Bitumastic sealant. Joint Sealants and Adhesives Waterproofing Cement Additives Fosroc commenced its Indian operations in 1981 and established a 100% subsidiary in 1999. Bitumastic sealant

 
Joint Sealants and Adhesives Waterproofing Cement Additives Fosroc commenced its Indian operations in 1981 and established a 100% subsidiary in 1999Bitumastic sealant  FOSROC NITOSEAL MB175 600ML

List Price: $130. BITUMASTIC (785. Joint dimension of 4X anticipated movement allows proper function of high performance sealants even if applied at temperature extremes. The sealant on curing forms a tough and flexible seal. 64 LBS. seal joints with trowelable bitumastic or hi-m 5ØØØ 6" below and above. Sealants & Accessories. When properly utilized this product adheres the membrane and seals the laps to prevent water intrusion. Interior Coating: The interior of all rehabilitated manholes shall be rendered watertight, chemically resistant, and abrasion resistant through the use of a SAWS Bitumastic® 300 M PRODUCT DATA SHEET June 2019 0165 Page 2 of 4 SUBSTRATES & SURFACE PREPARATION Steel Immersion: SSPC-SP10 Non-Immersion: SSPC-SP6 SSPC-SP2 or SP3 as minimum requirement. It is thermoplastic in nature and can be used over a wide range of atmospheric conditions with good film properties like adhesion, smoothness and low dirt pick up. Generally, you can either use a mastic caulking sealant bulk barrel gun, inserting the material directly into it or use. 97. 73 £ 15. , Ltd. If using a polyurethane type of sealant, use a masking tape (polyethylene tape) to separate SikaSeal®-416 Joint Filler from the sealant. Product Guide V7 - Sealants 1 T D S _ B i t u m a s t i c G P _ G C C _ 0 7 1 6 General purpose bitumen rubber mastic sealant BITUMASTIC GP is a single component, solvent based bitumen rubber mastic joint sealant. 332. Order Ultra Crete Bitumen Cold Joint Sealer & Tack Coat Black 750ml at Screwfix. section a - a concrete manhole collar not to scale collar height varies (8" min. Not intended for use in expansion joints or joints that. 90 - $25. 8 to Basis of Payment as follows:Ultra Construction Bitumastic Sealant usually use for the vertical joints either of bridges, canal lining joints or the joints of any big tall building. B ased on polymer modified bitumen carried in a hydrocarbon solvent. . 5 mm) if no backing is used). Adawall polymer modified Bitumen Rubber Sealing Strip is designed to seal all types and sizes of joints in precast concrete manholes, box culverts, inspection chambers, pipes etc. swimming pools, aquariums, etc. SabreFix BS is a versatile and solvent-based plasto-elastic bituminous sealant that has been specially developed for sealing and repairing bituminous surfaces. ; Kent Seal, as manufactured by Hamilton-Kent, Inc. 1. Simple to apply by roller or brush, our tarmac sealer restores colour and re-introduces lost protective resins. Order: 1,000 Pieces Contact Now. common uses: weathersealing external door and window frames, expansion joints in brickwork. 4. 228 Bitumastic is a bituminous elastomeric sealant with a flexibility and elasticity in a wide range of temperatures. Sealant should be gunned into joint at mid-point of designed expansion and contraction to maximize accommodation of movement. With products available from trusted brands like Corrapol, Axiome and Everbuild, find everything you need to make your next roofing repair or installation a success. Surface will be ready to use after 1 hour. Can be applied immediately (without heating), adheres to most common surfaces. Silicone sealant is a durable and long-lasting adhesive that works well for many different construction applications. 50 Coating, 5 PAL, #505. Bitumastic A51 Mastic Royston. 707 Chiranjiv Tower 43 Nehru Place New Delhi 110 019 +91 11 4656 1359. View all: Bostik Specialist Paints. Acrypol+ White Waterproof Coating - 2. ULTRA ACCELERATOR 510. Provides a durable high impact protective coating against corrosion, water, stones and salt. g. When installing the cable over concrete, wood or existing tiled floors refer to the manufacturer’s standard guidelines. See also wall thickness design calcium aluminate cement, 95 cement: calcium aluminate, 95; hydraulic, 96 cementitious, 88–89, 95; manhole after cementitious base, 53f. NanoFlex PU is a single part gun grade moisture curing low modules polyurethane sealant which cure at room temperature 25°C to an environmentally safe, tough flexible sealant. 5-Gallon White Elastomeric Reflective Roof Coating (10-year Limited Warranty) Model # KS0063600-20. 5 to 5 rolls. Carboline - Bitumastic 300M. Application is simple and easy, required no heating. Bituminous membranes are perfect for waterproofing roofs, basements, below-ground structures, bridges and other structures. . View store information. Description Bitumen rubber mastic sealant Bitumastic is a single component, solvent based bitumen rubber mastic joint sealant. manholes shall be of watertight construction, utilizing either bitumastic sealant or rubber gasket between adjacent manhole sections. General purpose, solvent-based. Màu sắc: Màu đen. As they’re are solvent-based, rubberised products, butyl rubber sealants offer low to. Time and temperature, as well as the sealant composition, will affect this rate. 79 / Gallon. The product forms a surface skin, but the mass below remains soft to allow for moderate movement. View all: Bostik Specialist Paints. 171, Industrial Area Doha, Qatar +974 4460 1583 / 84 / 85 ; info@teyseerbm. 66 Modified Bitumen Adhesive is a bituminous based adhesive sealant designed for the application and repair of SBS modified bitumen single-ply membranes and bituminous single-ply membranes. The mastic sealant is modified to make the sealant thixotropic and slump free when applied on vertical. 5 × 5 × 23 cm. concrete 3/4" rock 3 min, base, precast manhole greenville public works. Product. Bitumastic is a single component, solvent based bitumen. Bitumastic is a single component, solvent based bitumen rubber mastic joint sealant. It is designed to replace traditional hot pour crack sealants which lack structural strength and other more rigid patches like cold patch or hot mix that are prone to. View all: Bostik Roof Repair. BITUTHENE® Mastic is a rubberized, asphalt-based mastic. Find My Store. Product Description. 6. It has excellent adhesion to concrete,. com | North America customer service: 1-866-333-3726 We hope the information here willbe helpful. The mortar should be raked out at least ¾ in. Caulking & Sealants. 4m to be constructed. Top Rated. 0 mils (50-75 micron) Concrete or CMU Concrete must be cured 28 days at 75°F (24°C) and 50% relative. For instance, the force (psi) to compress the sealant the initial 10% to 50% may. Suitable for brush application only. BITUMASTIC GP. Primers & Cleaners. Waterproofing. Tiling. Available in 20 Kg tubs. Dr. The sealant on curing forms a tough and flexible seal. Bitumastic-50 is perfectly suited for corrosion protection of steel pipe,. General purpose bitumen rubber mastic sealant BITUMASTIC GP is a single component, solvent based bitumen rubber mastic joint sealant. Lasting protection in all climates. all joints, double layer 1 1/4" width. Ultra Bitumastic Sealant available in. +. A multipurpose, water-based, bitumen product supplied in a paint consistency. Retains compressibility through a range of deflections. a tough and flexible seal. Ultra Chemicals Pvt Ltd Sindh · December 17, 2021 ·. Joint sealing facilitates construction, as a number of components made of different materials are used. Application is simple and easy, required no heating. 6-0. (9) $79 . Technical. It has excellent adhesion to. £ 25. Bitumastic sealant. ,. Bitumastic Concrete Repair Sealant Asphalt Crack Sealant $1. 8m²/Ltr. It is a non-staining sealant that cures to a firm, flexible, tear-resistant rubber. 3. Application of a tarmac sealer is the best and easiest way to protect tarmac or asphalt from loss of colour, fretting stones and cracking. Low to high temperature workability: 30°F to 120°F (-1°C to +49°C) Rugged service temperature: -30°F to +200°F (-34°C to +93°C) Excellent chemical and mechanical adhesion to clean dry surfaces. Bitumen paint is suited to many different applications because of its weatherproofing, corrosion resistance and adhesive properties. Ultra Construction Bitumastic Sealant usually use for the vertical joints either of bridges, canal lining joints or the joints of any big tall building. It all began in 1970, selling butyl rubber sealants to the precast concrete industry and earning us the reputation as the watertight concrete experts. insulation as required. Waterproof. The mastic sealant is modified with non asbestos fibres to make the Bitumen Sealant. substrates. The VOC (Volatile Organic Compound) content is 225 g/L. BITUMASTIC #50 1 GAL; TREMPROOF 250 GC TROWEL 5 GAL; TREMPROOF 250 GC SL 5 GAL; 5 gal VULKEM Gray 346 Top Coat; We’re Hiring! Build your career with Cemstone. (No reviews yet) Write a Review. Tarmaseal™ soaks into the Tarmac/Asphalt. MIX INSTRUCTIONS: Mix lightly prior to use to assure. For instance, acrylic joint sealants are used for filling joints between drywalls, floors-to-walls, windows and door frames, and other kinds of non-civil and low movement joints. Systems Foundation and. It shows good adhesion to concrete, aluminum, glass, and stone materials. Our Product Line. When dry, forms an odourless and taint free black film that is resistant to most salt solutions, dilute acids and alkalis, water and alcohol ; MULTI APPLICATION - Suitable for use on metal concrete felt wood timber for applications including roofs sheds & marine boatsbitumastic sealant typ. Get it Nov 28 - Dec 1. (£5. General purpose, solvent-based. It dries to a flexible black material, which remains soft. 40. b. Applies easily in temperatures as low as 30°F. waterproofing paint. 50 Coating, 5 PAL, #505. Bitumastic sealant is a bituminous, elastic mass that has perfect adhesion to building surfaces (concrete or wood, plaster, metal) that is suitable for. Fixit Torchshield applied all over the terrace, must be finished with a coating of aluminum paint for non-foot traffic area. Bitumastic is a single component, solvent based bitumen rubber mastic joint sealant. Thompson's Black Emergency Roof Seal - 1L. Thanks to its waterproofing qualities, it is widely used in construction. com ofrece bitumastic sealant de alta calidad y asequibles. Advantages of elastomeric polyurethane sealants include: Good adhesion to a variety of substrates. Select the department you want to search in. The excess sealant is then cut to length to create a butt joint. ft. manholes shall be of watertight construction, utilizing either bitumastic sealant or rubber gasket between adjacent manhole sections. 5kg. Further discoveries reveal bitumen was also used in the same region, around a thousand years later, to waterproof the Great Bath at. 50 per L. 99Inc Vat. Product Range A global brand STOPAQ. Bituminous mastic in water emulsion, replacement for hot oxidized bitumen. Bituminous coatings are mainly composed of hydrocarbon molecules. a tough and flexible seal. £22. , Ltd. Mastic Sealant. Brochures. Sealants for . Bitumen Joint sealant. c. Solvent Base . Cleanup of equipment containing uncured material may beSelecting the right Sealant for your project. A joint sealant for building walls and wall systems, Backerseal is an economical, precompressed, secondary joint sealant to field-applied caulking. 6 / Piece. , Ltd. Flashband is easily applied using just hand pressure and a seam roller and is ideal for new build, maintenance and repair projects, including:These attributes form the foundation for Concrete Sealants. Then he and Kevin install a rubber-protected roof over an addition. concrete grade rings typ. Apply the sealant after the primer dried. Tên sản phẩm: Chất trám khe Bitumastic. 4-10. Can be used as a damp proof membrane and as part of a designed structural waterproofing system. BITUMASTIC Elastic Bitumen Mastic Bitumastic Cat No. 00. Architectural and industrial maintenance regulations limit the VOC content in products classified as architectural coatings. -40 to 93°C. reinstall castings complete frame seal. Suitable for brush application only. 75-Gallon White Silicone Reflective Roof Coating (Limited Lifetime Warranty) Model # AP-5765. Overview. 2 Butyl Rubber Sealants AASHTO M 198 – Joints for Circular Concrete Sewer and Culvert Pipe Using Flexible Watertight Gaskets ASTM C 972 – 00(2011) – Standard Test Method. Care should be taken when storing the membranes on sites and should not be kept within close proximity of any sharp or protruding edges to avoid. Adheres perfectly to surfaces such as porcelain (tiles etc. Steel Work Design. Everbuild Everflex Roof and Gutter Sealant, Butyl Based Sealant and Adhesive for Roofing, Black, 295 ml. 1980. Weight: 10. Interior Finishing. One On One 48mm x 5m Heavy Duty Double Sided Sealing Tape. Product information. Multi-Purpose Polyurethane Sealant for Construction Sheet Metal Roofs Window Perimeters Sealing and Bonding FOB Price: US $1. Total Product Weight. This item: Bitumastic 107-50-5 No. Their movement accommodation. of pipe 3000 p. I spent lots of time cleaning off what appeared to be a caulk gun applied bitumastic sealant. Application is simple and easy, required no heating. The mastic sealant is modified with non asbestos fibres to make the sealant thixotropic and slump free when We sell specialist bitumen mastic joint sealants for sealing joints in roads, kerbs, runways, garage forecourts or anywhere else where a concrete to bitumen or bitmuen to bitumen mastic sealant is required. manhole shall be 5'-0" Ø if sewer main is greater than 10" Ø, or if three or more sewer main pipes connect to manhole, or if otherwise specified on drawings. Touch-Dry in 6 Hours, Fully Dry in 24 Hours. Sealant is applied as a continuous ring around entire joint. Fast curing speeds. tank exterior shall be coated tank exterior shall be coated with bitumastic sealant. Concrete floor. Type Of Bitumen: Asphalt. Ideal for use under vehicle chassis, wheel arches, door sills, fuel tanks and other high impact areas giving a tough, flexible, anti-chip, anti-corrosive coating. Fosroc has four state-of-the-art manufacturing facilities at Bengaluru, Karnataka; Ankleshwar, Gujarat; Kolkata, West Bengal and Keshwana, Rajasthan. Hot Sell Waterproof Paste Silicone Sealant Liquid Quick Drying Structural Sausage Sealant , Find Complete Details about Hot Sell Waterproof Paste Silicone Sealant Liquid Quick Drying Structural Sausage Sealant,Thread Locker Sealant,Quality Pre-applied Thread Sealant,Bitumastic Sealant from Adhesives & Sealants Supplier or Manufacturer. SKU: OR-107-50-5. All angles & abutments upstands should be sealed with extra care to ensure perfect bondage. Quick and easy application. B ased on polymer modified bitumen carried in a hydrocarbon solvent. C-56 Joint Sealant is designed to fully comply with current ASTM Standards and Specifications as required by Federal, State, and Local agencies for use by the Title: Sikafloor® Duraseal Author: Sika Australia Pty Limited, ABN 12 001 342 329, aus. Climate adaptability- General sealant is very sensitive to temperature changes of climate, such as when the temperature dropped 10℃, the performance of sealant will be reduced by 30% or more. Can be applied to damp surfaces. VOC (Al Sa’fat DG ESlimit is max. This is a liquid sealant (asphalt emulsion), modified with polymers and also born from a modified asphalt molecule and custom refinery; which provides resistance, durability, resilience and. The sealant on curing forms a tough and flexible seal. United Kingdom. 750 ml. Apply the sealant after the primer dried. Bitumastic is a single component, solvent based bitumen. Weather-Resistant. It provides excellent adhesion to concrete, brickwork, asphalt, and most construction material substrates. ULTIPATCH Overbanding thermoplastic tape creates a waterproof seal to stop water ingress, reduces the issues with freeze / thaw damage and prolongs the life of the repair. Key benefits - Fixing of. It is ideal for fast repairs of cracks, holes and fractures on roofs and between old bitumen membranes and can be applied over a multitude of surfaces including tin, aluminium, copper, brass. High puncture resistance and joint water pressure resistance. 65. Order Ultra Crete Bitumen Cold Joint Sealer & Tack Coat Black 750ml at Screwfix. It is an eco-friendly option. Polyseal PS GG is specifically designed to be used as a watertight seal for moderate movement and control joints. 7 kg. MasterSeal - Waterproofing products, sealants, foams, membranes and air barriers How does MasterSeal work? The MasterSeal portfolio of hand and spray-applied waterproofing products are formulated to stop water leakages and moisture ingression in a variety of new and existing structures. Do not apply SS1 when substrate surface temperatures exceed 176°F (80°C). Single component; does not require mixing, thereby saves time. Đóng gói: 20kg / thùng. NURMASTIC can be used for sealing and waterproofing of joints, cracks, holes, etc. by. Industrial sealants from Henkel serve the automotive, electronics, aerospace, metal, durable goods, consumer goods, maintenance and repair, and packaging industries. both ways, bottom and sides. 12022. The breadth of the product range available to professional users varies from country to country. See also coatings and liners542 High Strength Anaerobic Sealant Adhesive Seals Hydraulic And Pneumatic Fittings , Find Complete Details about 542 High Strength Anaerobic Sealant Adhesive Seals Hydraulic And Pneumatic Fittings,High Strength Anaerobic Sealant Adhesive,Bitumastic Sealant,Crowfoot Fitting from Adhesives & Sealants Supplier or Manufacturer-Shanghai. ULTRA ACCELERATOR 727. Separating incompatible sealants One of the frustrating ironies of waterproofing is that the two best and most frequently used waterproofing materials don’t like each other. Technical support Expanchem Fospak offers a comprehensive technical support service to specifiers, end users and contractors. Home. HYDRALASTIC 836 is suitable for use on interior or exterior concrete surfaces, where protection from water intrusion is desired. Seal the edges well into grooves & protect to seal with a polysulphide / polyurethane or a bitumastic sealant. In others, they allow things to move and the sealant creeps out. (0) $8 . The range includes coloured. FREE next day delivery available, free collection in. A bituminous coating is regarded as one of the least expensive ways to provide cathodic protection to pipes. Product dimensions, finish, head type, and thread length may differ from picture. The sealant on curing forms a tough and flexible seal. Technical Literature. Rtv Neutral Structural Silicone Sealant For Glass Roof 995 , Find Complete Details about Rtv Neutral Structural Silicone Sealant For Glass Roof 995,Silicone Sealant For Glass Roof,Neutral Silicone Sealant,Bitumastic Sealant from Adhesives & Sealants Supplier or Manufacturer-Qingdao Maxhonor New Material Co. Checking availability. 0 /5 · 53 reviews ·SEALING PROPERTIES. Place : Guangzhou, China. (Alkali-Aggregate Reaction Resistant)Asphalt Road Pavement Repair Hot Melt Sealant Road Crack Repair Sealant Bitumen Joint Sealant $1,700. Find My Store. com | North America customer service: 1-866-333-3726 We hope the information here willbe helpful. ULTRA SUPER PLAST 445. Usage/Application: Road Construction. The sealant on curing forms. Sealant / Thread sealant . The product can be used for both above-grade and below-grade applications. CIL BITUMASTIC A thixotropic, non-slump rubberized bitumen sealant. 8 yrs CN Supplier . Jap-151-- Polyurethane Adhesive Sealant For Bus Body/car Body Sealing/popular In South America Market , Find Complete Details about Jap-151-- Polyurethane Adhesive Sealant For Bus Body/car Body Sealing/popular In South America Market,Bitumastic Sealant,Car Body Pu Sealant,Automotive Pu Sealant from Adhesives & Sealants Supplier or. Their movement accommodation. Factory price mastic sealant of the best quality waterproof acrylic sealant $0. It has excellent adhesion to concrete, brickwork, asphalt and most construction material substrates. Bitumastic Bitumastic No. Sealants are also often commonly known as silicone sealants or mastics and are used when sealing areas that need a waterproof or airproof seal. Fixit Samshield XL is a self-adhesive waterproofing membrane based on a tropical grade of polymer modified bitumen. Bostik Flashband Self Adhesive Flashing Tape for Roofs is a flexible bitumen strip that bonds instantly to most building materials to provide a permanent, watertight seal. 0 /5 · 0 reviews ·Bitumastic Supplier - Globe Carbon Industries is a one of the most prominent manufacturer, exporter and supplier of Bitumastic in Mumbai, Maharashtra, offering Bitumastic for Concrete Flooring, Bitumastic Sealant at wholesale prices. For all control joints, mortar should be raked out of the vertical joints on both sides of the panels. Seal the edges well into grooves & protect to seal with a polysulphide / polyurethane or a bitumastic sealant. New Road Crack Sealing Machines Asphalt Crack Bitumen Sealing Machine Crack Sealant , Find Complete Details about New Road Crack Sealing Machines Asphalt Crack Bitumen Sealing Machine Crack Sealant,Asphalt Repair Machine,Road Repair Machine,Bitumastic Sealant from Supplier or Manufacturer-Shandong Youyi Machinery Technology Co. Flat tops, and between the ductile or gray cast iron ring (frame) and the uppermost adjustment ring or flat top: See Approved APL. all manholes will be vacuum tested. The sealant on curing forms a tough and flexible seal. Flooring. Bostik Bituminous Mastic for Roofs dries to a flexible. Pay in 30 days. $59431. Ferguson is the #1 US plumbing supply company and a top distributor of HVAC parts, waterworks supplies, and. Several sections have been laid on roads p 29/2, p 157/2, and p 2/1. 80/Ltr)Bitumastic . Value-added Services. Sticks and bonds rapidly and permanently to clean, dry surfaces. ULTRA POWDER 2000. For foot trafficked area, overlay with concrete screed mortar. Available in convenient rolls of required width that are easy to store and use. List Price: $130. 00Are you looking for Construction Chemicals in Pakistan? Phone: 0306-7522220; CONTACT US; FAQs; Select categoryapplying two rows of bitumastic sealant. Due to the fact that the scope for product use varies. Estimating SupplyMEL-ROL LM is a single-component, polymer-modified, cold-applied, water-based, liquid waterproofing membrane ideal for below-grade vertical seamless waterproofing applications. Although widely used, bitumen paint is mostly associated with roofing, particularly flat roofs. top of manhole 4,000# class "a" conc. This paint matches common roofing material. Looking for a seal against asphalt, bitumen based tarmac or similar? We sell specialist bitumen mastic joint sealants for sealing joints in roads,. service. Primer. The material's natural water resistance, combined with its strong adhesive properties, means it can prevent air and moisture from coming into contact with the substrates it coats—thus providing excellent. all manholes will be vacuum tested. ; Encapseal, as manufactured by Miller Pipeline Corporation; or approved alternate. com. LastiSeal 143 Brick & Masonry Sealer – Best Overall. Elastic / flexible. Sealants are also often commonly known as silicone sealants or mastics and are used when sealing areas that need a waterproof or airproof seal. A suitable primer is also applied before the sealant to ensure optimal adhesion. It has excellent adhesion to structural concrete, masonry and wood. The frames and grates or covers shall be cleaned and reset at the required elevation. Thanks to its waterproofing qualities, it is widely used in construction. Tool as required to properly fill joints and force sealant against joint. Water resistance. FOSROC NITOSEAL MB175 600ML. • The Sealtec Bitumastic Sealant is a proprietary product manufactured to comply with Para 9. (14) $8 . It can be used for joint sealing, crack sealing, water plug. Adhesives Admixture Grouts & Anchors Concrete Repairs Protective Coatings Industrial Flooring Surface Treatments DESCRIPTION Ultra Bitumastic Sealant is an excellent…Product Description. With our vast and efficient distribution network, we are able to deliver our range within the shortest possible time, for the sake of. 1 1/2" x 2" rubber-like gasket. View all: Bostik Specialist Paints. 1 gal Shop for 1 gal. Fixit. 7 install new castings and frame seal if required. 70 per M. (£5. Compare. grout non-shrink grout 8" rubber o-ring gasket or bitumastic sealant 3000 psi (min. 2. Greater cohesive and adhesive strengths. £24. Currently in Stock. In others, they allow things to move and the sealant creeps out. Bituminous waterproofing. Tools & Equipment. Over 40,000 products. Min Order: 2000. $8. , Ltd. The sealant on curing forms. sika. Bitumastic sealant should be covered with a floor-leveling cement. Service Temperature Range. Water-based, free of solvents and odours. comAging Resistant Non-corrosivejoint Sealant For Woodworking , Find Complete Details about Aging Resistant Non-corrosivejoint Sealant For Woodworking,Wood Silicone Adhesive,Door Silicone Sealant,Bitumastic Sealant from Adhesives & Sealants Supplier or Manufacturer-Qingdao Maxhonor New Material Co. Suitable for brush application only. Sika® MultiSeal. Vehicle Underbody Aerosol Seal. 0. . Coatings cannot be sold to the regions listed due to local regulatory limits. 75 gal. 0-3. Bituminous felt adhesive for roofs. ULTRA ANTI FREEZING C-10. formed and placed into service. External (LM) silicones are normally neutral cure sealants which automatically elicit a longer cure period by air, but ultimately have better adhesion and low modulus capabilities. The grooves will be sealed with a suitable mastic sealant (Bitumastic)*. Item # 1677632. NOTE: Bitumastic 50 is a self-healing coating and is designed to remain soft. (per type b repair specification) plus existing chimney less than 24.