Services

With over 40 years of experience, Deerpath has become an established leader in the field of historical restoration and preservation.  Deerpath provides optimum professionalism, with an experienced staff that will work with you or in collaboration with your professional services, to help find the right solution for you.  Let us take you through the services that can help restore your building to its finest.

  • Rehabilitation
  • Stonework
  • Masonry Cleaning
  • Brickwork
  • Waterproofing
  • Lintel Steel/Stone Replacement
  • Structural Steel Repair
  • Coping and Parapet Reconstruction Replacement
  • Façade Pinning
  • Stone Unit Replacement
  • Composite Patch
  • Dutchman Repair
  • Stone Pointing
  • Water Curtain Method
  • Chemical Cleaning
  • Micro Abrasive Cleaning
  • Latex Cleaner
  • Brick Repointing
  • Brick Replacement
  • Sealants
  • Coatings
  • Coping Covers
  • Flashings

In older buildings, very often the steel will rust and the lintel and/or steel shelf angle will need replacement. Experience is needed for a potentially dangerous job. Masonry is shored, if needed, when the original lintel is removed. A new rust inhibitive lintel is installed and waterproofed prior to the installation of new masonry.

 

The majority of displaced masonry can be attributed to underlying structural steel corrosion. After masonry removal and required shoring, the structural steel is cleaned of all scale and rust. The most common repair is to add plate, channel and/or angle sections to reinforce existing steel. The extreme cases would be full removal and replacement of existing steel. Rust inhibitive coatings and waterproofing would then be applied prior to the installation of new masonry.

Water penetration at horizontal copings, sills or cornices of masonry facades requires the sealing of all wash surfaces. These joints neglected over time will allow water and moisture to attack structural steel in buildings.

To address parapet movement, the shifted brick must be demolished and rebuilt. Corner cracking calls for demolition and rebuilding of masonry, cleaning the structural steel and working closely with the design professional to detail a reconstruction program. The program will include the repair of any deficient steel, waterproofing, expansion placement, anchorage and installation of new masonry units.

On many older buildings the façade does not need to be entirely replaced. Deerpath uses a variety of pinning techniques that we have experience with. We also can adapt our methods to suit the needs of your building engineers and architects. We aim for the right solution, not just our solution.

If a stone unit is deteriorated beyond repair, it may be more cost effective to replace the stone unit itself. You can replace the stone unit with either manmade or natural materials. With a manufactured product, special sizes and shapes can be made and the characteristics controlled by the choice of ingredients. Molds can be made directly from the existing units.

When limited areas of stone surfaces have exfoliated and decayed to the point where resurfacing is ineffective or unadvisable, composite patching may be used to reconstruct them. Using this technique, missing stone faces and modest sized projections are duplicated through a series of stucco-like applications of mortar mixes. The final application is treated to match the form and dressing of the original surface.

Dutchman repairs are useful for replacing small, missing or deteriorated sections of stone. The hole is trimmed and squared. An insert of either matching neutral stone or a compatible cast stone facsimile is cut to size and surfaced to match the existing material. Once in place the dutchman is wedged and bonded with epoxy or other adhesive.

The most basic repair of stonework is repointing. As in all repointing work, three major criteria must be met: 1) the repointing should re-establish the surface continuity of the wall, leaving no opening through which water can enter; 2) the mortar should be softer and have a lower compressive strength than the stonework; 3) the mortar should match the color and texture of the original.

Prolonged spraying or misting with water is particularly effective for cleaning limestone and marble. Water is distributed through lengths of pipe with non-ferrous spray nozzles hung from moveable scaffolding that sprays a continuous or intermittent mist over the masonry surface. This is a very gentle method to use on historic masonry.

Chemical cleaners remove dirt, as well as paint and other coatings, metallic, plant stains and graffiti. Chemical cleaners used to remove dirt and soiling include acids, alkalis and organic compounds.

Micro abrasive cleaning includes a dry or wet method using such materials as Dolomite powder, Aluminum Oxide, micro glass beads and others. Highly trained professionals must perform it under very controlled circumstances. Some systems are self-contained which are environmentally preferred.

Latex cleaners are suitable for interior cleaning to remove pollution and dust from all kinds of surfaces. Latex cleaning can easily be done while the building is occupied, as it uses remarkably little water, and generates no dust. Based on a specifically formulated natural latex rubber, it is effective for the removal of soiling from architectural surfaces, including natural stone, brick, terracotta, concrete, plaster and marble.

Repointing, also known as pointing, is the process of removing deteriorated mortar from the joints of a masonry wall and replacing it with new mortar. When properly done, repointing restores the visual and physical integrity of the masonry.

Displaced masonry, such as bulging face brick or corner and column cracks should be completely removed. After correcting structural steel and support deficiencies, new masonry units to match existing are installed. Replaced sections of masonry are tied into the backup masonry and structural steel with non-corrosive anchors.

Sealants can be used in various applications such as windows, control joints, wash surfaces or to bridge dissimilar materials.

Waterproof coatings seal the surface from liquid and from water vapor. They usually are opaque, such as bituminous coatings and some paints. Water repellents keep liquid from penetrating the surface but also allows masonry to breathe.

Copings are a key element to waterproofing, as they are located at the top of walls and subject to direct water exposure. Poor sealing, insufficient protection and not enough angle are some of the reasons for needing coping cover alterations or replacement.

Improper or no flashing on facade elements can be the clear cause of deterioration and water infiltration. Lack of drip edge on projecting elements can also lead to deterioration and present a need for flashing. Analysis is the key to solving any of the problems.

Rehabilitation

Lintel Steel/Stone Replacement

In older buildings, very often the steel will rust and the lintel and/or steel shelf angle will need replacement. Experience is needed for a potentially dangerous job. Masonry is shored, if needed, when the original lintel is removed. A new rust inhibitive lintel is installed and waterproofed prior to the installation of new masonry.

Structural Steel Repair

 

The majority of displaced masonry can be attributed to underlying structural steel corrosion. After masonry removal and required shoring, the structural steel is cleaned of all scale and rust. The most common repair is to add plate, channel and/or angle sections to reinforce existing steel. The extreme cases would be full removal and replacement of existing steel. Rust inhibitive coatings and waterproofing would then be applied prior to the installation of new masonry.

Coping and Parapet Reconstruction Replacement

Water penetration at horizontal copings, sills or cornices of masonry facades requires the sealing of all wash surfaces. These joints neglected over time will allow water and moisture to attack structural steel in buildings.

To address parapet movement, the shifted brick must be demolished and rebuilt. Corner cracking calls for demolition and rebuilding of masonry, cleaning the structural steel and working closely with the design professional to detail a reconstruction program. The program will include the repair of any deficient steel, waterproofing, expansion placement, anchorage and installation of new masonry units.

Façade Pinning

On many older buildings the façade does not need to be entirely replaced. Deerpath uses a variety of pinning techniques that we have experience with. We also can adapt our methods to suit the needs of your building engineers and architects. We aim for the right solution, not just our solution.

Stonework

Stone Unit Replacement

If a stone unit is deteriorated beyond repair, it may be more cost effective to replace the stone unit itself. You can replace the stone unit with either manmade or natural materials. With a manufactured product, special sizes and shapes can be made and the characteristics controlled by the choice of ingredients. Molds can be made directly from the existing units.

Composite Patch

When limited areas of stone surfaces have exfoliated and decayed to the point where resurfacing is ineffective or unadvisable, composite patching may be used to reconstruct them. Using this technique, missing stone faces and modest sized projections are duplicated through a series of stucco-like applications of mortar mixes. The final application is treated to match the form and dressing of the original surface.

Dutchman Repair

Dutchman repairs are useful for replacing small, missing or deteriorated sections of stone. The hole is trimmed and squared. An insert of either matching neutral stone or a compatible cast stone facsimile is cut to size and surfaced to match the existing material. Once in place the dutchman is wedged and bonded with epoxy or other adhesive.

Stone Pointing

The most basic repair of stonework is repointing. As in all repointing work, three major criteria must be met: 1) the repointing should re-establish the surface continuity of the wall, leaving no opening through which water can enter; 2) the mortar should be softer and have a lower compressive strength than the stonework; 3) the mortar should match the color and texture of the original.

Masonry Cleaning

Water Curtain Method

Prolonged spraying or misting with water is particularly effective for cleaning limestone and marble. Water is distributed through lengths of pipe with non-ferrous spray nozzles hung from moveable scaffolding that sprays a continuous or intermittent mist over the masonry surface. This is a very gentle method to use on historic masonry.

Chemical Cleaning

Chemical cleaners remove dirt, as well as paint and other coatings, metallic, plant stains and graffiti. Chemical cleaners used to remove dirt and soiling include acids, alkalis and organic compounds.

Micro Abrasive Cleaning

Micro abrasive cleaning includes a dry or wet method using such materials as Dolomite powder, Aluminum Oxide, micro glass beads and others. Highly trained professionals must perform it under very controlled circumstances. Some systems are self-contained which are environmentally preferred.

Latex Cleaner

Latex cleaners are suitable for interior cleaning to remove pollution and dust from all kinds of surfaces. Latex cleaning can easily be done while the building is occupied, as it uses remarkably little water, and generates no dust. Based on a specifically formulated natural latex rubber, it is effective for the removal of soiling from architectural surfaces, including natural stone, brick, terracotta, concrete, plaster and marble.

Brickwork

Brick Repointing

Repointing, also known as pointing, is the process of removing deteriorated mortar from the joints of a masonry wall and replacing it with new mortar. When properly done, repointing restores the visual and physical integrity of the masonry.

Brick Replacement

Displaced masonry, such as bulging face brick or corner and column cracks should be completely removed. After correcting structural steel and support deficiencies, new masonry units to match existing are installed. Replaced sections of masonry are tied into the backup masonry and structural steel with non-corrosive anchors.

Waterproofing

Sealants

Sealants can be used in various applications such as windows, control joints, wash surfaces or to bridge dissimilar materials.

Coatings

Waterproof coatings seal the surface from liquid and from water vapor. They usually are opaque, such as bituminous coatings and some paints. Water repellents keep liquid from penetrating the surface but also allows masonry to breathe.

Coping Covers

Copings are a key element to waterproofing, as they are located at the top of walls and subject to direct water exposure. Poor sealing, insufficient protection and not enough angle are some of the reasons for needing coping cover alterations or replacement.

Flashings

Improper or no flashing on facade elements can be the clear cause of deterioration and water infiltration. Lack of drip edge on projecting elements can also lead to deterioration and present a need for flashing. Analysis is the key to solving any of the problems.