Yes, rigid insulation almost always needs to be covered, though the type of covering depends on where it is installed.
No, PIR insulation should not be left uncovered for extended periods. Why? Fire Safety: While PIR insulation has good fire resistance, it is still flammable and can emit toxic fumes when exposed to high heat or fire. Without a protective barrier (e.g., drywall or cladding), there is a risk of fire spread.
Yes. Building codes generally require rigid foam insulation to be covered. Because foam plastic is flammable and can produce toxic smoke if burned, it must be protected by a fire-rated thermal or ignition barrier (such as ½-inch drywall) on interior spaces, and shielded from moisture, UV rays, and pests on exteriors.
In summary, whether you're using insulation boards or foil insulation, it's important to leave an air gap to improve the effectiveness of the insulation and prevent moisture buildup.
Unfaced insulation is great for new construction, remodels, walls, floors, ceilings, basements, attics and crawlspaces. It's best used for interior wall applications that do not face the outside and also in rooms that don't need moisture control, like living rooms, dining rooms and studies.
Yes, homeowners can add new insulation over existing insulation in most cases. This approach works well for attics, walls, and floors where the current layer remains intact and undisturbed. Building codes and energy experts often support this method to boost thermal performance without full removal.
Foam insulation is a common target because it's easy for them to chew through. The material offers little resistance, allowing mice to create tunnels or nests within the insulation. But mice aren't just interested in chewing for the sake of it—they're also drawn to the warmth and shelter insulation provides.
Expanded polystyrene foam boards are made with air bubbles that stop heat transfer. Unfortunately, those same air bubbles collect moisture which leads to mold and mildew growth. Solution: Rigid foam board insulation products are actually made to be water resistant.
What time of year is Insulation cheapest?
In general, if the foam rigid insulation is installed correctly and sealed properly, a vapour barrier may not be necessary. However, there are certain situations where a vapour barrier is recommended, such as in areas with high humidity levels or where there is a risk of moisture infiltration.
Because spray foam can trap moisture, hide the condition of the roof, make it difficult for surveyors to inspect, which means risks like timber decay, dry rot, and not forgetting increased fire risk. If you've got it or you're buying a property that does, this is something you need to know upfront.
While you can physically touch fiberglass insulation with bare hands, you should never do it intentionally. Fiberglass is made of spun glass fibers that break off easily. Touching them causes microscopic glass shards to embed themselves in your skin, leading to severe, irritating itching, and sometimes a rash.
While there are no UV rays to destroy the foam board's insulative properties, interior exposure can create a fire hazard. Therefore, to qualify a building for an occupancy permit, most jurisdictions in North America demand that a thermal barrier, like drywall, cover the foam board.
Mice are curious and always searching for safe, snug, and warm nesting sites. Attics filled with blown-in insulation provide an excellent option–from the mice's point of view. As long as there is a ready food source. Mice are omnivorous and will eat and chew on almost anything including wood and electrical wires.
Common Problems with Rigid Board Insulation in Basements
❌ Gaps & Air Pockets – Prevents proper insulation coverage. ❌ Moisture Penetration – Can lead to mold, mildew, and decay. ❌ Condensation Issues – Moisture can wick up from the foundation, causing damage over time.
Home insulation doesn't have an “expiration date,” and the material doesn't “go bad” after a certain number of years have passed. Ultimately, the condition of the insulation and its performance are more important factors than age when deciding whether to upgrade or replace insulation.
The largest source of heat loss in a typical house is uncontrolled air leakage (drafts), accounting for up to 38% of lost heat. Warm air escapes through hidden cracks and gaps, while the following structural areas are the primary culprits for escaping warmth:
Potential problems with spray foam insulation
reduce air circulation and ventilation within a roof space. lead to dampness and condensation on the underside of a roof because it forms an air barrier and stops moisture from escaping. place timber-framed roofs at risk of decay.
Mold is generally at its worst from early spring through early fall (specifically July through October), peaking during the warmest and most humid months. Mold thrives in warm temperatures (60∘F to 80∘F) combined with relative humidity levels above 60%.
Direct contact with fiberglass or breathing airborne dust containing fiberglass may irritate the skin, eyes, nose, and throat. The symptoms of irritation are often nonspecific, temporary, and may include itching, coughing, or wheezing.
Hello Ernest, while it is not intended for use on foam board insulation, it could be used for that application. The Tyvek® Tape is intended for use with the Tyvek® WRB products.
To do this you install 1x2 furring strips on the masonry, 3/4" foam between, then drywall attaches to the furring strips. Make sure to use proper screws/nails on the furring strips and also some polyurethane glue on the strips as well. Use the rigid foam with channels for furring strips.
Loctite PL 300 Foamboard 10 oz.