PUMICE LINERS - Your cost effective way of building a chimney

Details & Services

Find out more about the details and services for the PUMICE LINERS chimney, such as the structure, detailed technical data or suitable services. You also have the option of downloading flyers or brochures about the product.

Hover to zoom

Structure of the system

Stove in recess option: Our pre stressed lintels must be installed above the fireplace recess , for this method a support plate is required under the support block. Alternatively a suitable cast-in-situ concrete slab lintel can be created above the fireplace recess. (See Isokern standard drawings for hole size depending on diameter of chosen flue). The support block is bedded onto the slab lintel using weak mix mortar. A stainless steel adaptor is used to connect from the support block to the stove flue pipe. This adaptor is pushed up onto the support block spigot (fibre rope should be used to create a seal). It is recommended to have a minimum of 600mm length of flue pipe before connecting to the chimney.

Flue liner installation

The flue liners are installed socket uppermost and sealed with Isokern lip glue. Lip glue joints should be approximately 2mm thick. A special bag is provided for ease of application. Remove any excess glue to maintain a smooth surface. Clad the liners with a minimum of 100mm thick suitable masonry. A minimum thickness of 15mm leca insulation must be installed between the liners and masonry. Mix 20 parts leca to 1 part opc cement and a small amount of water.Make sure it is well mixed before using.

You must provide adequate clearance from combustible material in accordance with Building Regulations. Combustible materials must be 200mm from the inner surface of flue liner or 40mm from the outside of the masonry chimney unless it is a floorboard, skirting board, dado or picture rail, mantel-shelf or architrave. Fit appropriate lead dpc’s and flashings in accordance with the relevant regulations. Isokern recommend that the lead tray should be dressed up the outside of the flue liners to avoid a weak joint. Weep holes should be provided above the tray for moisture drainage. Terminate the chimney to the correct height in accordance with document J of the Building Regulations. The chimney can be finished by flaunching (1:3 cement/ sharp sand) either around the Isokern flue liner or a suitable chimney pot. Approved rain caps can be used to help prevent water entering the flue.

If bends are required in the chimney make sure adequate support is provided and always backfill with leca insulation mix.

Liners can be cut between bends to achieve a required offset distance.

A steel collar as well as lip glue must be used for any cut joints.

A maximum of 2 complete offsets (4 bends) are allowed per chimney and the angle must not be greater than 45˚ from the vertical.

Use and maintenance

After installation is complete tests and checks should be carried out. A chimney notice plate must be completed and permanently fixed in the dwelling, ideally near the electrical consumer unit. The checklist and notice plate are available from Schiedel.

The chimney should be left for at least 72 hours before use, then start with only small fires for the first week and gently increase thereafter. The chimney should be swept at least twice a year, once before the heating season and once after the heating season. You may need to sweep during the heating season depending upon use. The brush should be a medium density polypropylene bristle type and should be the same diameter as the flue. Steel brushes must not be used to sweep Isokern pumice flues. Always follow the appliance manufacturer’s operating instructions. Always burn approved fuels or dry seasoned wood. Avoid burning unseasoned wood and slow burning of solid fuels as this can produce excessive soot and condensation which can in turn cause soot fires and damage. If correctly installed, operated and maintained these systems should last the life of the dwelling.

Suitable services

At Schiedel, service is more than just a friendly voice on the phone. Service is an essential part of the Schiedel total package. In addition to product quality, safety, reliability and innovative strength as well as a good price-performance ratio, customer satisfaction is significantly influenced by our service. We offer the following services for the ABSOLUT energy-saving chimney:

Your personal contact

Are you looking for tips or a sales advisor in your area? Simply enter your zip code and you will find the contact details of the sales advisor in your area.

TO THE SALES REP SEARCH

Frequently Asked Questions - FAQ

In our FAQs you will find the most important answers to Schiedel products and their application.

TO THE FAQs

Technical advice & customer center

Find the right contact person for our ceramics and stainless steel customer center here.

TO CONTACT & ADVICE