Code of Compliance.

Under Floor Insulation

Here again, the insulation needs to be fitted hard against the flooring to get the best performance from the insulation. We use our WARMAFLOOR Insulation, which is an over width blanket role, which is stapled into the top edge of the floor joists, every 300mm. This polyester blanket and fastening system works very well, and stands the test of time.

Pilkington Insulation
Proudly serving the Auckland and Northland regions
Phone : 0508 92 76 87
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