Roof Waterproofing Costs & Repairs – FAQs

How Much Does It Cost To Waterproof a Roof ?

Obviously there are various contributing factors affecting the cost of a roof waterproofing project – especially if construction repairs & restoration are also involved.

• Using Liquid Applied Membranes the spray application stage of a roof project can be determined with respect to time (weather permitting).Find out about Liquid Applied Membranes HERE
• However a major cost is the time required to prepare a roof surface prior to waterproof membrane application.
• The Team at Findlay-Evans pride themselves on painstaking and often hand detailing a roof site.
• Great – not just good- preparation can mean the difference between waterproofing success or failure.

Meticulous waterproofing preparation means Findlay-Evans have confidence in our work, stand by our guarantees with excellent customer satisfaction.See Our Testimonials Here

Roof Waterproofing Method – Preparation

• Old roofs over the years accumulate layers of pollution, chemicals & materials.
• These areas need to be thoroughly cleaned prior to waterproofing.

Case Study Video Below

Failed membrane due to bad preparation.

Failure to implement meticulous & rigorous preparation may mean the membrane, whatever method used, will not adhere to the substrate.

• Waterproofing preparation is especially important for roof surfaces that we call “busy” i.e multitude of rooftop services & plant decks.
• These areas need to be detailed and made water tight around, under and over all upstands, penetrations etc.
• Time & method taken can be significant – hence preparation costs can add up.

Video Roof Case Study

Melb CBD Power Station requiring extensive preparation work prior to waterproofing.

• Many leaking roofs have not been regularly maintained, and often have been subject to routine patch repairs .
• Over the years we have seen it all.
• The multiple attempts to stop roof leaks by contractors and maintenance crews using everything from caulking to TPO patches, even peel and stick roofing patches.
• Often times patches do not adhere and only managed to hide evidence of membrane damage caused by saturation.
• Previous repairs have to be eliminated or managed prior to installation of a new membrane.

Case Study: Severe cracks on existing roof membrane

Cracks & voids covered – ready for spray application of Liquid Rubber

At some stage it becomes unmanageable to keep spending the maintenance dollar on short term roof repairs.

• Many roof surfaces are well & truly at the end of their life cycle and in dreadful condition. In these cases roof surface cleaning, prepping & detailing is time consuming.

• Flat roofs, concrete & metal, have seams, flashings, vents, fastener holes, upstands for roof services, old layers of bitumen………….. the list goes on.
• Existing roof penetrations may be historically sealed with only a bead of caulking.
• Sheet membranes may have heat-welded seam failures that need detailing & preparation.

Roof preparation – ballast

Preparation of all seams & joins to waterproofing

• Puncture holes can be prolific, from years of foot traffic servicing HVAC units, vibrational movement of the roof-mount equipment and thermal cycling.

Prepping & detailing makes a roof surface suitable for membrane installation.

Guarantees a robust, long life & strongly adhered waterproof membrane to the substrate.

Sheet membrane prepped & detailed along failed seam joins.

Sheet membrane deteriorated due to “ponding” water.

METICULOUS DETAILING PRIOR TO MEMBRANE INSTALLATION ADDS TO THE TIME & COST OF A PROJECT.

However the consequences of not doing this correctly is even more costly & time consuming.

Solvent-free, water-based building products offer immediate solutions to both safer worksites plus quality, high performance adhesives and protection.