Nylon vs. Polyester Carpet in Bellingham: 2026 Fiber Guide

Nylon vs. polyester carpet in Bellingham for 2026

For most Bellingham homes, nylon is the better carpet fiber anywhere people walk every day, and polyester is the better buy in rooms that see light use. Nylon carpet runs $3.85 to $5.25 per square foot installed in 2026. Polyester runs $2.75 to $3.85. That gap of roughly 30 percent buys resilience, which is a fiber's ability to spring back after it has been walked on for years or parked under a bed frame.

Nylon is a synthetic polyamide fiber, and it has been the standard residential carpet fiber for decades because it recovers from crushing better than any other synthetic. Polyester, sold as PET, is a synthetic fiber that resists water-based stains without added treatment and takes dye in deep, clear colors. It also flattens sooner in traffic lanes. Two more fibers belong in the comparison: triexta, a newer polyester relative with better bounce, and wool, the natural fiber that outlasts the synthetics at about twice the price of nylon.

The prices below match the Bellingham carpet installation cost guide, which covers pad and stair pricing line by line.

Installed price by carpet fiber

Each row covers carpet and an 8 pound rebond pad, installed over a sound, dry subfloor. The third column prices a typical upstairs of 500 square feet, which is three bedrooms plus a hall.

Flooring prices verified October 2026 against active Bellingham bids. Stairs are extra at $39 to $88 per step, and tear-out of old carpet and pad is its own line on the quote.

Cost per year of service

The cheapest carpet per square foot is rarely the cheapest per year. Take the midpoint of each range and divide by a realistic life in a busy Bellingham household.

• Polyester: $3.30 per square foot over 7 years is about $0.47 per square foot per year.
• Nylon: $4.55 over 12 years is about $0.38 per year.
• Wool blend: $7.40 over 22 years is about $0.34 per year.

On 500 square feet, that puts polyester near $235 a year and nylon near $190. The math flips in a room that barely gets used. A guest room carpet goes out of style before it wears out, so the lower upfront price wins there. Carpet as a category lasts 5 to 15 years, the shortest span in the flooring lifespan guide, and the fiber decides which end of that range a house gets.

How each carpet fiber wears

Carpet fibers fail in two ways: they stain, or they crush. Polyester is strong against the first and weak against the second. Standard nylon is the reverse. Five fibers cover nearly every residential carpet sold in Whatcom County, and each one has a room where it makes sense.

Nylon

Nylon is the fiber to put where feet land in the same spot every day. It recovers from compression, so a stair nose or a hallway centerline keeps its texture years after polyester would have matted. Its weakness is staining. Standard nylon is dyed after the yarn is made, which leaves open dye sites that juice and wine can also grab. Mills add a stain-blocking treatment to cover them, and that treatment wears down with time and harsh cleaners. Professional installers in Bellingham recommend nylon first for stairs and halls.

Solution-dyed nylon fixes the stain problem at the source. Solution-dyed fiber is fiber with the color added to the melted polymer before it is spun, so the color runs through the whole strand like a carrot instead of sitting near the surface like a radish. It resists fading at south and west windows and tolerates stronger cleaning, at $4.95 to $6.35 per square foot installed.

Polyester

Polyester gives the most softness and color for the money. The fiber absorbs almost no water, so coffee and mud sit on the surface long enough to blot. Oily soil is the exception: cooking residue and skin oils cling to polyester and dull it. The bigger limit is crush. In a hallway, polyester often shows a flattened lane within three to five years, and no cleaning brings the pile back. Builder-grade carpet is usually polyester at 25 to 30 ounces per square yard, which the builder-grade flooring guide covers in detail.

Triexta

Triexta is a polyester-family fiber made from PTT polymer, developed to close the gap between polyester's stain resistance and nylon's resilience. The Federal Trade Commission approved triexta as its own fiber name in March 2009, as a subclass within polyester, after a petition that included Mohawk and DuPont. Its stain resistance is built into the fiber and does not wash out. Resilience lands between the two older fibers: close enough to nylon for a family room, a step behind it on stairs. Local price sheets do not always break triexta out. It typically prices between polyester and mid-grade nylon, at $3.60 to $5.25 per square foot installed.

Wool and wool blends

Wool is the long-haul fiber. A wool-blend carpet runs $6.05 to $8.80 per square foot installed in Bellingham, about double nylon, and lasts about double the years. The fiber has a natural crimp that springs back, and it hides soil well. Wool has limits, though. Bleach and high-pH cleaners damage it, and some dyes and pet accidents stain it for good. All-wool broadloom starts at the top of that range and climbs from there.

Olefin loop

Olefin, also called polypropylene, is the fiber in most low-cost Berber loop carpet. It is always solution-dyed and absorbs essentially no water, which makes it the usual pick for a finished basement at $3.60 to $4.95 per square foot installed. Olefin has the lowest resilience of the group, so it is sold in tight loops that do not depend on the fiber standing back up. Keep it off stairs and away from dragged furniture, which can leave a permanent flattened track.

Carpet fiber and the wet months in Bellingham

Bellingham's climate pushes the fiber decision toward synthetics in any room near the ground. The city gets about 36 inches of rain a year, most of it from October through January, and indoor humidity follows the season. Carpet fibers respond to that moisture very differently.

Moisture uptake by fiber

Olefin and polyester take up almost no moisture, under half a percent of their weight. Nylon takes up around 4 percent. Wool is in another category: it can hold close to a third of its weight in water vapor before it feels damp, then release it as the room dries. Upstairs, that buffering is a comfort feature. Over a damp slab or a wet crawlspace, it means the carpet stays loaded with moisture for months, and the backing and pad underneath stay damp with it.

Basements and slab floors

Below grade, the safe specification is a synthetic carpet over a moisture-barrier pad, on a slab that has been tested first. The barrier pad adds $0.45 to $0.65 per square foot over standard pad. Even with that spec, expect 10 to 12 years in a basement instead of the longer life the same carpet gets upstairs. The basement flooring guide for the wet months explains the slab tests and the cases where carpet should be skipped entirely. Wool does not belong below grade in this climate at any price.

Grit at the front door

A wet season of tracked-in shoes carries fine grit into the first 10 feet of carpet past any exterior door. Grit works like sandpaper at the base of the pile, and that abrasion is where nylon earns its price. Solution-dyed fiber helps here too, because the stronger spot cleaners needed for tracked-in mud will not strip its color. A walk-off mat and a no-shoes habit add years to any fiber.

Specs that matter more than the fiber name

Two nylon carpets can differ more from each other than a good polyester differs from a cheap nylon. The label on the back of the sample and the pad under it tell the real story.

Face weight

Face weight is the weight of the pile fiber in one square yard of carpet, measured in ounces. Builder-grade polyester runs 25 to 30 ounces. A nylon that will hold up in a busy house runs 40 to 50 ounces. More weight means more fiber to wear through, though a heavy carpet with loose twist still mats.

Twist level

Twist level is the number of turns per inch in each tuft of yarn, and it decides how well a cut-pile carpet keeps its texture. A nylon at 5.5 turns per inch outlasts one at 3.5 by years, even when both carry a premium label. If a seller cannot provide the twist number, treat the carpet as builder grade.

Pad

Pad keeps the carpet backing from flexing itself apart. An 8 pound rebond pad at 7/16 inch is the working standard under residential cut pile, and stepping up from a 6 pound builder pad costs roughly $300 to $400 per 1,000 square feet. That upgrade does more for wear than moving up one carpet grade. The carpet padding guide lists density and thickness by room.

Warranty terms

Carpet warranties are written by fiber and by failure type. Stain coverage, texture retention, and abrasive wear are separate promises with separate exclusions, and stairs are often carved out. Most also require proof of periodic professional cleaning. Read the texture retention clause first, since matting is rarely covered the way buyers assume. The flooring warranty guide shows how to read those terms before signing.

Which carpet fiber fits which room

The right fiber changes room by room, and mixing fibers in one house is normal. A good carpet installation quote in Bellingham prices each room by how it gets used.

Stairs and halls

Use nylon. Stairs concentrate every footstep on the front two inches of each tread, and carpeting a staircase runs $39 to $88 per step in Bellingham, so replacing a matted flight early is expensive. Pick a dense, low pile with a firm pad. The stair flooring guide compares carpet with hardwood treads.

Bedrooms

Polyester is a sound choice in guest rooms and most bedrooms, where traffic is light and softness matters. In a primary bedroom in Edgemoor or South Hill that will keep its carpet for 20 years, a wool blend is worth pricing. Owners weighing a hard surface instead can check the carpet vs. LVP comparison for bedrooms.

Homes with pets and kids

Choose solution-dyed nylon or triexta, on a moisture-barrier pad. Both clean up after accidents without losing color, and the barrier keeps liquid out of the pad, where odor starts. Skip loop styles with cats and dogs, since claws snag them. More options are in the pet-friendly flooring guide.

Student rentals

For rentals near Western Washington University, in Sehome and the Lettered Streets, low-cost polyester is the rational pick, because carpet in those units is often replaced on a lease cycle before any fiber would wear out. The rental property flooring guide runs the numbers against LVP.

Care that protects the fiber

Regular vacuuming is the cheapest way to extend carpet life, because it removes the grit that cuts fibers at the base. Vacuum traffic areas twice a week in the wet months. According to the Carpet and Rug Institute, carpet should be professionally deep cleaned every 12 to 18 months, and many warranties ask for the receipt. Wool needs a cleaner who uses wool-safe, near-neutral products. Polyester needs a cleaning that deals with oily soil, which plain water extraction leaves behind.

Carpet fiber FAQs from Bellingham homeowners

Is nylon or polyester carpet better?

Nylon is better for stairs and halls because it springs back after years of foot traffic. Polyester is better for guest rooms and light-use bedrooms, where its lower price and built-in resistance to water-based stains matter more than resilience. In Bellingham in 2026, nylon runs $3.85 to $5.25 per square foot installed and polyester runs $2.75 to $3.85.

How much more does nylon carpet cost than polyester in Bellingham?

At a similar face weight, nylon costs about 30 percent more than polyester. For 500 square feet in 2026, polyester runs $1,375 to $1,925 installed and nylon runs $1,925 to $2,625, with pad and labor included. Counted per year of service in a busy house, nylon is usually cheaper: about $0.38 per square foot per year against $0.47 for polyester.

Is wool carpet a good choice in a damp climate like Bellingham?

Wool works well above grade in Bellingham, in living rooms and upstairs bedrooms with normal indoor humidity. It should not go in basements or on slab floors, because wool holds moisture and stays damp over a wet slab. A wool blend runs $6.05 to $8.80 per square foot installed and lasts 20 to 25 years with wool-safe cleaning.

What is triexta carpet?

Triexta is a carpet fiber in the polyester family, made from PTT polymer and recognized by the Federal Trade Commission as its own fiber name in 2009. It has permanent, built-in stain resistance and better resilience than standard polyester. In Bellingham it typically prices between polyester and nylon, at $3.60 to $5.25 per square foot installed.

Send the room list and rough square footage, and request a free estimate. The estimator brings fiber samples and writes carpet and pad as separate lines, so the comparison is on paper before any deposit. Washington registers contractors and does not issue a separate carpet license, so verify a contractor's registration and insurance on the L&I hiring a contractor page first.