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Insulation Price Increases 2026
72 insulation price increases from 53 manufacturers take effect in 2026, plus 4 surcharges; the next is PowerWool at 6% on Oct 31, 2026. The median stated increase is 6.5%. Checked daily · last checked Oct 26, 2026.
72 insulation price increases from 53 manufacturers take effect in 2026, plus 4 surcharges. Grouped below by effective date, each with a link to the original letter. 2 of them are still ahead.
72price increases in 2026
53brands
6.5%typical stated increase
2still to take effect in 2026
4surcharges in 2026
- Next effective: PowerWool (Oct 31, 2026, 6%); Owens Corning Insulation (Nov 16, 2026, 5%)
- Latest effective: DuPont (Oct 26, 2026, 6%); Gerard Daniel Worldwide (Oct 19, 2026); H.B. Fuller (Oct 12, 2026, 1.5%)
- Typical %: median 6.5% across the 55 letters effective in 2026 that state a percentage (middle half 6%–10%; ranges counted at their midpoint).
- Busiest months in 2026: May 2026 (17), April 2026 (15), July 2026 (12)
Method: The sample contains 76 notices effective in 2026: 72 price increases and 4 surcharges; 72 count as price increases and 55 include a usable stated percentage. Percentage statistics exclude separate surcharges, decreases, rescinded notices and increases without a stated percentage. A range such as 3–5% counts once at its midpoint; “up to” and “average” use the stated figure. Each notice has equal weight. These statistics describe collected announcements, not a typical contractor’s actual invoice; pricing can vary by product, region, supplier and account terms.
When insulation increases take effect in 2026
| Effective month | Increases | State a % | Median stated % |
|---|---|---|---|
| January 2026 | 4 | 4 | – |
| March 2026 | 1 | 0 | – |
| April 2026 | 15 | 12 | 10 |
| May 2026 | 17 | 12 | 6 |
| June 2026 | 11 | 9 | 8 |
| July 2026 | 12 | 8 | 6.5 |
| August 2026 | 5 | 4 | – |
| September 2026 | 2 | 2 | – |
| October 2026 | 4 | 3 | – |
| November 2026 | 1 | 1 | – |
Frequently asked questions
When do insulation price increases usually take effect?
Of the 72 insulation price increases effective in 2026 that PriceLetter has on file, the busiest effective months are May (17), April (15), July (12). 29% take effect on the 1st of a month.
How much are insulation prices going up in 2026?
55 of the 72 price increases state a percentage. The median stated increase is 6.5%, and the middle half of letters fall between 6% and 10% (a stated range like "3–5%" counts at its midpoint). Many letters say "up to" a figure, so actual increases vary by product line.
Are more insulation price increases coming?
2 insulation price increases are still to take effect in 2026: PowerWool on Oct 31, 2026 (6%), Owens Corning Insulation on Nov 16, 2026 (5%).
Where does this data come from?
From manufacturer price-increase letters posted publicly by insulation distributors and the trade press, checked daily. Each row links to the original letter or posting. Always confirm pricing with your supplier.
All 2026 insulation price increases by effective date
January 2026 (4)
| Effective | Brand | Products | Increase | Source |
|---|---|---|---|---|
| Jan 1, 2026 | Mountain Fiber | Mountain Fiber | 7% | Original letter · Performance Pro Supply |
| Jan 1, 2026 | PTF Insulation Fabricators | * REVISED * PTF INSULATION FABRICATORS 5%-18% PRICE INCREASES EFFECTIVE JANUARY 1 & JANUARY 12, 2026 | 5%-18% | Original letter · General Insulation Company |
| Jan 5, 2026 | TPS Thermal Pipe Shields | Insulation products TPS THERMAL PIPE SHIELDS 6%-10% PRICE INCREASES EFFECTIVE JANUARY 5, 2026 |
6%-10% | Original letter · General Insulation Company |
| Jan 9, 2026 | Knauf | Insulation | 6% | Original letter · ABC Supply Interiors |
March 2026 (1)
| Effective | Brand | Products | Increase | Source |
|---|---|---|---|---|
| Mar 31, 2026 | Owens Corning – Foamular | Insulation | see letter | Original letter · ABC Supply Interiors |
April 2026 (16)
| Effective | Brand | Products | Increase | Source |
|---|---|---|---|---|
| Apr 1, 2026 | Aluf Plastics | plastic products ALUF PLASTICS 10% PRICE INCREASE EFFECTIVE APRIL 1, 2026 |
10% | Original letter · General Insulation Company |
| Apr 2, 2026 | 3M | 3M 6% GLOBAL FUEL AND ENERGY PRICE INCREASE OR SUPPLEMENTAL CHARGE EFFECTIVE APRIL 2, 2026 | 6% | Original letter · General Insulation Company |
| Apr 10, 2026 | PTF Insulation Fabricators | Titebond Mineral wool PTF INSULATION FABRICATORS 8% PRICE INCREASE – EFFECTIVE APRIL 10, 2026 |
8% | Original letter · General Insulation Company |
| Apr 13, 2026 | Hunter | Polyiso insulation Hunter will implement a price increase of 5%-7%, effective April 13, 2026, on Polyiso insulation products ... |
5%-7% | Original letter · Convoy Supply (US) |
| Apr 13, 2026 | Johns Manville | JOHNS MANVILLE 8%-12% PRICE INCREASES EFFECTIVE APRIL 13, 2026 | 8%-12% | Original letter · General Insulation Company |
| Apr 15, 2026 | Elastochem | Elastochem Spray Polyurethane Foam Products | 8-12% | Original letter · Performance Pro Supply |
| Apr 15, 2026 | Everest | Everest Systems Spray Polyurethane Foam Systems | 15% | Original letter · Performance Pro Supply |
| Apr 15, 2026 | HBS | HBS Spray Foam Insulation | $0.14 per lb. | Original letter · Performance Pro Supply |
| Apr 15, 2026 | Natural Polymers | Natural Polymers Spray Foam Products | 10% | Original letter · Performance Pro Supply |
| Apr 15, 2026 | Quadrant EnviroSeal | Quadrant EnviroSeal | $0.18 per lb. | Original letter · Performance Pro Supply |
| Apr 15, 2026 | UPC | UPC Polyurethane Products | 12% per lb. | Original letter · Performance Pro Supply |
| Apr 17, 2026 | Enverge | Enverge Spray Foam Products | $0.14 per lb. | Original letter · Performance Pro Supply |
| Apr 20, 2026 | Carlisle | Carlisle Spray Foam Insulation Products | 10% | Original letter · Performance Pro Supply |
| Apr 20, 2026 | Cleanfiber | insulation products CLEANFIBER 5% PRICE INCREASE ON ALL PRODUCTS, EFFECTIVE APRIL 20, 2026 |
5% | Original letter · General Insulation Company |
| Apr 20, 2026 | Soudal | SOUDAL IMPLEMENTS TEMPORARY SURCHARGE – EFFECTIVE APRIL 20, 2026 | Surcharge see letter | Original letter · General Insulation Company |
| Apr 27, 2026 | Revolution Mesquite | Polyethylene products REVOLUTION MESQUITE 20% PRICE INCREASE – EFFECTIVE APRIL 27, 2026 |
20% | Original letter · General Insulation Company |
May 2026 (17)
| Effective | Brand | Products | Increase | Source |
|---|---|---|---|---|
| May 1, 2026 | Enverge | Spray Foam ENVERGE PRICE INCREASE EFFECTIVE MAY 1, 2026 |
$0.25 per pound | Original letter · General Insulation Company |
| May 1, 2026 | International Fireproof Technology | INTERNATIONAL FIREPROOF TECHNOLOGY, INC. (IFTI) PRICE INCREASE – EFFECTIVE MAY 1, 2026 | see letter | Original letter · General Insulation Company |
| May 1, 2026 | Johns Manville | Insulation | 6% | Original letter · ABC Supply Interiors Original letter · Performance Pro Supply |
| May 1, 2026 | Lamtec | Metal Building Products LAMTEC 1% – 3.5% PRICE INCREASES EFFECTIVE MAY 1, 2026 |
1% – 3.5% | Original letter · General Insulation Company |
| May 1, 2026 | Reflectix / rFOIL | FOB factory products rFOIL / REFLECTIX PRICE INCREASES EFFECTIVE MAY 1, 2026 |
see letter | Original letter · General Insulation Company |
| May 1, 2026 | Sika | Insulation | 6% | Original letter · ABC Supply Interiors |
| May 1, 2026 | Soudal | SOUDAL 3% PRICE INCREASE ACROSS ALL PRODUCTS – EFFECTIVE MAY 1, 2026 | 3% | Original letter · General Insulation Company |
| May 6, 2026 | DuPont | Thermax and tuff-r brand insulation DUPONT 6% PRICE INCREASE FOR THERMAX AND TUFF-R BRAND INSULATION – EFFECTIVE MAY 6, 2026 |
6% | Original letter · General Insulation Company |
| May 11, 2026 | Kingspan | Insulation | see letter | Original letter · ABC Supply Interiors |
| May 15, 2026 | Johns Manville | Johns Manville Corbond® Spray Foam | 15% | Original letter · Performance Pro Supply |
| May 15, 2026 | NCFI | NCFI Spray Foam Systems | 12% | Original letter · Performance Pro Supply |
| May 18, 2026 | No-Burn | NO-BURN PRICE INCREASE COMING SOON: EFFECTIVE MAY 18, 2026 | see letter | Original letter · General Insulation Company |
| May 22, 2026 | Johns Manville | Insulation | 5%-10% | Original letter · ABC Supply Interiors |
| May 25, 2026 | Dorken Systems | Delta branded products DORKEN SYSTEMS 7% PRICE INCREASE ON ALL DELTA BRANDED PRODUCTS – EFFECTIVE MAY 25, 2026 |
7% | Original letter · General Insulation Company |
| May 25, 2026 | Kingspan | Insulation | 4%-8% | Original letter · ABC Supply Interiors Original letter · Performance Pro Supply |
| May 28, 2026 | DuPont | Insulation | 4% | Original letter · ABC Supply Interiors Original letter · General Insulation Company |
| May 31, 2026 | Victory Bear | VICTORY BEAR 4% PRICE INCREASE – EFFECTIVE MAY 31, 2026 | 4% | Original letter · General Insulation Company |
June 2026 (12)
| Effective | Brand | Products | Increase | Source |
|---|---|---|---|---|
| Jun 5, 2026 | Johns Manville | Insulation | 10% | Original letter · ABC Supply Interiors Original letter · Performance Pro Supply |
| Jun 8, 2026 | JPL | all products JPL 8% PRICE INCREASE – EFFECTIVE JUNE 8, 2026 |
8% | Original letter · General Insulation Company |
| Jun 15, 2026 | ATCO | ATCO 8% PRICE INCREASE – EFFECTIVE JUNE 15, 2026 | 8% | Original letter · General Insulation Company |
| Jun 15, 2026 | DuPont | Insulation | see letter | Original letter · ABC Supply Interiors |
| Jun 15, 2026 | Insulfoam | EPS products Carlisle will implement an Energy Surcharge of 7% on EPS products effective June 15, 2026 ... |
Surcharge 7% | Original letter · Convoy Supply (US) |
| Jun 15, 2026 | PTF Insulation Fabricators | Aluminum products PTF INSULATION FABRICATORS 10%-15% PRICE INCREASE FOR ALUMINUM PRODUCTS, EFFECTIVE JUNE 15, 2026 |
10%-15% | Original letter · General Insulation Company |
| Jun 15, 2026 | RPR Products | RPR PRODUCTS 10%-15% PRICE INCREASES, EFFECTIVE JUNE 15, 2026 | 10%-15% | Original letter · General Insulation Company |
| Jun 15, 2026 | Tytan/Selena | TYTAN/SELENA PRICE INCREASE, EFFECTIVE JUNE 15, 2026 | see letter | Original letter · General Insulation Company |
| Jun 26, 2026 | Knauf | Insulation | 6% / 8% | Original letter · ABC Supply Interiors Conklin Metal Industries Universal Supply |
| Jun 26, 2026 | Manson | Commercial MANSON 6% – 8% PRICE INCREASES ON COMMERCIAL, INDUSTRIAL, AND AIR HANDLING PRODUCTS EFFECTIVE JUNE 26, 2026 |
6% – 8% | Original letter · General Insulation Company |
| Jun 27, 2026 | DuPont | Insulation | 5% | Original letter · ABC Supply Interiors |
| Jun 29, 2026 | Johns Manville | Insulation | 6% | Original letter · ABC Supply Interiors Original letter · Performance Pro Supply |
July 2026 (12)
| Effective | Brand | Products | Increase | Source |
|---|---|---|---|---|
| Jul 1, 2026 | Atlas / Hunter / SOPREMA | Polyiso Insulation products Atlas, Hunter, and SOPREMA will implement a price increase of 5%-8%, effective July 1st, 2026, on all Polyiso Insulation products... |
5%-8% | Original letter · Convoy Supply (US) |
| Jul 1, 2026 | CertainTeed | CertainTeed Fiberglass Insulation Products | 6% | Original letter · Performance Pro Supply |
| Jul 1, 2026 | CertainTeed Insulation | Insulation products | see letter | Original letter · Negwer Materials |
| Jul 1, 2026 | Intec | Intec FORCE@ and VORTEC@ Machines | see letter | Original letter · Performance Pro Supply |
| Jul 1, 2026 | Midwest Fasteners | MIDWEST FASTERNERS, INC. 6.5% PRICE INCREASE – EFFECTIVE JULY 1, 2026 | 6.5% | Original letter · General Insulation Company |
| Jul 1, 2026 | Owens Corning – Thermafiber | Insulation | see letter | Original letter · ABC Supply Interiors |
| Jul 1, 2026 | Rockwool | Insulation | 8% | Original letter · ABC Supply Interiors Conklin Metal Industries Original letter · Performance Pro Supply Original letter · General Insulation Company |
| Jul 2, 2026 | PTF Insulation Fabricators | Fiberglass products PTF INSULATION FABRICATORS 8% PRICE INCREASE FOR FIBERGLASS PRODUCTS – EFFECTIVE JULY 2, 2026 |
8% | Original letter · General Insulation Company |
| Jul 6, 2026 | PolyCon | PolyCon Polyurethane Foam Products | $.29 | Original letter · Performance Pro Supply |
| Jul 6, 2026 | Thermaflex | All Thermaflex Products THERMAFLEX 8% PRICE INCREASE FOR ALL PRODUCTS – EFFECTIVE JULY 6, 2026 |
8% | Original letter · General Insulation Company |
| Jul 13, 2026 | Proto | all products PROTO CORP 6% PRICE INCREASE FOR ALL PRODUCTS – EFFECTIVE JULY 13, 2026 |
6% | Original letter · General Insulation Company |
| Jul 20, 2026 | PTF Insulation Fabricators | Styrofoam products PTF INSULATION FABRICATORS 5% PRICE INCREASE ON ALL STYROFOAM PRODUCTS – EFFECTIVE JULY 20, 2026 |
5% | Original letter · General Insulation Company |
August 2026 (5)
| Effective | Brand | Products | Increase | Source |
|---|---|---|---|---|
| Aug 1, 2026 | Carlisle, Hunter, & Versico | Polyiso Insulation Products Carlisle, Hunter, and Versico will implement a price increase of 5%-8%, effective August 1, 2026, on all Polyiso Insulation and Low Foam products ... |
5%-8% | Original letter · Convoy Supply (US) |
| Aug 1, 2026 | Hunter XCI | Insulation | see letter | Original letter · ABC Supply Interiors |
| Aug 1, 2026 | STI | STI Products | 10% | Original letter · Performance Pro Supply |
| Aug 3, 2026 | OX Engineered Products | Insulation | 5%, 6%, 8% | Original letter · ABC Supply Interiors |
| Aug 10, 2026 | Sika | Insulation | 3-6% | Original letter · ABC Supply Interiors |
September 2026 (2)
| Effective | Brand | Products | Increase | Source |
|---|---|---|---|---|
| Sep 1, 2026 | Knauf | Insulation | 6% | Original letter · ABC Supply Interiors Original letter · General Insulation Company |
| Sep 30, 2026 | Johns Manville | Polyiso Foam Sheathing | 8% | Original letter · Performance Pro Supply |
October 2026 (6)
| Effective | Brand | Products | Increase | Source |
|---|---|---|---|---|
| Oct 1, 2026 | Hunter XCI | Insulation | Surcharge $1,250 per shipment | Original letter · ABC Supply Interiors |
| Oct 12, 2026 | H.B. Fuller | all products H.B. FULLER 1.5% PRICE INCREASE ON ALL PRODUCTS EFFECTIVE OCTOBER 12, 2026 |
1.5% | Original letter · General Insulation Company |
| Oct 19, 2026 | Gerard Daniel Worldwide | entire catalog GERARD DANIEL WORLDWIDE PRICE INCREASES EFFECTIVE OCTOBER 19, 2026 |
see letter | Original letter · General Insulation Company |
| Oct 22, 2026 | DuPont | Styrofoam brand insulation (US) | Surcharge $720 | Original letter · ABC Supply Interiors |
| Oct 26, 2026 next 30 days |
DuPont | Thermax and Tuff-R polyiso insulation | 6% | Original letter · ABC Supply Interiors |
| Oct 31, 2026 next 30 days |
PowerWool | Insulation | 6% | Original letter · ABC Supply Interiors |
November 2026 (1)
| Effective | Brand | Products | Increase | Source |
|---|---|---|---|---|
| Nov 16, 2026 next 30 days |
Owens Corning Insulation | FOAMULAR NGX extruded polystyrene foam board 5% price increase on FOAMULAR NGX extruded polystyrene foam board products, effective November 16, 2026. |
5% | Original letter · Negwer Materials |