What type of underpad should I use for carpet in my NB home?

Choose a high-density foam or rubber underpad rated 6–8 lb density in 7/16" thickness for most rooms in your New Brunswick home — this delivers the best balance of comfort, carpet longevity, and thermal insulation for our climate. The underpad is the hidden foundation of every carpet installation, and in NB's long heating season, it's the layer that determines how warm your carpet feels underfoot on cold winter mornings.

Underpad Types and Where to Use Them

Rebond (bonded urethane) foam is the most common residential underpad and works well for bedrooms, living rooms, and hallways on upper floors. Look for 6–8 lb density — this is the weight per cubic foot of the foam and directly indicates its durability and support. Budget rebond at 4–5 lb density feels soft initially but compresses permanently within a year, leaving your carpet unsupported and prone to premature wear. Quality rebond at 6–8 lb density costs $0.75–$1.50 per square foot in New Brunswick and maintains its resilience for the carpet's full lifespan.

Closed-cell foam underpad is essential for any carpet installation over concrete in NB — basements, slab-on-grade entryways, and ground-floor rooms without a crawl space. Unlike rebond foam, closed-cell foam does not absorb moisture, which is critical in New Brunswick where concrete slabs continuously release moisture vapour from the Maritime water table. Closed-cell foam pads cost $1.00–$2.00 per square foot and provide both moisture resistance and thermal insulation.

Rubber underpad (flat slab or waffle rubber) is the premium choice for high-traffic areas like stairs, hallways, and family rooms. Rubber is the most durable underpad material — it resists compression better than foam over years of heavy foot traffic. It also provides superior sound dampening, which matters in multi-level NB homes where noise transmission between floors is a concern. Rubber underpad runs $1.50–$3.00 per square foot and is worth the premium in areas that see daily heavy use.

Fibre (felt) underpad made from recycled textile fibres offers excellent thermal insulation and sound absorption. It's denser and firmer than foam, providing a more stable feel underfoot. Some NB homeowners prefer fibre pad for its warmth during heating season. It costs $1.00–$2.00 per square foot and works well on upper floors but should not be used over concrete without a separate moisture barrier.

Thickness matters, but more isn't always better. For most residential carpet, 7/16" (11mm) is the sweet spot. Going thicker — 1/2" or more — can feel luxuriously soft but actually shortens carpet life by allowing too much flex in the carpet backing, which stresses seams and accelerates fibre wear. For Berber and low-profile loop carpet, use a thinner, firmer pad (3/8" at 8+ lb density) to prevent the carpet from stretching and buckling.

For NB basements specifically, pair closed-cell foam underpad with a polyethylene vapour barrier beneath it, or use a combination pad that integrates both the vapour barrier and cushion in one product. This dual-layer approach blocks moisture migration from the concrete while providing comfort and insulation — essential for making an NB basement feel like livable space rather than a cold concrete box.

Budget roughly $1–$2 per square foot for quality underpad in your carpet installation estimate. For a typical NB home with 800 square feet of carpet across bedrooms and living areas, that's $800–$1,600 for underpad — an investment that directly extends carpet life by 3–5 years and makes every step more comfortable during our six-month heating season.

---

Looking for experienced contractors? The New Brunswick Construction Network connects homeowners with qualified professionals:

• First united design & construction inc.
• 3Tone Construction Ltd
• Arctic Fox Construction Inc.
• Modern Epoxy Inc
• FRS Flooring Solutions