GB2510376A

GB2510376A - Shuttering for providing a drip edge to a concrete chimney crown

Info

Publication number: GB2510376A
Application number: GB1301776.9A
Authority: GB
Inventors: Peter Gerald Watkin
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-01-31
Filing date: 2013-01-31
Publication date: 2014-08-06
Anticipated expiration: 2033-01-31
Also published as: GB201301776D0; GB2510376B

Abstract

A shuttering device for fitting around the top part of a chimney stack, better known as the crown of the chimney comprises a plurality of elongate sections (drip trays) with a overhanging drip edge upstand profile. The device forms shuttering for casting of a concrete crown with an overhanging drip edge. The crown directs rainwater away from the top part of the chimney stack and provides an overhanging drip edge which directs it away from the wall of the chimney stack. The chimney drip tray when installed creates a overhanging continuous drip edge all the way around the chimney stack. Ensuring rain water is directed away from the building protecting. Chimney stack from premature erosion of the fabric and the structure of the chimney stack. The chimney drip tray as been designed to modulate its self to fit any size chimney stack. Each chimney drip tray is factory pre-cut tray with a mitre-cut end, a plurality of such trays can be arranged around any size of chimney by matching mitred ends at the corners of the chimney stack and overlapping sections along the sides.

Description

Page 1 Chimney drip Tray Back ground information This invention Relates to a device for shuttering around the top part of a chimney stack better known as the crown of the stack. The purpose of this invention is to direct rainwater away from the building in doing so avoiding premature erosion of the fabric and the structure of the Building.

Until now shuttering around the top of a chimney stack (in wood) has always been the traditional way of making a concrete chimney cast around the crown. The down side to this method is when the temporary flat timber structure is removed more often than not it leaves no effective rain water drip. This unsatisfactory building practice allows rain water to run freely around the outside edge of the concrete cast back in the direction of the property. Apart from being unsuccessful this current working practice is both expensive and labour intensive Other unsuccessful methods still being used today for sealing off the crown area of a Chimney Stack are as follows, flat concrete patio type slabs which have no water drip, incorporated into their underside to prevent water running back freely towards the property.

The next method is the most widely used of all of all currents building practices.

Fluanching around the crown area of a chimney stack using a sand and cement based mortar mix. The end result is the cement mix finishes flush with the upper course of brickwork on the outside edge of the chimney stack. Thus allowing rain water to run over the edge of the stack and down the sides of the chimney stack causing premature erosion of the stack itself. All these traditional methods listed here are unsuccessful of course because none of them have solved the real problem associated with chimneys stacks. None of them prevent the flow of rainwater back towards the property, leading to, premature brick erosion, blown plasterwork, paint flaking off, and water leaks.

Page 2 Technical features of the-Chimney Drip Tray.

The Chimney Drip Tray a device which when installed forms an infill tray around the crown of the chimney stack. Bedded in and on wet cement mortar, designed to contain and act as a concrete shuttering. The Chimney drip trays outer overhanging edge can either be trimmed off against the chimney stack after use, or left in place. Made out of robust galvanized steel the Chimney drip tray is designed to stand up to the worst of the elements.

The chimney drip Tray can be laid in minutes by one man, unlike the old traditional wooden shuttering which is often time consuming and a two man job. The tray requires no nails, screws, dowels, or levelling packing to install. The material used is light weight and more uniformed in shape than wood which is often bent or distorted when purchased. Unlike a wooden structure this invention leaves no after mess or pegs holes in or around the chimney stack often associated with wooden shuttering.

Because Chimney stacks in general are so varied in size and shape until now shuttering around the crown area of a chimney stack was viewed as a Taylor made one off task. The Chimney Drip Tray over comes this problem because its design to modulate itself to fit any size chimney stack, and for this reason it has not been over engineered.

The outer edge of the Chimney drip Tray is straight and flush allowing for freedom of movement when modulating the tray to accommodate larger size chimney stacks. The individual chimney drip tray sections are laid on wet or semi dry cement allowing for better freedom of movement, and alignment,.

A series of well placed holes punch out in the tray allows it to bond to the top course of the chimney stack once the cement mortar has set hard.

By simply sliding one section of chimney drip tray along the top of the next, it enables you to expand or retracted the drip tray to meet the profile of any size chimney stack.

The chimney drip tray may be produced on site from one or more profiled lengths, (each length is oversized to ensure the formation of the overhanging drip edge) mitered on all corners allowing for the installation of the drip tray on various chimney stack formations, including installation of the drip tray on half or quarter of a party chimney stack. ,the drip tray profile may be cut to form 90 degrees corners." The chimney drip tray has a minimized sloped profile which overhangs the chimney stack.

There by allowing rain water to drip off the drip tray by means of the overhanging drip Page 3 Inventor's comments.

Why I consider the chimney drip tray idea to be a unique idea.

The Chimney Drip Trays design takes full advantage of the way chimney stacks are formulated and constructed. Despite their individual appearances Chimney stacks have one overriding feature. Their chimney Pot and flue arrangement, which is based on a 2 chamber alignment shown in figure 2. Furthermore, most chimney stacks are constructed out of bricks, and bricks; thankfully conform to the laws of standardization. [yen Chimneys stacks made out of other materials such as stone can be standardized by their chimney flue arrangement, which have been designed to take account of chimney pots sizes. The Chimney Drip Tray has been factory cut to precise lengths and measurements, to take full advantage of these unseen chimney laws. The Chimney Drip Tray is design to expand and contract in length without the need for cutting out sections, and can accommodate any size chimney stack. And because of its modular design I believe its function sets it apart from anything seen to date. The chimney drip tray can accommodate even the very largest chimney stacks. Without changing or cutting one single part other than the parts that come in the box.

Page 4 The invention will now be described solely by way of example and with reference to the accompanying drawings and claims.

Figure 1: Claim 1 shows a side elevation the Chimney Drip Tray. Claim 2 shows the same profile of the Chimney drip tray on the chimney stack in filled with concrete, directing water away from the building with its overhanging surround drip edge shown in claim 3, claim 4 shows the outer layer of bricks in the chimney stack.

Figure 2: Shows the present invention from an Ariel view in relation to the chimney stack and flue arrangement in full view. Claim 5 shows the outer edge of the Tray. Claim 6 shows the uniformed series of holes to allow the cement mortar though. Claim 7 shows a broken line where the front tray would sit, which has been removed to allow visibility of the inner working of the chimney stack. . Claim 8 exposes the alignment of the flues within the chimney stack. Claim 9 shows three full bricks and one half brick course of bricks which is a common feature and arrangement on all two flue aligned chimney stacks.

Figure 3: Claim 10 a section of Drip tray in place. Claim 11 shows a section of drip tray being slide over the top of the existing unit until it meets the required size of this eight flue chimney stack, should it be found to be too long it can simply be slide back to the required size.

Claim 12 Shows the outer single course of the chimney stack, claim 13 shows a broken line which shows even though the corners are mitred by simply moving the overlying tray back just a few inches the two trays act and become one single unit. Claim 14 shows one of the eight chimneys pots sit in relation to the flue chambers. Claim 15 shows how the mitred corners of the tray butt up against each other.

Figure 4: Shows a over head view of the chimney drip tray set around a 2 pot stack configuration. Claim 16 shows the mitred Conner joint up. Claim 17 shows the outer up right edge of the Drip Tray. Claim 18 shows the holes for allowing cement through for bonding the tray to the chimney stack.

Page 5 Inventor of the Chimney Drip Tray.

Peter Watkin Tonbridge Wrexham Road Johnstown Nr Wrexham North Wales

UK

LL L41PA 1*