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[Updated April 30, 2026] Status of Order Suspension for Building Materials and Supplies Due to Middle Eastern Situation | Roof Materials and Paints That Will Increase in Price Starting May 2026

 

[Updated April 30, 2026] About Price Increases and Supply Conditions of Building Materials

Currently, in the exterior renovation industry, there are issues not only with price increases of building materials but also with shipping restrictions and shipping suspensions.
There is a wide-ranging impact on paints and building materials used in exterior renovations, and delays in construction due to difficulties in obtaining materials and significant price increases of building materials are expected.

■ Why are building materials skyrocketing in price?

The current surge in building material prices is due to a combination of several factors.

  • Escalating tensions in the Middle East
  • Rising prices of crude oil and naphtha
  • Increased transportation costs
  • Labor shortages and logistics issues

In particular, paints and insulation materials contain many petroleum-derived raw materials, which are directly affected by crude oil prices, leading to rapid price increases.

■ List of Price Increases and Supply Conditions by Building Material (Related to Exterior Renovation)

外壁塗装の下塗りに影響 屋根関連 屋根材 約10〜20％ 一部出荷制限 屋根工事の遅延 防水シート 約15〜25％ 入荷不可 防水工事の遅延 屋根カバー工法 約10〜20％ 入手困難 工事の進行に影響

Undercoating work for exterior walls and interior painting is not possible Water-based topcoat Approximately 15-25% Partial shipping restrictions Delays in exterior wall and interior painting Painting protective materials Approximately 15-25% Difficult to obtain Poly mask and protective tape.
Protection is not possible, affecting painting work Sealing materials Approximately 10-20% Not available for restocking Sealing work around joints and windows of exterior walls is not possible, affecting exterior wall painting Urethane waterproofing material
Topcoat Approximately 40-50% Not available for restocking Waterproofing work on rooftops and balconies is not possible Roofing and exterior wall materials Roofing materials (shingle materials) Approximately 30-40% Partial shipping restrictions Possibility of extended construction period Roofing materials (metal) Undecided Available Possible price increase in the near future
Roofing materials with insulation may face shipping restrictions or halts Roofing Approximately 30-50% Difficult to obtain Delays in roofing work; roofing overlay and re-roofing work not possible Vapor-permeable waterproof sheet Approximately 15-25% Available Currently available. Future shipping restrictions may apply Resin substrate materials Approximately 20-30% Difficult to obtain Roofing overlay and re-roofing work cannot be performed. Since it is also used as a substrate for metal siding work, exterior wall covering work will also be difficult. Insulation materials Approximately 30-50% Difficult to Obtain Construction Delays Metal Siding Undecided Available Possible price increase in the near future
Due to insulation materials, there may be shipping restrictions or halts Ceramic Siding Undecided Available Currently available for delivery Wood Base (e.g., Planks) Undecided Available Currently available for delivery Structural Plywood Approximately 5-10% Shipping Restrictions Delays in roof replacement work Polycarbonate Wave Panels Approximately 20-30% Available Currently available Lumber-related materials Approximately 20-30% Some shipping restrictions Mainly affects interior finishing work Rain gutter-related Approximately 20-30% Difficult to obtain Price increase for replacement work and delays in starting

We will explain the latest price increase situation for building materials and the impact currently occurring on-site.

■ Thinner (solvent)

As it is an essential material for paint, it has a significant impact on the entire painting work.
It is mainly used for diluting paint and cleaning painting tools.

Without dilution, weak solvent paint cannot achieve a clean finish.

All manufacturers have suspended shipments.

■ Latest information by paint-related manufacturers as of April 25, 2026

  • SK Kaken

    ・From April 21, 2026, solvent main products will increase by 20-30%
    ・From May 11, 2026, water-based paint will increase by 15-25% / solvent products by 20-30% / powder products by 10-15%
    ・From April 13, 2026, shipments of solvent primer and rust preventive will be suspended
    ・From April 21, 2026, orders for water-based primer materials will be suspended
    ・From April 23, 2026, orders for premium roof silicone paint will be suspended
    ・As of April 25, 2026, delays in shipments of weak solvent paint

  • Aica Kogyo

    ・From shipments on May 1, 2026, paint prices will increase by over 20%
    ・As of April 15, 2026, delays in delivery of Jollypat and climate material products for the time being

  • Kikusuikagaku Kogyo

    ・From April 22, 2026, shipments of primers will be suspended
    ・From May 1, 2026, all products will increase by over 20%
    ・From June 1, 2026, all cement-based products are expected to increase by 10-20%

  • Nippon Paint

    ・Order stoppage for primer materials from April 17 to 25, 2026 (extension possible)

  • Mizutani Paint

    ・Price increase of 20-50% for all products starting from shipments on May 11, 2026
    ・Suspension of various primer shipments from April 20, 2026

  • Rock Paint

    ・As of April 25, 2026, shipment restrictions on primer paint

  • Higashi Nippon Paint

    ・Price increase of 20-70% for all products affected by the situation in the Middle East starting from shipments on May 7, 2026

  • Dainichi Giken

    ・Price increase of 20% for Randex Coat and FC Coat starting from April 1, 2026

  • Sunday Paint

    ・Price increase of 3-5% for rust-proof spray and others starting from April 14, 2026

  • Otani Paint

    ・Price increase of 30-50% for all products starting from May 1, 2026

  • Daido Paint

    ・Temporary suspension of shipments starting from April 15, 2026

  • Robal

    ・Price increase of 10% for shipments starting from May 7, 2026

  • Chugoku Paint

    ・Price increase of 40% for paint products starting from May 1, 2026

  • Oriental Industry

    ・Price increase of 10-30% for some products starting from May 1, 2026

  • Suzuka Fine

    ・Price revision for solvent-based paints starting from May 1, 2026
    ・Price revision for water-based paints starting from May 11, 2026

  • Seika Japan

    ・Price increase of 12-30% for shipments starting from May 2026
    ・Implementation of shipment restrictions starting from April 10, 2026

  • Astec Paint
    ・As of April 25, 2026
    [Out of Stock] General thinners / Shanetsu Top One / Epoxy Power Metal / Fluorine Steel Plate Power Primer / Epoxy Power SS Reinforced Sealer / Excel Roof Surf / Monier Power Primer / Epoxy Power Sealer
    [Shipment Restrictions] Thermotech Metal Primer / Thermotech Sealer / Epoxy Power Sealer / Excel Epoxy Primer / White Filler AII / Epitech Filler
    [Shortage Products] Max Shield / Excel Epoxy Sealer / Epoxy Power Sealer (transparent only) / Premium SS Sealer Primer / Super SD Clear Inorganic / Elastic Epoxy Sealer

■ Latest Information by Sealing Material Manufacturer as of April 25, 2026

  • Sunstar Giken

    ・Price increase of 30% for sealing materials, adhesives, and primers starting from May 2026
    ・Shipment restrictions on all caulking starting from April 10, 2026

  • Konishi

    ・Price increase of over 20% for all sealing products starting from May 2026
    ・Suspension of “Bond” product shipments starting from April 21, 2026

  • Cemedine

    ・Suspension of shipments for all sealing materials starting from April 20, 2026

  • Sunrise

    ・Order acceptance will be suspended from April 13, 2026

  • Auto Chemical Industry

    ・Shipping restrictions will be in place from April 9, 2026
    ・All products will see a price increase of over 20% starting May 7, 2026

  • Toko Industry

    ・Prices will increase by 30% for shipments starting May 2026

  • Sharp Chemical Industry

    ・Solvent-based products will see a price increase of over 40% on April 20, 2026, and other products will increase by over 20%

  • Shin-Etsu Chemical Industry

    ・All silicone products will see a price increase of over 10% on April 18, 2026

  • IG Industrial
    ・Shipping restrictions on metal building materials sealants will be in place from April 18, 2026

  • Astec Paint
    ・As of April 25, 2026, all sealing materials are currently suspended from shipping

■ Insulation Materials

・Price increases of around 40%
・Production halts and difficulty in procurement

Particularly, foam insulation materials are strongly affected by a shortage of raw materials.

  • JSP (Miraforum)

・Price increase of about 40%

(Due to raw material shortages, instability is expected to continue)

■ Roofing Materials and Auxiliary Materials (Roofing, Purlins, etc.)

Roofing Materials Related

  • Nichiwa

    ・As of April 25, 2026, there are shipping restrictions on asphalt shingle materials “Alma”

  • Owens Corning

    ・Starting June 2026, “Oakridge Super” will see a price increase of 25%

  • Asahi Fiberglass

    ・Starting July 2026, “Ridgeway” will see a price increase of 30%

    ※Currently, only price increases for shingle materials have been reported, but there is a possibility that steel roofing materials will also increase in price starting June.

Roofing Related

  • Tajima Roofing

    ・All roofing products will be suspended from shipping starting April 9, 2026. Currently, shipping is still suspended.
    ・A price increase of 40-50% will be implemented for shipments starting May 1, 2026

  • Jouyu Pulp Industry

    ・As of April 25, 2026, there are shipping restrictions
    ・A price increase of 30-40% will be implemented for shipments starting May 1, 2026

  • Nisshin Industry

    ・Shipping will be suspended starting April 10, 2026
    ・A price increase of 40% will be implemented for shipments starting April 21, 2026

  • Nanaou Kogyo

    ・As of April 25, 2026, shipping restrictions are in place.
    ・From May 1, 2026, shipping prices will increase by 40-50%.

Resin Penetration Boards

  • Keimyu

    ・As of April 25, 2026, shipping restrictions are in place for the resin penetration board “Tafumok.”

  • Fukubi

    ・As of April 25, 2026, shipping is halted for the resin penetration board “Ecolumber.”

Structural Plywood

  • Structural Plywood 12mm

    ・As of April 25, 2026, purchasing restrictions are in effect.

Polycarbonate Related (Corrugated Sheets and Polycarbonate Panels)

  • Takiron

    ・From May 1, 2026, a 20% price increase on “corrugated polycarbonate,” “panels,” and “deck materials.”

  • Sumitomo Bakelite

    ・From May 1, 2026, a 20% price increase on corrugated polycarbonate, etc.

■ Rain Gutters

  • Sekisui Chemical

    ・From May 20, 2026, a 20% increase on rain gutters, 30% on PVC pipes, and 20% on deck materials.
    ・As of April 25, 2026, shipping restrictions are in place for rain gutter-related products.

  • Panasonic

    ・As of April 25, 2026, shipping restrictions are in place for rain gutter-related products.

  • Denka

    ・As of April 25, 2025, shipping restrictions are in place.

※Although Panasonic and Denka have not announced price increases, there is a possibility of increases occurring between June and July.

Inventory and Arrival Status of Kakeru Koumuten’s Materials [As of April 25, 2026]

Material Name Stock Status Details Painting and Waterproofing Related Thinner △ Stock is available until the end of June at a normal pace. Rust Preventive 〇 It is difficult to obtain, but stock remains until the end of July. Low Solvent Paint △ If it is a special color, the arrival may be delayed. Stock of low solvent roof paint and clear paint is also limited. Water-Based Primer Paint 〇 Although it is difficult to obtain, we still have stock available until the end of July. Water-based topcoat paint 〇 The paints we frequently use are delayed, but they are somehow being delivered. Painting protective materials 〇 We have stock available until the end of August. Sealing materials × It has become difficult to obtain high-durability sealing (SR Seal H100, Auton Exceed). Polyurethane waterproofing materials
Topcoat-related × There is a possibility that we will not be able to accept polyurethane waterproofing work after mid-May. Stock for topcoat-related materials will be available until the end of June. Roofing and exterior wall materials Roofing Material (Shingle) 〇 No issues with current stock Roofing Material (Metal) 〇 No issues with current stock Roofing Felt × Modified asphalt roofing
New liner roofing
The above roofing sheets are in stock until the end of June.
The adhesive roofing Tadi Self Cover is only available until mid-May. Vapor-Permeable Waterproof Sheet 〇 No issues with current stock Resin Base Material 〇 Difficult to obtain, but our company uses a lot of metal ridge base, so we don’t use much of it originally.
We have stock available until the end of August. Metal Siding 〇 No issues with current stock Fiber Cement Siding 〇 No issues with current stock Wood Base (e.g., Strips) 〇 No issues with current stock Structural Plywood 〇 No issues with current stock Polycarbonate Wave Sheets 〇 No issues with current stock Adhesives 〇 No issues with current stock Rain Gutter Related △ There are delays in stock arrival.
If the quantity is large, there is a possibility of causing delays.

The inventory and arrival status are unstable and fluctuate from time to time.

■ Current Issues

  • The validity period of estimates is becoming shorter
  • Contracts based on securing materials are increasing
  • The risk of construction delays is rising
  • Suspension and postponement of construction

    The most serious issue is the situation of not only “price increases” but also “materials being unavailable”.

■ Impact on Customers

Item Impact Details
Estimate Price fluctuations are severe and cannot be maintained for long periods.
There is a possibility that contractors may rush contracts citing price increases after the estimate.
Construction Period Waiting time until construction starts
Suspension or postponement of construction
Cost Tends to be higher than before; there is a risk of bankruptcy after advance payment has been made
Construction Content Increased proposals for material changes
There is a possibility that contractors may not use appropriate materials

【Important】 Future Measures

  • Early consultation and inspection will make it easier to secure materials
  • Making early decisions after estimates is important to prevent price increases, but even if rushed, it is crucial to obtain multiple estimates and make careful decisions
  • Choosing contractors with procurement capabilities is important
  • Confirm whether payment after completion without advance payment is possible

Summary

The current building materials market is experiencing three simultaneous issues: price increases, shipping restrictions, and difficulty in obtaining materials.
For those considering exterior renovations, taking action early is crucial.

In the future, there is a possibility that some companies may go bankrupt.
It is wise to avoid advance payments as much as possible during construction.
Kakeru Koumuten Co., Ltd. requires payment only after the completion of the work.

Our company is also making efforts to procure materials, but depending on the nature of the work, there may be delays.

When considering exterior renovations, it is important to take your time and obtain estimates from at least three companies, even if you are pressured to contract due to planned price increases!

Leave your exterior renovations to Kakeru Koumuten Co., Ltd.!

Our company provides comprehensive services from scaffolding setup to roof work, exterior painting, and sealing work.

Taking into account the availability of materials, we will provide the best proposal as soon as possible!
Please note that the validity period of estimates may be shorter than usual depending on the work, but we encourage you to obtain estimates from other companies and make careful decisions.

Please feel free to consult us about even the smallest matters.

Click here for free inspections and inquiries

Service Areas

Tokyo

Akiyama City / Akiruno City / Adachi Ward / Arakawa Ward / Itabashi Ward / Inagi City / Edogawa Ward / Ome City / Edogawa Ward / Ome City / Ota Ward / Katsushika Ward / Kita Ward / Kiyose City / Kunitachi City / Koto Ward / Koganei City / Kokubunji City / Kodaira City / Komae City / Shinagawa Ward / Shibuya Ward / Shinjuku Ward / Suginami Ward / Sumida Ward / Setagaya Ward / Taito Ward / Tachikawa City / Tama City / Chuo Ward / Chofu City / Chiyoda Ward / Toshima Ward / Nakano Ward / Okutama / Nishitokyo City / Nerima Ward / Hachioji City / Hamura City / Higashikurume City / Higashimurayama City / Higashiyamato City / Hino City / Fuchu City / Fussa City / Bunkyo Ward / Machida City / Mitaka City / Minato Ward / Musashimurayama City / Musashino City / Meguro Ward

Kanagawa

Aikou-gun Aikawa Town / Ashigarakami-gun Oi Town / Ashigarakami-gun Kaisei Town / Ashigarakami-gun Nakai Town / Ashigarakami-gun Matsuda Town / Ashigarakami-gun Yamato Town / Ashigarashimo-gun Hakone Town / Ashigarashimo-gun Manazuru Town / Ashigarashimo-gun Yugawara Town / Isehara City / Odawara City / Kamakura City / Kawasaki City / Kawasaki City Kawasaki Ward / Kawasaki City Asao Ward / Kawasaki City Saiwai Ward / Kawasaki City Takatsu Ward / Kawasaki City Tama Ward / Kawasaki City Nakahara Ward / Kawasaki City Miyamae Ward / Koza-gun Samukawa Town / Zushi City / Chigasaki City / Nakagun Oiso Town / Nakagun Ninomiya Town / Hadano City / Hiratsuka City / Fujisawa City / Miura-gun Hayama Town / Miura City / Minamiashigara City / Yokosuka City / Yokohama City / Yokohama City Aoba Ward / Yokohama City Asahi Ward / Yokohama City Izumi Ward / Yokohama City Isogo Ward / Yokohama City Kanagawa Ward / Yokohama City Kanazawa Ward / Yokohama City Konan Ward / Yokohama City Kohoku Ward / Yokohama City Sakae Ward / Yokohama City Seya Ward / Yokohama City Tsuzuki Ward / Yokohama City Tsurumi Ward / Yokohama City Totsuka Ward / Yokohama City Naka Ward / Yokohama City Nishi Ward / Yokohama City Hodogaya Ward / Yokohama City Midori Ward / Yokohama City Minami Ward / Sagamihara City / Sagamihara City Midori Ward / Sagamihara City Minami Ward / Sagamihara City Chuo Ward / Ebina City / Atsugi City

・Saitama Prefecture, Chiba Prefecture, and parts of Yamanashi Prefecture (please consult us)

Click here for helpful information on other exterior renovations!

よろしければこちらもご覧ください！

・After Maintenance by Kakeru Koumuten Co., Ltd.
・Construction Menu and Price List by Kakeru Koumuten Co., Ltd.
・Staff Blog and Announcements by Kakeru Koumuten Co., Ltd.
・Explaining the Importance of Comparing Estimates!
・[Kohoku Ward, Yokohama]｜Waterproofing Work｜Balcony Top Coat Completed!
・[Machida City, Tokyo]｜Exterior Wall Painting｜Exterior Wall Painting Using Diamond Super Celan Flex Completed!!
・[Machida City, Tokyo]｜Exterior Wall Cleaning｜Exterior Cleaning Without Scaffolding Completed!
・[Takatsu Ward, Kawasaki City]｜Balcony Renovation｜Replacement of Handrail and Cap Completed!
・Popular Colors for Exterior Wall Painting! Recommended Color Combinations Introduced!
・Introducing Construction Methods According to the Type of Roof Construction and Degradation Situation!
・Can Roofs with Solar Panels Be Painted? Introducing Maintenance Methods!
・Points to Note and How to Respond When a Door-to-Door Contractor Points Out “Your Roof is Damaged!”
・Is Exterior Wall Painting Necessary? Introducing the Risks of Ignoring It!
・How Much Does Exterior Wall Painting Cost? Are There Tips to Reduce Costs?
・What is the Best Time for Exterior Wall Painting? How to Determine the Best Timing!

 

Consultations via LINE are also very welcome◎

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For roofing, guttering, and exterior work and repairs in Kanagawa, contact Kakerukoumuten Co., Ltd..

AAA is a young company with an average age in the early 20s, but our technology is second to none.

One of our greatest strengths is that we can do all of our own scaffolding, roofing, and painting work. In this industry, where work is generally divided, we are able to provide a complete set of services, which saves time and effort in management and reduces costs. Above all, if there is any trouble, we will come to you right away!

We can confidently declare this. We are the youngest and most friendly renovator in Kanagawa!

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