AU758879B2 - Membranous termite barrier - Google Patents
Membranous termite barrier Download PDFInfo
- Publication number
- AU758879B2 AU758879B2 AU64430/99A AU6443099A AU758879B2 AU 758879 B2 AU758879 B2 AU 758879B2 AU 64430/99 A AU64430/99 A AU 64430/99A AU 6443099 A AU6443099 A AU 6443099A AU 758879 B2 AU758879 B2 AU 758879B2
- Authority
- AU
- Australia
- Prior art keywords
- termite
- membranous
- barrier
- matting
- termite barrier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 241000256602 Isoptera Species 0.000 title claims description 73
- 230000004888 barrier function Effects 0.000 title claims description 51
- 239000000463 material Substances 0.000 claims description 14
- 239000000853 adhesive Substances 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 12
- 238000007689 inspection Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000011324 bead Substances 0.000 claims description 7
- 239000004570 mortar (masonry) Substances 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 5
- -1 polyethylene Polymers 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 230000002745 absorbent Effects 0.000 claims description 4
- 239000002250 absorbent Substances 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 4
- 238000011065 in-situ storage Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- WHRZCXAVMTUTDD-UHFFFAOYSA-N 1h-furo[2,3-d]pyrimidin-2-one Chemical compound N1C(=O)N=C2OC=CC2=C1 WHRZCXAVMTUTDD-UHFFFAOYSA-N 0.000 claims description 3
- 239000005944 Chlorpyrifos Substances 0.000 claims description 3
- 235000006173 Larrea tridentata Nutrition 0.000 claims description 3
- 244000073231 Larrea tridentata Species 0.000 claims description 3
- SBPBAQFWLVIOKP-UHFFFAOYSA-N chlorpyrifos Chemical compound CCOP(=S)(OCC)OC1=NC(Cl)=C(Cl)C=C1Cl SBPBAQFWLVIOKP-UHFFFAOYSA-N 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 229960002126 creosote Drugs 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 238000005470 impregnation Methods 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 238000004078 waterproofing Methods 0.000 claims description 3
- 240000004460 Tanacetum coccineum Species 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000003085 diluting agent Substances 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 239000011152 fibreglass Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 claims description 2
- 229920002994 synthetic fiber Polymers 0.000 claims description 2
- NFACJZMKEDPNKN-UHFFFAOYSA-N trichlorfon Chemical compound COP(=O)(OC)C(O)C(Cl)(Cl)Cl NFACJZMKEDPNKN-UHFFFAOYSA-N 0.000 claims description 2
- 241001559589 Cullen Species 0.000 claims 1
- 230000001419 dependent effect Effects 0.000 claims 1
- 239000000047 product Substances 0.000 description 14
- 239000011449 brick Substances 0.000 description 11
- 238000010276 construction Methods 0.000 description 5
- 239000004575 stone Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- 241001509990 Rhinotermitidae Species 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004459 forage Substances 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
- 239000002424 termiticide Substances 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Building Environments (AREA)
- Catching Or Destruction (AREA)
Description
I 1 1
AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT
O
C
Name of Applicant: Actual Inventor: TERMITE TITE PTY LTD (ACN 076 847 811) TERRY JOHN TRAPNELL Address for Service: CULLEN CO., Patent Trade Mark Attorneys, 240 Queen Street, Brisbane, Qld. 4000, Australia.
MEMBRANOUS TERMITE BARRIER Invention Title: Details of Associated Provisional Application: No. PP7833 filed 12 December 1998 The following statement is a full description of this invention, including the best method of performing it known to us: 2 BACKGROUND OF THE INVENTION This invention relates to the protection of buildings from subterranean termites and is particularly concerned with membranous termite barriers for incorporating into concrete slab-on-ground buildings having a masonry veneer cladding, during their construction.
Subterranean termites typically build nests just beneath the soil surface and forage, principally for cellulose containing material, for distances which can reach hundreds of metres from their nests. Termite damage to buildings, particularly residential buildings can be as many as one building in five in some parts of Australia, costing the community many tens of millions of S 15 dollars annually in the repair of the affected timber.
As a result, the Australian Building Code has made it compulsory for all new buildings to incorporate suitable termite barriers. The currently Building Code is laid down in Australian Standard 33460.1-1995. This standard 20 specifies three permissible systems for protecting concrete slabs from termite penetration. The systems comprise the use of stainless steel mesh, graded stone or chemicals.
Chemicals soil barriers have recently come under attached by environmentalists on the basis that their toxicities may be harmful to man. This has lead to the banning of conventional chemicals and the use of more environmentally friendly materials. Unfortunately such materials are less effective and may have no effect whatsoever after as little as twelve months from application.
Graded stone barriers must satisfy a large number of criteria to be effective. The stones must be of crushed igneous or metamorphic origin, be from a sound source, have a minimum sg of 2.52, and be graded and shaped so that the termites cannot lift them or penetrate their voids. A typical product meeting these requirements is GRANITGARD which is granite stone, supplied by CSR Readymix, a Division of CSR Limited. The problem with such products, however, is that they cannot effectively be used on sloping ground surfaces, supply in many parts of Australia is difficult, and they are relatively expensive.
Stainless steel mesh barriers are consequently now in widespread use. These barriers are, nevertheless, not without their drawbacks. Apart from their relatively high cost, which cannot be avoided, there are particular problems when it comes to their installation at the perimeter of concrete slabs having masonry veneer walls.
The commonly used method comprises parging an inner edge of the mesh to be perimeter of the slab and extending the mesh out under the row of bricks which I substantially 15 level with the slab. The parging material is an adhesive, which is required to be termite resistant, form a strong bond between the mesh and the concrete, and be durable over the life expectancy of the building. In practice, however, it is difficult to form a proper seal with the parging material due to the relative movement between the bricks and the concrete slab due to different rates of drying, and expansion and contraction taking place. The integrity of the seal is therefore frequently broken and regions for termite entry are provided.
DESCRIPTION OF THE PRIOR ART One way of overcoming the previous problems is the subject of Australian Patent Application No.
64411/96. This patent application describes a physical termite barrier for incorporating in the perimeter of a concrete slab and an adjacent masonry wall. It comprises a continuous sheet of termite resistant material, selected from sheet metals and sheet plastics materials, which has a substantially Z-shaped profile incorporating movement resisting deformations. Curved regions are provided where the three planes of the sheet meet which function to assist the barrier to resist sheer fracture when the barrier is set in the concrete slab and the barrier is set in the concrete slab and masonry wall.
The barrier is arranged in situ with one end planar section extending substantially horizontally into the concrete slab, inwardly of the perimeter, the other planar end section extending in the masonry mortar over the upper surface of the upper row of perimeter bricks/blocks, and the intermediate planar section extending perpendicularly within the slab adjacent the perimeter thereof.
While such a barrier is an extremely effective termite barrier for the life of the building, it has the disadvantage that if the adjacent masonry slab if not built to the correct tolerances, then the barrier will not be positioned in the most effective location within the mortar joint. Furthermore, the relative inflexibility of the barrier can give rise to other minor difficulties in the handling and laying of the product.
OBJECT OF THE INVENTION It is therefore an object of the invention to provide a termite barrier which has all of the advantages of the termite barrier of Australian Patent Application No. 64411/96 but which does not have the disadvantages referred to above.
SUMMARY OF THE INVENTION According to one aspect of the present invention there is provided a membranous termite barrier which is adapted to extend between the mortar course of a masonry wall and an adjacent concrete slab, said membranous termite barrier comprising a matting impregnated with a termite resisting product, said matting being sufficiently absorbent to facilitate its impregnation with the liquid termite resistant product.
The matting is typically in the form of a longitudinally extending strip which can be rolled out over an upper coarse of the masonry wall (which at this stage of construction is only a few courses high) and can be adhered to the adjacent concrete slab.
The edge of the matting strip which is adapted for location on the upper coarse of the masonry wall, nR1.
-ithin the mortar joint, preferably has an associated ,spection band welded or adhered along its edge in order to enable the mortar joint to be racked without destroying the edge of the matting, and to ensure that the termite resistant product embedded therein is not lost by evaporation to the air or diluted by moisture adsorption from the air.
According to a second aspect of the invention, there is provided a method for installing a membranous termite barrier of the aforementioned type, in situ, which method comprises the steps of: adhering an inspection band to the horizontal outer edge of a masonry course which lies adjacent a concrete slab, (ii) laying a continuous bead of termite oooo resistant adhesive along the upper surface of the inspection band and also along a face of the concrete oo. slab to which the membranous termite matting is to be joined, (iii) placing the membranous termite matting between the beads of adhesive so as to extend lengthwise 0 :between the upper surface of the masonry course and the .00 g concrete slab, and 0000 (iv) coating and/or impregnating the membranous 00000.
termite matting with a termite resistant product.
DETAILED DESCRIPTION OF THE INVENTION *000 The membranous termite matting can be S0" fabricated from natural or artificial fibres, or mixtures thereof, which can be formed in small discrete lengths or long fibres which are woven into fabrics. Particularly suitable mattings include fibreglass matting, polyester and polyethylene waddings and fabrics such as geofabrics, and combinations of these materials.
The termite resistant product is not a "termiticide" of the type which has been used in the past which was toxic to humans, but a product which is environmentally friendly but nevertheless toxic to termites. A range of such products are now commonly available and these include the pyrethrums, chlorpyrifos and chlorfos.
Suitably, the termite resistant product incorporates a waterproofing compound, or mixture of such ooo: compounds and/or other active ingredients, additives or 0000 :.000 diluents. Typical examples of such additives include petroleum by-products such as creosote, and polyurethane go• obased water repelling agents such as orminoid.
S0o. The inspection band is a non-absorbent sheet of plastics material or other such material which can be joined to the membranous termite barrier either during or prior to construction. Preferably it is joined after construction, that is, it is a separate item which is independently fitted to the masonry layer before the membranous termite barrier is laid in situ. The .000inspection band can be a polyethylene or like band which is fitted so as to have an edge which is flush with the face of the masonry so as to form a visible inspection strip to detect any termite intrusion.
The membranous termite barrier is easy to install because of its flexible characteristics, and can be sold in convenient coiled rolls. Impregnation with the termite resistant product can be made either prior to sale or, preferably, at the site of installation.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view of a membranous termite barrier fitted between a brick course and a raft slab, RFigure 2 is a cross-sectional view of a membranous termite barrier fitted between a brick course and an infill slab according to one method, and Figure 3 is a cross-sectional view of a membranous termite barrier fitted between a brick course and an infill slab according to another method.
DESCRIPTION OF PREFERRED EMBODIMENTS Preferred embodiments of the invention will now be described with reference to the accompanying drawings in all of which like reference numerals refer to like parts.
Referring firstly to Figure 1, there is depicted a brick course 10, a concrete raft slab 11, a foundation 12 and a base plate 13 of a building.
A thin band 14 of a polyethylene plastics material is fixed with a termite resistant adhesive to the upper outer edge of the brick course 10 so as to be flush with the outer edge thereof. The band extends about two fifths of the way across the brick course and extends lengthwise along the brick course. The adhesive used to fix the band forms a continuous unbroken termite 20 barrier.
The membranous termite barrier 20 comprises a strip of polyester woven fabric which is adhered to the "'"band 14 of plastics material at and to the outer face of the concrete slab 11 at The adhesive is such as to form a continuous seal along the outer face of the slab. An adhesive bead seal 17 is also formed on the outer facing edge of the membranous termite barrier The membranous termite barrier 20 extends the entire length of the brick course 10 and forms a continuous curved portion 15 across the cavity 16. It is impregnated with a termite resistant product including a waterproofing agent, which consists of a mixture of 5% by weight creosote, 5% by weight chlorpyrifos and 90% by weight orminoid®.
The Figure 2 embodiment to which reference is now made, differs from Figure 1 in that there is no cavity and the membranous termite barrier 21 is laid flat 8 across the top of a horizontal portion of a rebate 18 in the concrete slab 11. Adhesive 19 is applied to the horizontal portion of the rebate and a bead of the adhesive is also applied to the upper corner region as illustrated. The rest of the termite barrier is as described above with respect to Figure 1.
Figure 3 illustrates the same masonry/slab construction as Figure 2 but here the membranous termite barrier 22 is curved upwardly at 24 and adhered at to the vertical face 23 of the rebate 18. An adhesive bead seal 25 is also formed on the top upper facing edge of the membranous termite barrier 22 to prevent moisture being absorbed into, or termite resisting product being released from, the edge of the barrier.
15 Whilst the above has been given by way of illustrative example of the invention, many modifications and variation may be made thereto by persons skilled in the art without departing from the broad scope and ambit of the invention as herein set forth.
roo oooo oooo
Claims (8)
1. A membranous termite barrier which is adapted to extend between the mortar course of a masonry wall and an adjacent concrete slab, said membranous barrier comprising a matting impregnated with a termite resisting product, said matting being sufficiently absorbent to facilitate its impregnation with the liquid termite resistant prcduct.
2. A membranous termite barrier as claimed in claim 1 in the form of a longitudinally extending strip which can be rolled out over an upper coarse of the masonry wall and can be adhered to the adjacent concrete slab. o eee
3. A membranous termite barrier as claimed in claim 1 or claim 2, wherein an edge of the matting has an eo ~associated inspection band welded or adhered thereto which prevents damage to the matting when the mortar joint is racked and which prevents the edge of the matting acting as a passageway through which the impregnated termite resisting product could escape by 9 evaporation or leakage, or be diluted by moisture adsorption from the air. ooeo S4. A membranous termite barrier as claimed in any one of the preceding claims, wherein the matting is fabricated from natural or artificial fibres, or mixtures thereof, which are formed in small discrete lengths or long fibres woven into fabrics. A membranous termite barrier as claimed in any one of the preceding claims, wherein the matting is woven fibreglass, polyester or polyethylene wadding, or geofabric.
6. A membranous termite barrier as claimed in any one of the preceding claims, wherein the matting is multi-layered.
7. A membranous termite barrier as claimed in any one of the preceding claims, wherein the termite resisting product is selected from the group consisting of pyrethrums, chlorpyrifos and chlorfos.
8. A membranous termite barrier as claimed in any one of the preceding claims, wherein the termite 96 resisting product additionally includes a waterproofing compound, other additives and/or diluents.
9. A membranous termite barrier as claimed in claim 8, wherein the additives are selected from creosote :and orminoid®. A membranous termite barrier as claimed in o* claim .3 or any claim dependent upon claim 3, wherein the inspection band is a non-absorbent sheet of plastics material. o0000. 11. A membranous termite barrier as claimed in
900. claim 11, wherein the plastics material is polyethylene. 12. A method for placing a membranous termite barrier as claimed in any one of the preceding claims, in situ, which method comprises the steps of: adhering an inspection band to the horizontal outer edge of a masonry course which lies adjacent a concrete slab, (ii) laying a continuous bead of termite resistant adhesive along the upper surface of the inspection band and also Ralong a face of the concrete slab to which the membranous termite matting is to be joined, (iii) placing the membranous termite matting between the beads of adhesive so as to extend lengthwise between the upper surface of the masonry course and the concrete slab, and (iv) coating and/or impregnating the membranous termite matting with a termite resistant product. 13. A membranous termite barrier substantially as 000 herein described with reference to the accompanying drawings. S*. DATED this 20 h day of November 2002 Termite Tite Pty Ltd By their Patent Attorneys CULLEN CO sees gS 0
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU64430/99A AU758879B2 (en) | 1998-12-21 | 1999-12-08 | Membranous termite barrier |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPP7833 | 1998-12-21 | ||
| AUPP7833A AUPP783398A0 (en) | 1998-12-21 | 1998-12-21 | Membranous termite barrier |
| AU64430/99A AU758879B2 (en) | 1998-12-21 | 1999-12-08 | Membranous termite barrier |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2003207031A Division AU2003207031A1 (en) | 1998-12-21 | 2003-07-03 | Membranous Termite Barrier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU6443099A AU6443099A (en) | 2000-06-22 |
| AU758879B2 true AU758879B2 (en) | 2003-04-03 |
Family
ID=25634347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU64430/99A Expired AU758879B2 (en) | 1998-12-21 | 1999-12-08 | Membranous termite barrier |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU758879B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007030875A1 (en) * | 2005-09-12 | 2007-03-22 | Magisurf Pty Ltd | Method of forming a termite barrier |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4865590A (en) * | 1989-01-25 | 1990-08-02 | Walter Everard John Groom | Sheet, plastic, combination moisture and termite barrier (underlay or wrap) and sealing tape |
| AU6818996A (en) * | 1995-10-11 | 1997-04-17 | John Royden Ellis | Pest barrier for new or existing slabs |
-
1999
- 1999-12-08 AU AU64430/99A patent/AU758879B2/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4865590A (en) * | 1989-01-25 | 1990-08-02 | Walter Everard John Groom | Sheet, plastic, combination moisture and termite barrier (underlay or wrap) and sealing tape |
| AU6818996A (en) * | 1995-10-11 | 1997-04-17 | John Royden Ellis | Pest barrier for new or existing slabs |
Also Published As
| Publication number | Publication date |
|---|---|
| AU6443099A (en) | 2000-06-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| CB | Opposition lodged by |
Opponent name: TERMGUARD PTY LTD |
|
| PC1 | Assignment before grant (sect. 113) |
Owner name: TERMITE TITE PTY LTD, TJT (NSW) PTY LTD, YORK NOMI Free format text: THE FORMER OWNER WAS: TERMITE TITE PTY LTD |
|
| CH | Opposition withdrawn |
Opponent name: TERMGUARD PTY LTD |
|
| FGA | Letters patent sealed or granted (standard patent) | ||
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |